2.4.0

* Improve performance of sl-icon by caching later

* Fixed error handling

* Don't use requestInclude in sl-icon

* Separate sl-icon errors into cacheable and retryable errors

cspell.json

@@ -9,9 +9,13 @@
     "atrule",
     "autocorrect",
     "autofix",
+    "autoload",
+    "autoloader",
+    "autoloading",
     "autoplay",
     "bezier",
     "boxicons",
+    "CACHEABLE",
     "callout",
     "callouts",
     "chatbubble",
@@ -36,6 +40,7 @@
     "datetime",
     "describedby",
     "Docsify",
+    "dogfood",
     "dropdowns",
     "easings",
     "enterkeyhint",
@@ -107,6 +112,8 @@
     "reregister",
     "resizer",
     "resizers",
+    "retargeted",
+    "RETRYABLE",
     "rgba",
     "roadmap",
     "Roboto",

docs/assets/plugins/metadata/metadata.js

@@ -436,6 +436,9 @@
           result += `
             ## Importing
 
+            If you're using the autoloader or the traditional loader, you can ignore this section. Otherwise, feel free to
+            use any of the following snippets to [cherry pick](getting-started/installation#cherry-picking) this component.
+
             <sl-tab-group>
             <sl-tab slot="nav" panel="script">Script</sl-tab>
             <sl-tab slot="nav" panel="import">Import</sl-tab>

docs/assets/styles/docs.css

@@ -8,6 +8,17 @@ html {
   box-sizing: inherit;
 }
 
+/* Show custom elements only after they're registered */
+:not(:defined),
+:not(:defined) * {
+  opacity: 0;
+}
+
+:defined {
+  opacity: 1;
+  transition: 0.1s opacity;
+}
+
 body {
   font-family: var(--sl-font-sans);
   font-size: var(--sl-font-size-medium);

docs/components/carousel.md

@@ -533,7 +533,7 @@ const App = () => (
 
 ### Adding and Removing Slides
 
-The content of the carousel can be changed by appending or removing carousel items. The carousel will update itself automatically.
+The content of the carousel can be changed by adding or removing carousel items. The carousel will update itself automatically.
 
 ```html preview
 <sl-carousel class="dynamic-carousel" pagination navigation>
@@ -582,12 +582,19 @@ The content of the carousel can be changed by appending or removing carousel ite
       slide.innerText = `Slide ${dynamicCarousel.children.length + 1}`;
       slide.style.setProperty('background', `var(--sl-color-${color}-200)`);
       dynamicCarousel.appendChild(slide);
+      dynamicRemove.disabled = false;
     };
 
     const removeSlide = () => {
       const slide = dynamicCarousel.children[dynamicCarousel.children.length - 1];
-      slide.remove();
-      colorIndex--;
+      const numSlides = dynamicCarousel.querySelectorAll('sl-carousel-item').length;
+
+      if (numSlides > 1) {
+        slide.remove();
+        colorIndex--;
+      }
+
+      dynamicRemove.disabled = numSlides - 1 <= 1;
     };
 
     dynamicAdd.addEventListener('click', addSlide);
@@ -656,9 +663,7 @@ const App = () => {
 
 ### Vertical Scrolling
 
-Setting the `orientation` attribute to `vertical`, will make the carousel laying out vertically, making it
-possible for the user to scroll it up and down. In case of heterogeneous content, for example images of different sizes,
-it's important to specify a predefined height to the carousel through CSS.
+Setting the `orientation` attribute to `vertical` will render the carousel in a vertical layout. If the content of your slides vary in height, you will need to set amn explicit `height` or `max-height` on the carousel using CSS.
 
 ```html preview
 <sl-carousel class="vertical" pagination orientation="vertical">
@@ -895,7 +900,7 @@ const App = () => {
 
 ### Scroll Hint
 
-Use the `--scroll-hint` attribute to add inline padding in horizontal carousels and block padding in vertical carousels. Setting a padding will make the closest slides slightly visible, hinting that there are more items in the carousel.
+Use the `--scroll-hint` custom property to add inline padding in horizontal carousels and block padding in vertical carousels. This will make the closest slides slightly visible, hinting that there are more items in the carousel.
 
 ```html preview
 <sl-carousel class="scroll-hint" pagination style="--scroll-hint: 10%;">

docs/components/checkbox.md

@@ -100,7 +100,8 @@ Use the `setCustomValidity()` method to set a custom validation message. This wi
   const errorMessage = `Don't forget to check me!`;
 
   // Set initial validity as soon as the element is defined
-  customElements.whenDefined('sl-checkbox').then(() => {
+  customElements.whenDefined('sl-checkbox').then(async () => {
+    await checkbox.updateComplete;
     checkbox.setCustomValidity(errorMessage);
   });
 

docs/components/qr-code.md

@@ -17,8 +17,10 @@ QR codes are useful for providing small pieces of information to users who can q
   const qrCode = container.querySelector('sl-qr-code');
   const input = container.querySelector('sl-input');
 
-  input.value = qrCode.value;
-  input.addEventListener('sl-input', () => (qrCode.value = input.value));
+  customElements.whenDefined('sl-qr-code').then(() => {
+    input.value = qrCode.value;
+    input.addEventListener('sl-input', () => (qrCode.value = input.value));
+  });
 </script>
 
 <style>

docs/components/radio-group.md

@@ -175,7 +175,7 @@ Use the `setCustomValidity()` method to set a custom validation message. This wi
   const errorMessage = 'You must choose the last option';
 
   // Set initial validity as soon as the element is defined
-  customElements.whenDefined('sl-radio-group').then(() => {
+  customElements.whenDefined('sl-radio').then(() => {
     radioGroup.setCustomValidity(errorMessage);
   });
 

docs/frameworks/angular.md

@@ -41,6 +41,38 @@ import { AppComponent } from './app.component';
 export class AppModule {}
 ```
 
+## Reference Shoelace components in your Angular component code
+
+```js
+import { SlDrawer } from '@shoelace-style/shoelace';
+
+@Component({
+  selector: 'app-drawer-example',
+  template: '<div id="page"><button (click)="showDrawer()">Show drawer</button><sl-drawer #drawer label="Drawer" class="drawer-focus" style="--size: 50vw"><p>Drawer content</p></sl-drawer></div>'
+})
+export class DrawerExampleComponent implements OnInit {
+
+  // use @ViewChild to get a reference to the #drawer element within component template
+  @ViewChild('drawer')
+  drawer?: ElementRef<SlDrawer>;
+
+  ...
+
+  constructor(...) {
+  }
+
+  ngOnInit() {
+  }
+
+  ...
+
+  showDrawer() {
+    // use nativeElement to access Shoelace components
+    this.drawer?.nativeElement.show();
+  }
+}
+```
+
 Now you can start using Shoelace components in your app!
 
 ?> Are you using Shoelace with Angular? [Help us improve this page!](https://github.com/shoelace-style/shoelace/blob/next/docs/frameworks/angular.md)

docs/frameworks/vue.md

@@ -58,7 +58,7 @@ Now you can start using Shoelace components in your app!
 
 ### QR code generator example
 
-```vue
+```html
 <template>
   <div class="container">
     <h1>QR code generator</h1>
@@ -70,22 +70,22 @@ Now you can start using Shoelace components in your app!
 </template>
 
 <script setup>
-import { ref } from 'vue';
-import '@shoelace-style/shoelace/dist/components/qr-code/qr-code.js';
-import '@shoelace-style/shoelace/dist/components/input/input.js';
+  import { ref } from 'vue';
+  import '@shoelace-style/shoelace/dist/components/qr-code/qr-code.js';
+  import '@shoelace-style/shoelace/dist/components/input/input.js';
 
-const qrCode = ref();
+  const qrCode = ref();
 </script>
 
 <style>
-.container {
-  max-width: 400px;
-  margin: 0 auto;
-}
+  .container {
+    max-width: 400px;
+    margin: 0 auto;
+  }
 
-sl-input {
-  margin: var(--sl-spacing-large) 0;
-}
+  sl-input {
+    margin: var(--sl-spacing-large) 0;
+  }
 </style>
 ```
 
@@ -98,3 +98,18 @@ When binding complex data such as objects and arrays, use the `.prop` modifier t
 ```
 
 ?> Are you using Shoelace with Vue? [Help us improve this page!](https://github.com/shoelace-style/shoelace/blob/next/docs/frameworks/vue.md)
+
+### Slots
+
+To use Shoelace components with slots, follow the Vue documentation on using [slots with custom elements](https://vuejs.org/guide/extras/web-components.html#building-custom-elements-with-vue).
+
+Here is an example:
+
+```html
+<sl-drawer label="Drawer" placement="start" class="drawer-placement-start" :open="drawerIsOpen">
+  This drawer slides in from the start.
+  <div slot="footer">
+    <sl-button variant="primary" @click=" drawerIsOpen = false">Close</sl-button>
+  </div>
+</sl-drawer>
+```

docs/getting-started/installation.md

@@ -1,32 +1,50 @@
 # Installation
 
-You can use Shoelace via CDN or by installing it locally. You can also [cherry pick](#cherry-picking) individual components for faster load times.
-
-If you're using a framework, make sure to check out the pages for [React](/frameworks/react), [Vue](/frameworks/vue), and [Angular](/frameworks/angular).
+You can load Shoelace via CDN or by installing it locally. If you're using a framework, make sure to check out the pages for [React](/frameworks/react), [Vue](/frameworks/vue), and [Angular](/frameworks/angular) for additional information.
 
 ## CDN Installation (Easiest)
 
-The easiest way to install Shoelace is with the CDN. Just add the following tags to your page to get all components and the default light theme.
+<sl-tab-group>
+<sl-tab slot="nav" panel="autoloader" active>Autoloader</sl-tab>
+<sl-tab slot="nav" panel="traditional">Traditional Loader</sl-tab>
+
+<sl-tab-panel name="autoloader">
+
+The experimental autoloader is the easiest and most efficient way to use Shoelace. A lightweight script watches the DOM for unregistered Shoelace elements and lazy loads them for you — even if they're added dynamically.
+
+While convenient, autoloading may lead to a [Flash of Undefined Custom Elements](https://www.abeautifulsite.net/posts/flash-of-undefined-custom-elements/). The linked article describes some ways to alleviate it.
+
+<!-- prettier-ignore -->
+```html
+<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/@shoelace-style/shoelace@%VERSION%/dist/themes/light.css" />
+<script type="module" src="https://cdn.jsdelivr.net/npm/@shoelace-style/shoelace@%VERSION%/dist/shoelace-autoloader.js"></script>
+```
+
+</sl-tab-panel>
+
+<sl-tab-panel name="traditional">
+
+The traditional CDN loader registers all Shoelace elements up front. Note that, if you're only using a handful of components, it will be much more efficient to stick with the autoloader. However, you can also [cherry pick](#cherry-picking) components if you want to load specific ones up front.
 
 ```html
 <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/@shoelace-style/shoelace@%VERSION%/dist/themes/light.css" />
 <script type="module" src="https://cdn.jsdelivr.net/npm/@shoelace-style/shoelace@%VERSION%/dist/shoelace.js"></script>
 ```
 
-?> If you're only using a handful of components, it will be more efficient to [cherry pick](#cherry-picking) the ones you need.
+</sl-tab-panel>
+</sl-tab-group>
 
 ### Dark Theme
 
-If you prefer to use the [dark theme](/getting-started/themes#dark-theme) instead, use this code and add `<html class="sl-theme-dark">` to the page.
+The code above will load the light theme. If you want to use the [dark theme](/getting-started/themes#dark-theme) instead, update the stylesheet as shown below and add `<html class="sl-theme-dark">` to your page.
 
 ```html
 <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/@shoelace-style/shoelace@%VERSION%/dist/themes/dark.css" />
-<script type="module" src="https://cdn.jsdelivr.net/npm/@shoelace-style/shoelace@%VERSION%/dist/shoelace.js"></script>
 ```
 
 ### Light & Dark Theme
 
-If you want to load the light or dark theme based on the user's `prefers-color-scheme` setting, use this. The `media` attributes ensure that only the user's preferred theme stylesheet loads and the `onload` attribute sets the appropriate [theme class](/getting-started/themes) on the `<html>` element.
+If you want to load the light or dark theme based on the user's `prefers-color-scheme` setting, use the stylesheets below. The `media` attributes ensure that only the user's preferred theme stylesheet loads and the `onload` attribute sets the appropriate [theme class](/getting-started/themes) on the `<html>` element.
 
 ```html
 <link
@@ -40,7 +58,6 @@ If you want to load the light or dark theme based on the user's `prefers-color-s
   href="https://cdn.jsdelivr.net/npm/@shoelace-style/shoelace@%VERSION%/dist/themes/dark.css"
   onload="document.documentElement.classList.add('sl-theme-dark');"
 />
-<script type="module" src="https://cdn.jsdelivr.net/npm/@shoelace-style/shoelace@%VERSION%/dist/shoelace.js"></script>
 ```
 
 Now you can [start using Shoelace!](/getting-started/usage)
@@ -68,7 +85,7 @@ Alternatively, [you can use a bundler](#bundling).
 
 ## Setting the Base Path
 
-Some components rely on assets (icons, images, etc.) and Shoelace needs to know where they're located. For convenience, Shoelace will try to auto-detect the correct location based on the script you've loaded it from. This assumes assets are colocated with `shoelace.js` and will "just work" for most users.
+Some components rely on assets (icons, images, etc.) and Shoelace needs to know where they're located. For convenience, Shoelace will try to auto-detect the correct location based on the script you've loaded it from. This assumes assets are colocated with `shoelace.js` or `shoelace-autoloader.js` and will "just work" for most users.
 
 However, if you're [cherry picking](#cherry-picking) or [bundling](#bundling) Shoelace, you'll need to set the base path. You can do this one of two ways.
 
@@ -88,9 +105,7 @@ However, if you're [cherry picking](#cherry-picking) or [bundling](#bundling) Sh
 
 ## Cherry Picking
 
-The previous approach is the _easiest_ way to load Shoelace, but easy isn't always efficient. You'll incur the full size of the library even if you only use a handful of components. This is convenient for prototyping or if you're using most of the components, but it may result in longer load times in production. To improve this, you can cherry pick the components you need.
-
-Cherry picking can be done from your local install or [directly from the CDN](https://cdn.jsdelivr.net/npm/@shoelace-style/shoelace@%VERSION%/). This will limit the number of files the browser has to download and reduce the amount of bytes being transferred. The disadvantage is that you need to load components manually.
+Cherry picking can be done from [the CDN](#cdn-installation-easiest) or your [local installation](#local-installation). This approach will load only the components you need up front, while limiting the number of files the browser has to download. The disadvantage is that you need to import each individual component.
 
 Here's an example that loads only the button component. Again, if you're not using a module resolver, you'll need to adjust the path to point to the folder Shoelace is in.
 

docs/getting-started/overview.md

@@ -32,9 +32,10 @@ Designed in New Hampshire by [Cory LaViska](https://twitter.com/claviska).
 
 Add the following code to your page.
 
+<!-- prettier-ignore -->
 ```html
 <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/@shoelace-style/shoelace@%VERSION%/dist/themes/light.css" />
-<script type="module" src="https://cdn.jsdelivr.net/npm/@shoelace-style/shoelace@%VERSION%/dist/shoelace.js"></script>
+<script type="module" src="https://cdn.jsdelivr.net/npm/@shoelace-style/shoelace@%VERSION%/dist/shoelace-autoloader.js"></script>
 ```
 
 Now you have access to all of Shoelace's components! Try adding a button:
@@ -43,7 +44,7 @@ Now you have access to all of Shoelace's components! Try adding a button:
 <sl-button>Click me</sl-button>
 ```
 
-?> This will load all of Shoelace's components, but you should probably only load the ones you're actually using. To learn how, or for other ways to install Shoelace, refer to the [installation instructions](getting-started/installation).
+?> This will activate Shoelace's experimental autoloader, which registers components on the fly as you use them. To learn more about it, or for other ways to install Shoelace, refer to the [installation instructions](getting-started/installation).
 
 ## New to Web Components?
 

docs/getting-started/usage.md

@@ -33,7 +33,9 @@ Refer to a component's documentation for a complete list of its properties.
 
 ## Events
 
-You can listen for standard events such as `click`, `mouseover`, etc. as you normally would. In addition, some components emit custom events. These work the same way as standard events, but are prefixed with `sl-` to prevent collisions with standard events and other libraries.
+You can listen for standard events such as `click`, `mouseover`, etc. as you normally would. However, it's important to note that many events emitted within a component's shadow root will be [retargeted](https://dom.spec.whatwg.org/#retarget) to the host element. This may result in, for example, multiple `click` handlers executing even if the user clicks just once. Furthermore, `event.target` will point to the host element, making things even more confusing.
+
+As a result, you should almost always listen for custom events instead. For example, instead of listening to `click` to determine when an `<sl-checkbox>` gets toggled, listen to `sl-change`.
 
 ```html
 <sl-checkbox>Check me</sl-checkbox>
@@ -46,7 +48,7 @@ You can listen for standard events such as `click`, `mouseover`, etc. as you nor
 </script>
 ```
 
-Refer to a component's documentation for a complete list of its custom events.
+All custom events are prefixed with `sl-` to prevent collisions with standard events and other libraries. Refer to a component's documentation for a complete list of its custom events.
 
 ## Methods
 

docs/index.html

@@ -39,9 +39,9 @@
     <!-- Import Shoelace -->
     <link rel="stylesheet" href="/dist/themes/light.css" />
     <link rel="stylesheet" href="/dist/themes/dark.css" />
-    <script type="module" src="/dist/shoelace.js"></script>
+    <script type="module" src="/dist/shoelace-autoloader.js"></script>
   </head>
-  <body data-shoelace="/dist">
+  <body>
     <div id="app"></div>
     <script>
       // Set the initial theme to prevent flashing

docs/resources/changelog.md

@@ -6,15 +6,48 @@ Components with the <sl-badge variant="warning" pill>Experimental</sl-badge> bad
 
 New versions of Shoelace are released as-needed and generally occur when a critical mass of changes have accumulated. At any time, you can see what's coming in the next release by visiting [next.shoelace.style](https://next.shoelace.style).
 
+## 2.4.0
+
+- Added the `discover()` function to the experimental autoloader's exports [#1236](https://github.com/shoelace-style/shoelace/pull/1236)
+- Added the `size` attribute to `<sl-radio-group>` so labels and controls will be sized consistently [#1301](https://github.com/shoelace-style/shoelace/issues/1301)
+- Added tests for `<sl-animated-image>` [#1246](https://github.com/shoelace-style/shoelace/pull/1246)
+- Added tests for `<sl-animation>` [#1274](https://github.com/shoelace-style/shoelace/pull/1274)
+- Fixed a bug in `<sl-tree-item>` that prevented long labels from wrapping [#1243](https://github.com/shoelace-style/shoelace/issues/1243)
+- Fixed a bug in `<sl-tree-item>` that caused labels to be misaligned when text wraps [#1244](https://github.com/shoelace-style/shoelace/issues/1244)
+- Fixed an incorrect CSS property value in `<sl-checkbox>` [#1272](https://github.com/shoelace-style/shoelace/pull/1272)
+- Fixed a bug in `<sl-avatar>` that caused the initials to show up behind images with transparency [#1260](https://github.com/shoelace-style/shoelace/pull/1260)
+- Fixed a bug in `<sl-split-panel>` that prevented the divider from being focusable in some browsers [#1288](https://github.com/shoelace-style/shoelace/issues/1288)
+- Fixed a bug that caused `<sl-tab-group>` to affect scrolling when initializing [#1292](https://github.com/shoelace-style/shoelace/issues/1292)
+- Fixed a bug in `<sl-menu-item>` that allowed the hover state to show when focused [#1282](https://github.com/shoelace-style/shoelace/issues/1282)
+- Fixed a bug in `<sl-carousel>` that prevented interactive elements from receiving clicks [#1262](https://github.com/shoelace-style/shoelace/issues/1262)
+- Fixed a bug in `<sl-input>` that caused `valueAsDate` and `valueAsNumber` to not be set synchronously in some cases [#1302](https://github.com/shoelace-style/shoelace/issues/1302)
+- Improved the behavior of `<sl-carousel>` when used inside a flex container [#1235](https://github.com/shoelace-style/shoelace/pull/1235)
+- Improved the behavior of `<sl-tree-item>` to support buttons and other interactive elements [#1234](https://github.com/shoelace-style/shoelace/issues/1234)
+- Improved the performance of `<sl-include>` to prevent an apparent memory leak in some browsers [#1284](https://github.com/shoelace-style/shoelace/pull/1284)
+- Improved the accessibility of `<sl-select>`, `<sl-split-panel>`, and `<sl-details>` by ensuring slots don't have roles [#1287](https://github.com/shoelace-style/shoelace/issues/1287)
+
+## 2.3.0
+
+- Added an experimental autoloader
+- Added the `subpath` argument to `getBasePath()` to make it easier to generate full paths to any file
+- Added `custom-elements.json` to package exports
+- Added `tag__base`, `tag__content`, `tag__remove-button`, `tag__remove-button__base` parts to `<sl-select>`
+- Fixed a bug in `<sl-rating>` that allowed the `sl-change` event to be emitted when disabled [#1220](https://github.com/shoelace-style/shoelace/issues/1220)
+- Fixed a regression in `<sl-input>` that caused `min` and `max` to stop working when `type="date"` [#1224](https://github.com/shoelace-style/shoelace/issues/1224)
+- Improved accessibility of `<sl-carousel>` [#1218](https://github.com/shoelace-style/shoelace/pull/1218)
+- Improved `<sl-option>` so it converts non-string values to strings for convenience [#1226](https://github.com/shoelace-style/shoelace/issues/1226)
+- Updated the docs to dogfood the autoloader
+
 ## 2.2.0
 
 - Added TypeScript types to all custom events [#1183](https://github.com/shoelace-style/shoelace/pull/1183)
 - Added the `svg` part to `<sl-icon>`
 - Added the `getForm()` method to all form controls [#1180](https://github.com/shoelace-style/shoelace/issues/1180)
+- Added the experimental carousel component [#851](https://github.com/shoelace-style/shoelace/pull/851)
 - Fixed a bug in `<sl-select>` that caused the display label to render incorrectly in Chrome after form validation [#1197](https://github.com/shoelace-style/shoelace/discussions/1197)
 - Fixed a bug in `<sl-input>` that prevented users from applying their own value for `autocapitalize`, `autocomplete`, and `autocorrect` when using `type="password` [#1205](https://github.com/shoelace-style/shoelace/issues/1205)
 - Fixed a bug in `<sl-tab-group>` that prevented scroll controls from showing when dynamically adding tabs [#1208](https://github.com/shoelace-style/shoelace/issues/1208)
-- Fixed a big in `<sl-input>` that caused the calendar icon to be clipped in Firefox [#1213](https://github.com/shoelace-style/shoelace/pull/1213)
+- Fixed a bug in `<sl-input>` that caused the calendar icon to be clipped in Firefox [#1213](https://github.com/shoelace-style/shoelace/pull/1213)
 - Fixed a bug in `<sl-tab>` that caused `sl-tab-show` to be emitted when activating the close button
 - Fixed a bug in `<sl-spinner>` that caused `--track-color` to be invisible with certain colors
 - Fixed a bug in `<sl-menu-item>` that caused the focus color to show when selecting menu items with a mouse or touch device

docs/resources/contributing.md

@@ -363,3 +363,26 @@ Avoid inlining SVG icons inside of templates. If a component requires an icon, m
 ```
 
 This will render the icons instantly whereas the default library will fetch them from a remote source. If an icon isn't available in the system library, you will need to add it to `library.system.ts`. Using the system library ensures that all icons load instantly and are customizable by users who wish to provide a custom resolver for the system library.
+
+### Writing tests
+
+What to test for a given component:
+
+- Start with a simple test that checks that the default version of the component still renders.
+- Add at least one accessibility test (The accessibility check only covers the parts of the DOM which are currently visible and rendered. Depending on the component, more than one accessibility test is required to cover all scenarios.):
+
+```ts
+const myComponent = await fixture<SlAlert>(html`<sl-my-component>SomeContent</sl-my-component>`);
+
+await expect(myComponent).to.be.accessible();
+```
+
+- Try to cover all features advertised in the component's description
+
+Guidelines for writing tests:
+
+- Each test should declare its own, hand crafted hml fixture for the component. Do not try to write one big component to match all tests. This helps keeping each test understandable in isolation.
+- Tests should not produce log lines. Note that sometimes this cannot be prevented as the test runner might log errors (e.g. 404s).
+- Try keeping the main test readable: Extract more complicated sets of selectors/commands/assertions into separate functions.
+- Try to aim testing the user facing features of the component instead of the internal workings of the component.
+- Group multiple tests for one feature into describe blocks.

package-lock.json

@@ -1,12 +1,12 @@
 {
   "name": "@shoelace-style/shoelace",
-  "version": "2.2.0",
+  "version": "2.4.0",
   "lockfileVersion": 2,
   "requires": true,
   "packages": {
     "": {
       "name": "@shoelace-style/shoelace",
-      "version": "2.2.0",
+      "version": "2.4.0",
       "license": "MIT",
       "dependencies": {
         "@ctrl/tinycolor": "^3.5.0",
@@ -56,7 +56,6 @@
         "lint-staged": "^13.1.0",
         "lunr": "^2.3.9",
         "npm-check-updates": "^16.6.2",
-        "open": "^8.4.0",
         "pascal-case": "^3.1.2",
         "plop": "^3.1.1",
         "prettier": "^2.8.2",

package.json

@@ -1,7 +1,7 @@
 {
   "name": "@shoelace-style/shoelace",
   "description": "A forward-thinking library of web components.",
-  "version": "2.2.0",
+  "version": "2.4.0",
   "homepage": "https://github.com/shoelace-style/shoelace",
   "author": "Cory LaViska",
   "license": "MIT",
@@ -14,6 +14,7 @@
       "types": "./dist/shoelace.d.ts",
       "import": "./dist/shoelace.js"
     },
+    "./dist/custom-elements.json": "./dist/custom-elements.json",
     "./dist/themes/*": "./dist/themes/*",
     "./dist/components/*": "./dist/components/*",
     "./dist/utilities/*": "./dist/utilities/*",
@@ -109,7 +110,6 @@
     "lint-staged": "^13.1.0",
     "lunr": "^2.3.9",
     "npm-check-updates": "^16.6.2",
-    "open": "^8.4.0",
     "pascal-case": "^3.1.2",
     "plop": "^3.1.1",
     "prettier": "^2.8.2",

scripts/build.js

@@ -7,7 +7,6 @@ import esbuild from 'esbuild';
 import fs from 'fs';
 import getPort, { portNumbers } from 'get-port';
 import { globby } from 'globby';
-import open from 'open';
 import copy from 'recursive-copy';
 
 const { bundle, copydir, dir, serve, types } = commandLineArgs([
@@ -51,6 +50,8 @@ fs.mkdirSync(outdir, { recursive: true });
         //
         // The whole shebang
         './src/shoelace.ts',
+        // The auto-loader
+        './src/shoelace-autoloader.ts',
         // Components
         ...(await globby('./src/components/**/!(*.(style|test)).ts')),
         // Translations
@@ -106,7 +107,6 @@ fs.mkdirSync(outdir, { recursive: true });
     deleteSync('docs/dist');
 
     const browserSyncConfig = {
-      open: false,
       startPath: '/',
       port,
       logLevel: 'silent',
@@ -120,6 +120,22 @@ fs.mkdirSync(outdir, { recursive: true });
         routes: {
           '/dist': './dist'
         }
+      },
+      //
+      // Suppress Chrome's document.write() warning
+      //
+      // More info: https://github.com/BrowserSync/browser-sync/issues/1600)
+      //
+      snippetOptions: {
+        rule: {
+          match: /<\/head>/u,
+          fn: (snippet, match) => {
+            const {
+              groups: { src }
+            } = /src='(?<src>[^']+)'/u.exec(snippet);
+            return `<script src="${src}" async></script>${match}`;
+          }
+        }
       }
     };
 
@@ -127,7 +143,6 @@ fs.mkdirSync(outdir, { recursive: true });
     bs.init(browserSyncConfig, () => {
       const url = `http://localhost:${port}`;
       console.log(chalk.cyan(`Launched the Shoelace dev server at ${url} 🥾\n`));
-      open(url);
     });
 
     // Rebuild and reload when source files change

src/components/animated-image/animated-image.test.ts

@@ -1,9 +1,70 @@
-import { expect, fixture, html } from '@open-wc/testing';
+import { clickOnElement } from '../../internal/test';
+import { expect, fixture, html, oneEvent } from '@open-wc/testing';
+import type SlAnimatedImage from './animated-image';
 
 describe('<sl-animated-image>', () => {
   it('should render a component', async () => {
-    const el = await fixture(html` <sl-animated-image></sl-animated-image> `);
+    const animatedImage = await fixture(html` <sl-animated-image></sl-animated-image> `);
 
-    expect(el).to.exist;
+    expect(animatedImage).to.exist;
+  });
+
+  it('should render be accessible', async () => {
+    const animatedImage = await fixture(html` <sl-animated-image></sl-animated-image> `);
+
+    await expect(animatedImage).to.be.accessible();
+  });
+
+  const files = ['docs/assets/images/walk.gif', 'docs/assets/images/tie.webp'];
+
+  files.forEach((file: string) => {
+    it(`should load a ${file} without errors`, async () => {
+      const animatedImage = await fixture<SlAnimatedImage>(html` <sl-animated-image></sl-animated-image> `);
+      let errorCount = 0;
+      oneEvent(animatedImage, 'sl-error').then(() => errorCount++);
+      await loadImage(animatedImage, file);
+
+      expect(errorCount).to.be.equal(0);
+    });
+
+    it(`should play ${file} on click`, async () => {
+      const animatedImage = await fixture<SlAnimatedImage>(html` <sl-animated-image></sl-animated-image> `);
+      await loadImage(animatedImage, file);
+
+      expect(animatedImage.play).not.to.be.true;
+
+      await clickOnElement(animatedImage);
+
+      expect(animatedImage.play).to.be.true;
+    });
+
+    it(`should pause and resume ${file} on click`, async () => {
+      const animatedImage = await fixture<SlAnimatedImage>(html` <sl-animated-image></sl-animated-image> `);
+      await loadImage(animatedImage, file);
+
+      animatedImage.play = true;
+
+      await clickOnElement(animatedImage);
+
+      expect(animatedImage.play).to.be.false;
+
+      await clickOnElement(animatedImage);
+
+      expect(animatedImage.play).to.be.true;
+    });
+  });
+
+  it('should emit an error event on invalid url', async () => {
+    const animatedImage = await fixture<SlAnimatedImage>(html` <sl-animated-image></sl-animated-image> `);
+
+    const errorPromise = oneEvent(animatedImage, 'sl-error');
+    animatedImage.src = 'completelyWrong';
+
+    await errorPromise;
   });
 });
+async function loadImage(animatedImage: SlAnimatedImage, file: string) {
+  const loadingPromise = oneEvent(animatedImage, 'sl-load');
+  animatedImage.src = file;
+  await loadingPromise;
+}

src/components/animation/animation.test.ts

@@ -0,0 +1,81 @@
+import { aTimeout, expect, fixture, html, oneEvent } from '@open-wc/testing';
+import type SlAnimation from './animation';
+
+describe('<sl-animation>', () => {
+  const boxToAnimate = html`<div style="width: 10px; height: 10px;" data-testid="animated-box"></div>`;
+
+  it('renders', async () => {
+    const animationContainer = await fixture<SlAnimation>(html`<sl-animation>${boxToAnimate}</sl-animation>`);
+
+    expect(animationContainer).to.exist;
+  });
+
+  it('is accessible', async () => {
+    const animationContainer = await fixture<SlAnimation>(html`<sl-animation>${boxToAnimate}</sl-animation>`);
+
+    await expect(animationContainer).to.be.accessible();
+  });
+
+  describe('animation start', () => {
+    it('does not start the animation by default', async () => {
+      const animationContainer = await fixture<SlAnimation>(
+        html`<sl-animation name="bounce" easing="ease-in-out" duration="10">${boxToAnimate}</sl-animation>`
+      );
+      await aTimeout(0);
+
+      expect(animationContainer.play).to.be.false;
+    });
+
+    it('emits the correct event on animation start', async () => {
+      const animationContainer = await fixture<SlAnimation>(
+        html`<sl-animation name="bounce" easing="ease-in-out" duration="10">${boxToAnimate}</sl-animation>`
+      );
+
+      const startPromise = oneEvent(animationContainer, 'sl-start');
+      animationContainer.play = true;
+      return startPromise;
+    });
+  });
+
+  it('emits the correct event on animation end', async () => {
+    const animationContainer = await fixture<SlAnimation>(
+      html`<sl-animation name="bounce" easing="ease-in-out" duration="1">${boxToAnimate}</sl-animation>`
+    );
+
+    const endPromise = oneEvent(animationContainer, 'sl-finish');
+    animationContainer.iterations = 1;
+    animationContainer.play = true;
+    return endPromise;
+  });
+
+  it('can be finished by hand', async () => {
+    const animationContainer = await fixture<SlAnimation>(
+      html`<sl-animation name="bounce" easing="ease-in-out" duration="1000">${boxToAnimate}</sl-animation>`
+    );
+
+    const endPromise = oneEvent(animationContainer, 'sl-finish');
+    animationContainer.iterations = 1;
+    animationContainer.play = true;
+
+    await aTimeout(0);
+
+    animationContainer.finish();
+    return endPromise;
+  });
+
+  it('can be cancelled', async () => {
+    const animationContainer = await fixture<SlAnimation>(
+      html`<sl-animation name="bounce" easing="ease-in-out" duration="1">${boxToAnimate}</sl-animation>`
+    );
+    let animationHasFinished = false;
+    oneEvent(animationContainer, 'sl-finish').then(() => (animationHasFinished = true));
+    const cancelPromise = oneEvent(animationContainer, 'sl-cancel');
+    animationContainer.play = true;
+
+    await aTimeout(0);
+    animationContainer.cancel();
+
+    await cancelPromise;
+    expect(animationHasFinished).to.be.false;
+  });
+});

src/components/avatar/avatar.test.ts

@@ -1,5 +1,4 @@
-import { expect, fixture, html, waitUntil } from '@open-wc/testing';
-import sinon from 'sinon';
+import { aTimeout, expect, fixture, html, waitUntil } from '@open-wc/testing';
 import type SlAvatar from './avatar';
 
 // The default avatar background just misses AA contrast, but the next step up is way too dark. Since avatars aren't
@@ -73,6 +72,46 @@ describe('<sl-avatar>', () => {
     });
   });
 
+  describe('when image is present, the initials or icon part should not render', () => {
+    const initials = 'SL';
+    const image = 'data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7';
+    const label = 'Small transparent square';
+    before(async () => {
+      el = await fixture<SlAvatar>(
+        html`<sl-avatar image="${image}" label="${label}" initials="${initials}"></sl-avatar>`
+      );
+    });
+
+    it('should pass accessibility tests', async () => {
+      /**
+       * The image element itself is ancillary, because it's parent container contains the
+       * aria-label which dictates what "sl-avatar" is. This also implies that label text will
+       * resolve to "" when not provided and ignored by readers. This is why we use alt="" on
+       * the image element to pass accessibility.
+       * https://html.spec.whatwg.org/multipage/images.html#ancillary-images
+       */
+      await expect(el).to.be.accessible({ ignoredRules });
+    });
+
+    it('renders "image" part, with src and a role of presentation', () => {
+      const part = el.shadowRoot!.querySelector('[part~="image"]')!;
+
+      expect(part.getAttribute('src')).to.eq(image);
+    });
+
+    it('should not render the initials part', () => {
+      const part = el.shadowRoot!.querySelector<HTMLElement>('[part~="initials"]')!;
+
+      expect(part).to.not.exist;
+    });
+
+    it('should not render the icon part', () => {
+      const slot = el.shadowRoot!.querySelector<HTMLSlotElement>('slot[name=icon]')!;
+
+      expect(slot).to.not.exist;
+    });
+  });
+
   ['square', 'rounded', 'circle'].forEach(shape => {
     describe(`when passed a shape attribute ${shape}`, () => {
       before(async () => {
@@ -113,23 +152,20 @@ describe('<sl-avatar>', () => {
   });
 
   it('should not render the image when the image fails to load', async () => {
-    const errorHandler = sinon.spy();
-
     el = await fixture<SlAvatar>(html`<sl-avatar></sl-avatar>`);
-    el.addEventListener('error', errorHandler);
     el.image = 'bad_image';
-    waitUntil(() => errorHandler.calledOnce);
 
+    await aTimeout(0);
+
+    await waitUntil(() => el.shadowRoot!.querySelector('img') === null);
     expect(el.shadowRoot!.querySelector('img')).to.be.null;
   });
 
   it('should show a valid image after being passed an invalid image initially', async () => {
-    const errorHandler = sinon.spy();
-
     el = await fixture<SlAvatar>(html`<sl-avatar></sl-avatar>`);
-    el.addEventListener('error', errorHandler);
-    el.image = 'bad_image';
-    waitUntil(() => errorHandler.calledOnce);
+
+    await aTimeout(0);
+    await waitUntil(() => el.shadowRoot!.querySelector('img') === null);
 
     el.image = 'data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7';
     await el.updateComplete;

src/components/avatar/avatar.ts

@@ -52,6 +52,29 @@ export default class SlAvatar extends ShoelaceElement {
   }
 
   render() {
+    const avatarWithImage = html`
+      <img
+        part="image"
+        class="avatar__image"
+        src="${this.image}"
+        loading="${this.loading}"
+        alt=""
+        @error="${() => (this.hasError = true)}"
+      />
+    `;
+
+    let avatarWithoutImage = html``;
+
+    if (this.initials) {
+      avatarWithoutImage = html`<div part="initials" class="avatar__initials">${this.initials}</div>`;
+    } else {
+      avatarWithoutImage = html`
+        <slot name="icon" part="icon" class="avatar__icon" aria-hidden="true">
+          <sl-icon name="person-fill" library="system"></sl-icon>
+        </slot>
+      `;
+    }
+
     return html`
       <div
         part="base"
@@ -64,25 +87,7 @@ export default class SlAvatar extends ShoelaceElement {
         role="img"
         aria-label=${this.label}
       >
-        ${this.initials
-          ? html` <div part="initials" class="avatar__initials">${this.initials}</div> `
-          : html`
-              <slot name="icon" part="icon" class="avatar__icon" aria-hidden="true">
-                <sl-icon name="person-fill" library="system"></sl-icon>
-              </slot>
-            `}
-        ${this.image && !this.hasError
-          ? html`
-              <img
-                part="image"
-                class="avatar__image"
-                src="${this.image}"
-                loading="${this.loading}"
-                alt=""
-                @error="${() => (this.hasError = true)}"
-              />
-            `
-          : ''}
+        ${this.image && !this.hasError ? avatarWithImage : avatarWithoutImage}
       </div>
     `;
   }

src/components/carousel-item/carousel-item.ts

@@ -25,8 +25,7 @@ export default class SlCarouselItem extends ShoelaceElement {
 
   connectedCallback() {
     super.connectedCallback();
-    this.setAttribute('role', 'listitem');
-    this.setAttribute('aria-roledescription', 'slide');
+    this.setAttribute('role', 'group');
   }
 
   render() {

src/components/carousel/autoplay-controller.ts

@@ -8,6 +8,7 @@ export class AutoplayController implements ReactiveController {
   private host: ReactiveElement;
   private timerId = 0;
   private tickCallback: () => void;
+  private activeInteractions = 0;
 
   paused = false;
   stopped = true;
@@ -57,12 +58,16 @@ export class AutoplayController implements ReactiveController {
   }
 
   pause = () => {
-    this.paused = true;
-    this.host.requestUpdate();
+    if (!this.activeInteractions++) {
+      this.paused = true;
+      this.host.requestUpdate();
+    }
   };
 
   resume = () => {
-    this.paused = false;
-    this.host.requestUpdate();
+    if (!--this.activeInteractions) {
+      this.paused = false;
+      this.host.requestUpdate();
+    }
   };
 }

src/components/carousel/carousel.styles.ts

@@ -28,8 +28,8 @@ export default css`
 
   .carousel__pagination {
     grid-area: pagination;
-
     display: flex;
+    flex-wrap: wrap;
     justify-content: center;
     gap: var(--sl-spacing-small);
   }
@@ -46,6 +46,7 @@ export default css`
     overscroll-behavior-x: contain;
     scrollbar-width: none;
     aspect-ratio: calc(var(--aspect-ratio) * var(--slides-per-page));
+    border-radius: var(--sl-border-radius-small);
 
     --slide-size: calc((100% - (var(--slides-per-page) - 1) * var(--slide-gap)) / var(--slides-per-page));
   }
@@ -64,6 +65,7 @@ export default css`
     scroll-snap-type: x mandatory;
     scroll-padding-inline: var(--scroll-hint);
     padding-inline: var(--scroll-hint);
+    overflow-y: hidden;
   }
 
   .carousel__slides--vertical {
@@ -74,6 +76,7 @@ export default css`
     scroll-snap-type: y mandatory;
     scroll-padding-block: var(--scroll-hint);
     padding-block: var(--scroll-hint);
+    overflow-x: hidden;
   }
 
   .carousel__slides--dragging,
@@ -101,7 +104,7 @@ export default css`
     align-items: center;
     background: none;
     border: none;
-    border-radius: var(--sl-border-radius-medium);
+    border-radius: var(--sl-border-radius-small);
     font-size: inherit;
     color: var(--sl-color-neutral-600);
     padding: var(--sl-spacing-x-small);
@@ -138,12 +141,20 @@ export default css`
     width: var(--sl-spacing-small);
     height: var(--sl-spacing-small);
     background-color: var(--sl-color-neutral-300);
-    will-change: transform;
-    transition: var(--sl-transition-fast) ease-in;
+    padding: 0;
+    margin: 0;
   }
 
   .carousel__pagination-item--active {
-    background-color: var(--sl-color-neutral-600);
+    background-color: var(--sl-color-neutral-700);
     transform: scale(1.2);
   }
+
+  /* Focus styles */
+  .carousel__slides:focus-visible,
+  .carousel__navigation-button:focus-visible,
+  .carousel__pagination-item:focus-visible {
+    outline: var(--sl-focus-ring);
+    outline-offset: var(--sl-focus-ring-offset);
+  }
 `;

src/components/carousel/carousel.test.ts

@@ -17,7 +17,7 @@ describe('<sl-carousel>', () => {
     // Assert
     expect(el).to.exist;
     expect(el).to.have.attribute('role', 'region');
-    expect(el).to.have.attribute('aria-roledescription', 'carousel');
+    expect(el).to.have.attribute('aria-label', 'Carousel');
     expect(el.shadowRoot!.querySelector('.carousel__navigation')).not.to.exist;
     expect(el.shadowRoot!.querySelector('.carousel__pagination')).not.to.exist;
   });
@@ -78,6 +78,34 @@ describe('<sl-carousel>', () => {
       // Assert
       expect(el.next).not.to.have.been.called;
     });
+
+    it('should not resume if the user is still interacting', async () => {
+      // Arrange
+      const el = await fixture<SlCarousel>(html`
+        <sl-carousel autoplay autoplay-interval="10">
+          <sl-carousel-item>Node 1</sl-carousel-item>
+          <sl-carousel-item>Node 2</sl-carousel-item>
+          <sl-carousel-item>Node 3</sl-carousel-item>
+        </sl-carousel>
+      `);
+      sinon.stub(el, 'next');
+
+      await el.updateComplete;
+
+      // Act
+      el.dispatchEvent(new Event('mouseenter'));
+      el.dispatchEvent(new Event('focusin'));
+      await el.updateComplete;
+
+      el.dispatchEvent(new Event('mouseleave'));
+      await el.updateComplete;
+
+      clock.next();
+      clock.next();
+
+      // Assert
+      expect(el.next).not.to.have.been.called;
+    });
   });
 
   describe('when `loop` attribute is provided', () => {
@@ -511,7 +539,6 @@ describe('<sl-carousel>', () => {
 
       // Assert
       expect(el.scrollContainer).to.have.attribute('aria-busy', 'false');
-      expect(el.scrollContainer).to.have.attribute('aria-live', 'polite');
       expect(el.scrollContainer).to.have.attribute('aria-atomic', 'true');
 
       expect(pagination).to.have.attribute('role', 'tablist');
@@ -557,45 +584,5 @@ describe('<sl-carousel>', () => {
         expect(el.scrollContainer).to.have.attribute('aria-busy', 'false');
       });
     });
-
-    describe('when autoplay is active', () => {
-      it('should disable live announcement', async () => {
-        // Arrange
-        const el = await fixture<SlCarousel>(html`
-          <sl-carousel autoplay>
-            <sl-carousel-item>Node 1</sl-carousel-item>
-            <sl-carousel-item>Node 2</sl-carousel-item>
-            <sl-carousel-item>Node 3</sl-carousel-item>
-          </sl-carousel>
-        `);
-
-        await el.updateComplete;
-
-        // Assert
-        expect(el.scrollContainer).to.have.attribute('aria-live', 'off');
-      });
-
-      describe('and user is interacting with the carousel', () => {
-        it('should enable live announcement', async () => {
-          // Arrange
-          const el = await fixture<SlCarousel>(html`
-            <sl-carousel autoplay>
-              <sl-carousel-item>Node 1</sl-carousel-item>
-              <sl-carousel-item>Node 2</sl-carousel-item>
-              <sl-carousel-item>Node 3</sl-carousel-item>
-            </sl-carousel>
-          `);
-
-          await el.updateComplete;
-
-          // Act
-          el.dispatchEvent(new Event('focusin'));
-          await el.updateComplete;
-
-          // Assert
-          expect(el.scrollContainer).to.have.attribute('aria-live', 'polite');
-        });
-      });
-    });
   });
 });

src/components/carousel/carousel.ts

@@ -10,7 +10,6 @@ import { prefersReducedMotion } from '../../internal/animate';
 import { range } from 'lit/directives/range.js';
 import { ScrollController } from './scroll-controller';
 import { watch } from '../../internal/watch';
-import { when } from 'lit/directives/when.js';
 import ShoelaceElement from '../../internal/shoelace-element';
 import SlCarouselItem from '../carousel-item/carousel-item';
 import styles from './carousel.styles';
@@ -19,7 +18,7 @@ import type { CSSResultGroup } from 'lit';
 /**
  * @summary Carousels display an arbitrary number of content slides along a horizontal or vertical axis.
  *
- * @since 2.0
+ * @since 2.2
  * @status experimental
  *
  * @dependency sl-icon
@@ -98,7 +97,7 @@ export default class SlCarousel extends ShoelaceElement {
   connectedCallback(): void {
     super.connectedCallback();
     this.setAttribute('role', 'region');
-    this.setAttribute('aria-roledescription', 'carousel');
+    this.setAttribute('aria-label', this.localize.term('carousel'));
 
     const intersectionObserver = new IntersectionObserver(
       (entries: IntersectionObserverEntry[]) => {
@@ -137,63 +136,61 @@ export default class SlCarousel extends ShoelaceElement {
     this.mutationObserver.observe(this, { childList: true, subtree: false });
   }
 
+  private getPageCount() {
+    return Math.ceil(this.getSlides().length / this.slidesPerPage);
+  }
+
+  private getCurrentPage() {
+    return Math.floor(this.activeSlide / this.slidesPerPage);
+  }
+
   private getSlides({ excludeClones = true }: { excludeClones?: boolean } = {}) {
     return [...this.slides].filter(slide => !excludeClones || !slide.hasAttribute('data-clone'));
   }
 
-  /**
-   * Move the carousel backward by `slides-per-move` slides.
-   *
-   * @param behavior - The behavior used for scrolling.
-   */
-  previous(behavior: ScrollBehavior = 'smooth') {
-    this.goToSlide(this.activeSlide - this.slidesPerMove, behavior);
-  }
+  private handleKeyDown(event: KeyboardEvent) {
+    if (['ArrowLeft', 'ArrowRight', 'ArrowUp', 'ArrowDown', 'Home', 'End'].includes(event.key)) {
+      const target = event.target as HTMLElement;
+      const isRtl = this.localize.dir() === 'rtl';
+      const isFocusInPagination = target.closest('[part~="pagination-item"]') !== null;
+      const isNext =
+        event.key === 'ArrowDown' || (!isRtl && event.key === 'ArrowRight') || (isRtl && event.key === 'ArrowLeft');
+      const isPrevious =
+        event.key === 'ArrowUp' || (!isRtl && event.key === 'ArrowLeft') || (isRtl && event.key === 'ArrowRight');
 
-  /**
-   * Move the carousel forward by `slides-per-move` slides.
-   *
-   * @param behavior - The behavior used for scrolling.
-   */
-  next(behavior: ScrollBehavior = 'smooth') {
-    this.goToSlide(this.activeSlide + this.slidesPerMove, behavior);
-  }
+      event.preventDefault();
 
-  /**
-   * Scrolls the carousel to the slide specified by `index`.
-   *
-   * @param index - The slide index.
-   * @param behavior - The behavior used for scrolling.
-   */
-  goToSlide(index: number, behavior: ScrollBehavior = 'smooth') {
-    const { slidesPerPage, loop } = this;
+      if (isPrevious) {
+        this.previous();
+      }
 
-    const slidesWithClones = this.getSlides({ excludeClones: false });
-    const normalizedIndex = clamp(index + (loop ? slidesPerPage : 0), 0, slidesWithClones.length - 1);
-    const slide = slidesWithClones[normalizedIndex];
+      if (isNext) {
+        this.next();
+      }
 
-    this.scrollContainer.scrollTo({
-      left: slide.offsetLeft,
-      top: slide.offsetTop,
-      behavior: prefersReducedMotion() ? 'auto' : behavior
-    });
-  }
+      if (event.key === 'Home') {
+        this.goToSlide(0);
+      }
 
-  handleSlotChange(mutations: MutationRecord[]) {
-    const needsInitialization = mutations.some(mutation =>
-      [...mutation.addedNodes, ...mutation.removedNodes].some(
-        node => SlCarouselItem.isCarouselItem(node) && !(node as HTMLElement).hasAttribute('data-clone')
-      )
-    );
+      if (event.key === 'End') {
+        this.goToSlide(this.getSlides().length - 1);
+      }
 
-    // Reinitialize the carousel if a carousel item has been added or removed
-    if (needsInitialization) {
-      this.initializeSlides();
-      this.requestUpdate();
+      if (isFocusInPagination) {
+        this.updateComplete.then(() => {
+          const activePaginationItem = this.shadowRoot?.querySelector<HTMLButtonElement>(
+            '[part~="pagination-item--active"]'
+          );
+
+          if (activePaginationItem) {
+            activePaginationItem.focus();
+          }
+        });
+      }
     }
   }
 
-  handleScrollEnd() {
+  private handleScrollEnd() {
     const slides = this.getSlides();
     const entries = [...this.intersectionObserverEntries.values()];
 
@@ -214,6 +211,20 @@ export default class SlCarousel extends ShoelaceElement {
     }
   }
 
+  private handleSlotChange(mutations: MutationRecord[]) {
+    const needsInitialization = mutations.some(mutation =>
+      [...mutation.addedNodes, ...mutation.removedNodes].some(
+        node => SlCarouselItem.isCarouselItem(node) && !(node as HTMLElement).hasAttribute('data-clone')
+      )
+    );
+
+    // Reinitialize the carousel if a carousel item has been added or removed
+    if (needsInitialization) {
+      this.initializeSlides();
+    }
+    this.requestUpdate();
+  }
+
   @watch('loop', { waitUntilFirstUpdate: true })
   @watch('slidesPerPage', { waitUntilFirstUpdate: true })
   initializeSlides() {
@@ -223,11 +234,12 @@ export default class SlCarousel extends ShoelaceElement {
     this.intersectionObserverEntries.clear();
 
     // Removes all the cloned elements from the carousel
-    this.getSlides({ excludeClones: false }).forEach(slide => {
+    this.getSlides({ excludeClones: false }).forEach((slide, index) => {
       intersectionObserver.unobserve(slide);
 
       slide.classList.remove('--in-view');
       slide.classList.remove('--is-active');
+      slide.setAttribute('aria-label', this.localize.term('slideNum', index + 1));
 
       if (slide.hasAttribute('data-clone')) {
         slide.remove();
@@ -307,85 +319,62 @@ export default class SlCarousel extends ShoelaceElement {
     this.scrollController.mouseDragging = this.mouseDragging;
   }
 
-  private renderPagination = () => {
+  /**
+   * Move the carousel backward by `slides-per-move` slides.
+   *
+   * @param behavior - The behavior used for scrolling.
+   */
+  previous(behavior: ScrollBehavior = 'smooth') {
+    this.goToSlide(this.activeSlide - this.slidesPerMove, behavior);
+  }
+
+  /**
+   * Move the carousel forward by `slides-per-move` slides.
+   *
+   * @param behavior - The behavior used for scrolling.
+   */
+  next(behavior: ScrollBehavior = 'smooth') {
+    this.goToSlide(this.activeSlide + this.slidesPerMove, behavior);
+  }
+
+  /**
+   * Scrolls the carousel to the slide specified by `index`.
+   *
+   * @param index - The slide index.
+   * @param behavior - The behavior used for scrolling.
+   */
+  goToSlide(index: number, behavior: ScrollBehavior = 'smooth') {
+    const { slidesPerPage, loop, scrollContainer } = this;
+
     const slides = this.getSlides();
-    const slidesCount = slides.length;
+    const slidesWithClones = this.getSlides({ excludeClones: false });
 
-    const { activeSlide, slidesPerPage } = this;
-    const pagesCount = Math.ceil(slidesCount / slidesPerPage);
-    const currentPage = Math.floor(activeSlide / slidesPerPage);
+    // Sets the next index without taking into account clones, if any.
+    const newActiveSlide = (index + slides.length) % slides.length;
+    this.activeSlide = newActiveSlide;
 
-    return html`
-      <nav part="pagination" role="tablist" class="carousel__pagination" aria-controls="scroll-container">
-        ${map(range(pagesCount), index => {
-          const isActive = index === currentPage;
-          return html`
-            <button
-              part="pagination-item ${isActive ? 'pagination-item--active' : ''}"
-              class="${classMap({
-                'carousel__pagination-item': true,
-                'carousel__pagination-item--active': isActive
-              })}"
-              aria-selected="${isActive ? 'true' : 'false'}"
-              aria-label="${this.localize.term('goToSlide', index + 1, pagesCount)}"
-              role="tab"
-              @click="${() => this.goToSlide(index * slidesPerPage)}"
-            ></button>
-          `;
-        })}
-      </nav>
-    `;
-  };
+    // Get the index of the next slide. For looping carousel it adds `slidesPerPage`
+    // to normalize the starting index in order to ignore the first nth clones.
+    const nextSlideIndex = clamp(index + (loop ? slidesPerPage : 0), 0, slidesWithClones.length - 1);
+    const nextSlide = slidesWithClones[nextSlideIndex];
 
-  private renderNavigation = () => {
-    const { loop, activeSlide } = this;
-    const slides = this.getSlides();
-    const slidesCount = slides.length;
-    const prevEnabled = loop || activeSlide > 0;
-    const nextEnabled = loop || activeSlide < slidesCount - 1;
-    const isLtr = this.localize.dir() === 'ltr';
+    const scrollContainerRect = scrollContainer.getBoundingClientRect();
+    const nextSlideRect = nextSlide.getBoundingClientRect();
 
-    return html`
-      <nav part="navigation" class="carousel__navigation">
-        <button
-          @click="${prevEnabled ? () => this.previous() : null}"
-          aria-disabled="${prevEnabled ? 'false' : 'true'}"
-          aria-controls="scroll-container"
-          class="${classMap({
-            'carousel__navigation-button': true,
-            'carousel__navigation-button--previous': true,
-            'carousel__navigation-button--disabled': !prevEnabled
-          })}"
-          aria-label="${this.localize.term('previousSlide')}"
-          part="navigation-button navigation-button--previous"
-        >
-          <slot name="previous-icon">
-            <sl-icon library="system" name="${isLtr ? 'chevron-left' : 'chevron-right'}"></sl-icon>
-          </slot>
-        </button>
-
-        <button
-          @click="${nextEnabled ? () => this.next() : null}"
-          aria-disabled="${nextEnabled ? 'false' : 'true'}"
-          aria-controls="scroll-container"
-          class="${classMap({
-            'carousel__navigation-button': true,
-            'carousel__navigation-button--next': true,
-            'carousel__navigation-button--disabled': !nextEnabled
-          })}"
-          aria-label="${this.localize.term('nextSlide')}"
-          part="navigation-button navigation-button--next"
-        >
-          <slot name="next-icon">
-            <sl-icon library="system" name="${isLtr ? 'chevron-right' : 'chevron-left'}"></sl-icon>
-          </slot>
-        </button>
-      </nav>
-    `;
-  };
+    scrollContainer.scrollTo({
+      left: nextSlideRect.left - scrollContainerRect.left + scrollContainer.scrollLeft,
+      top: nextSlideRect.top - scrollContainerRect.top + scrollContainer.scrollTop,
+      behavior: prefersReducedMotion() ? 'auto' : behavior
+    });
+  }
 
   render() {
-    const { autoplayController, scrollController } = this;
+    const { scrollController, slidesPerPage } = this;
+    const pagesCount = this.getPageCount();
+    const currentPage = this.getCurrentPage();
+    const prevEnabled = this.loop || currentPage > 0;
+    const nextEnabled = this.loop || currentPage < pagesCount - 1;
+    const isLtr = this.localize.dir() === 'ltr';
 
     return html`
       <div part="base" class="carousel">
@@ -397,18 +386,79 @@ export default class SlCarousel extends ShoelaceElement {
             'carousel__slides--horizontal': this.orientation === 'horizontal',
             'carousel__slides--vertical': this.orientation === 'vertical'
           })}"
-          @scrollend="${this.handleScrollEnd}"
-          role="list"
-          tabindex="0"
           style="--slides-per-page: ${this.slidesPerPage};"
-          aria-live="${!autoplayController.stopped && !autoplayController.paused ? 'off' : 'polite'}"
           aria-busy="${scrollController.scrolling ? 'true' : 'false'}"
           aria-atomic="true"
+          tabindex="0"
+          @keydown=${this.handleKeyDown}
+          @scrollend=${this.handleScrollEnd}
         >
           <slot></slot>
         </div>
 
-        ${when(this.navigation, this.renderNavigation)} ${when(this.pagination, this.renderPagination)}
+        ${this.navigation
+          ? html`
+              <div part="navigation" class="carousel__navigation">
+                <button
+                  part="navigation-button navigation-button--previous"
+                  class="${classMap({
+                    'carousel__navigation-button': true,
+                    'carousel__navigation-button--previous': true,
+                    'carousel__navigation-button--disabled': !prevEnabled
+                  })}"
+                  aria-label="${this.localize.term('previousSlide')}"
+                  aria-controls="scroll-container"
+                  aria-disabled="${prevEnabled ? 'false' : 'true'}"
+                  @click=${prevEnabled ? () => this.previous() : null}
+                >
+                  <slot name="previous-icon">
+                    <sl-icon library="system" name="${isLtr ? 'chevron-left' : 'chevron-right'}"></sl-icon>
+                  </slot>
+                </button>
+
+                <button
+                  part="navigation-button navigation-button--next"
+                  class=${classMap({
+                    'carousel__navigation-button': true,
+                    'carousel__navigation-button--next': true,
+                    'carousel__navigation-button--disabled': !nextEnabled
+                  })}
+                  aria-label="${this.localize.term('nextSlide')}"
+                  aria-controls="scroll-container"
+                  aria-disabled="${nextEnabled ? 'false' : 'true'}"
+                  @click=${nextEnabled ? () => this.next() : null}
+                >
+                  <slot name="next-icon">
+                    <sl-icon library="system" name="${isLtr ? 'chevron-right' : 'chevron-left'}"></sl-icon>
+                  </slot>
+                </button>
+              </div>
+            `
+          : ''}
+        ${this.pagination
+          ? html`
+              <div part="pagination" role="tablist" class="carousel__pagination" aria-controls="scroll-container">
+                ${map(range(pagesCount), index => {
+                  const isActive = index === currentPage;
+                  return html`
+                    <button
+                      part="pagination-item ${isActive ? 'pagination-item--active' : ''}"
+                      class="${classMap({
+                        'carousel__pagination-item': true,
+                        'carousel__pagination-item--active': isActive
+                      })}"
+                      role="tab"
+                      aria-selected="${isActive ? 'true' : 'false'}"
+                      aria-label="${this.localize.term('goToSlide', index + 1, pagesCount)}"
+                      tabindex=${isActive ? '0' : '-1'}
+                      @click=${() => this.goToSlide(index * slidesPerPage)}
+                      @keydown=${this.handleKeyDown}
+                    ></button>
+                  `;
+                })}
+              </div>
+            `
+          : ''}
       </div>
     `;
   }

src/components/carousel/scroll-controller.ts

@@ -69,6 +69,7 @@ export class ScrollController<T extends ScrollHost> implements ReactiveControlle
   @debounce(100)
   handleScrollEnd() {
     if (!this.pointers.size) {
+      // If no pointer is active in the scroll area then the scroll has ended
       this.scrolling = false;
       this.host.scrollContainer.dispatchEvent(
         new CustomEvent('scrollend', {
@@ -77,6 +78,9 @@ export class ScrollController<T extends ScrollHost> implements ReactiveControlle
         })
       );
       this.host.requestUpdate();
+    } else {
+      // otherwise let's wait a bit more
+      this.handleScrollEnd();
     }
   }
 
@@ -85,35 +89,33 @@ export class ScrollController<T extends ScrollHost> implements ReactiveControlle
       return;
     }
 
-    const scrollContainer = this.host.scrollContainer;
     this.pointers.add(event.pointerId);
-    scrollContainer.setPointerCapture(event.pointerId);
 
-    if (this.mouseDragging && this.pointers.size === 1) {
+    const canDrag = this.mouseDragging && !this.dragging && event.button === 0;
+    if (canDrag) {
       event.preventDefault();
-      scrollContainer.addEventListener('pointermove', this.handlePointerMove);
+
+      this.host.scrollContainer.addEventListener('pointermove', this.handlePointerMove);
     }
   }
 
   handlePointerMove(event: PointerEvent) {
-    const host = this.host;
-    const scrollContainer = host.scrollContainer;
-
-    if (scrollContainer.hasPointerCapture(event.pointerId)) {
-      if (!this.dragging) {
-        this.handleDragStart();
-      }
+    const scrollContainer = this.host.scrollContainer;
 
+    const hasMoved = !!event.movementX || !!event.movementY;
+    if (!this.dragging && hasMoved) {
+      // Start dragging if it hasn't yet
+      scrollContainer.setPointerCapture(event.pointerId);
+      this.handleDragStart();
+    } else if (scrollContainer.hasPointerCapture(event.pointerId)) {
+      // Ignore pointers that we are not tracking
       this.handleDrag(event);
     }
   }
 
   handlePointerUp(event: PointerEvent) {
-    const host = this.host;
-    const scrollContainer = host.scrollContainer;
-
     this.pointers.delete(event.pointerId);
-    scrollContainer.releasePointerCapture(event.pointerId);
+    this.host.scrollContainer.releasePointerCapture(event.pointerId);
 
     if (this.pointers.size === 0) {
       this.handleDragEnd();

src/components/checkbox/checkbox.styles.ts

@@ -11,7 +11,7 @@ export default css`
   .checkbox {
     position: relative;
     display: inline-flex;
-    align-items: top;
+    align-items: flex-start;
     font-family: var(--sl-input-font-family);
     font-weight: var(--sl-input-font-weight);
     color: var(--sl-input-label-color);

src/components/details/details.test.ts

@@ -6,6 +6,20 @@ import type SlHideEvent from '../../events/sl-hide';
 import type SlShowEvent from '../../events/sl-show';
 
 describe('<sl-details>', () => {
+  describe('accessibility', () => {
+    it('should be accessible when closed', async () => {
+      const details = await fixture<SlDetails>(html`<sl-details summary="Test"> Test text </sl-details>`);
+
+      await expect(details).to.be.accessible();
+    });
+
+    it('should be accessible when open', async () => {
+      const details = await fixture<SlDetails>(html`<sl-details open summary="Test">Test text</sl-details>`);
+
+      await expect(details).to.be.accessible();
+    });
+  });
+
   it('should be visible with the open attribute', async () => {
     const el = await fixture<SlDetails>(html`
       <sl-details open>

src/components/details/details.ts

@@ -170,7 +170,7 @@ export default class SlDetails extends ShoelaceElement {
           'details--rtl': isRtl
         })}
       >
-        <header
+        <div
           part="header"
           id="header"
           class="details__header"
@@ -192,10 +192,10 @@ export default class SlDetails extends ShoelaceElement {
               <sl-icon library="system" name=${isRtl ? 'chevron-left' : 'chevron-right'}></sl-icon>
             </slot>
           </span>
-        </header>
+        </div>
 
-        <div class="details__body">
-          <slot part="content" id="content" class="details__content" role="region" aria-labelledby="header"></slot>
+        <div class="details__body" role="region" aria-labelledby="header">
+          <slot part="content" id="content" class="details__content"></slot>
         </div>
       </div>
     `;

src/components/icon/icon.ts

@@ -1,14 +1,16 @@
 import { customElement, property, state } from 'lit/decorators.js';
 import { getIconLibrary, unwatchIcon, watchIcon } from './library';
-import { html } from 'lit';
-import { requestIcon } from './request';
-import { unsafeSVG } from 'lit/directives/unsafe-svg.js';
 import { watch } from '../../internal/watch';
 import ShoelaceElement from '../../internal/shoelace-element';
 import styles from './icon.styles';
 import type { CSSResultGroup } from 'lit';
 
+const CACHEABLE_ERROR = Symbol();
+const RETRYABLE_ERROR = Symbol();
+type SVGResult = SVGSVGElement | typeof RETRYABLE_ERROR | typeof CACHEABLE_ERROR;
+
 let parser: DOMParser;
+const iconCache = new Map<string, Promise<SVGResult>>();
 
 /**
  * @summary Icons are symbols that can be used to represent various options within an application.
@@ -25,7 +27,37 @@ let parser: DOMParser;
 export default class SlIcon extends ShoelaceElement {
   static styles: CSSResultGroup = styles;
 
-  @state() private svg = '';
+  /** Given a URL, this function returns the resulting SVG element or an appropriate error symbol. */
+  private static async resolveIcon(url: string): Promise<SVGResult> {
+    let fileData: Response;
+    try {
+      fileData = await fetch(url, { mode: 'cors' });
+      if (!fileData.ok) return fileData.status === 410 ? CACHEABLE_ERROR : RETRYABLE_ERROR;
+    } catch {
+      return RETRYABLE_ERROR;
+    }
+
+    try {
+      const div = document.createElement('div');
+      div.innerHTML = await fileData.text();
+
+      const svg = div.firstElementChild;
+      if (svg?.tagName?.toLowerCase() !== 'svg') return CACHEABLE_ERROR;
+
+      if (!parser) parser = new DOMParser();
+      const doc = parser.parseFromString(svg.outerHTML, 'text/html');
+
+      const svgEl = doc.body.querySelector('svg');
+      if (!svgEl) return CACHEABLE_ERROR;
+
+      svgEl.part.add('svg');
+      return document.adoptNode(svgEl);
+    } catch {
+      return CACHEABLE_ERROR;
+    }
+  }
+
+  @state() private svg: SVGElement | null = null;
 
   /** The name of the icon to draw. Available names depend on the icon library being used. */
   @property({ reflect: true }) name?: string;
@@ -87,46 +119,42 @@ export default class SlIcon extends ShoelaceElement {
     const library = getIconLibrary(this.library);
     const url = this.getUrl();
 
-    // Create an instance of the DOM parser. We do it here instead of top-level to support SSR while maintaining a
-    // single parser instance for optimal performance.
-    if (!parser) {
-      parser = new DOMParser();
+    if (!url) {
+      this.svg = null;
+      return;
     }
 
-    if (url) {
-      try {
-        const file = await requestIcon(url);
-        if (url !== this.getUrl()) {
-          // If the url has changed while fetching the icon, ignore this request
-          return;
-        } else if (file.ok) {
-          const doc = parser.parseFromString(file.svg, 'text/html');
-          const svgEl = doc.body.querySelector('svg');
+    let iconResolver = iconCache.get(url);
+    if (!iconResolver) {
+      iconResolver = SlIcon.resolveIcon(url);
+      iconCache.set(url, iconResolver);
+    }
 
-          if (svgEl !== null) {
-            svgEl.part.add('svg');
-            library?.mutator?.(svgEl);
-            this.svg = svgEl.outerHTML;
-            this.emit('sl-load');
-          } else {
-            this.svg = '';
-            this.emit('sl-error');
-          }
-        } else {
-          this.svg = '';
-          this.emit('sl-error');
-        }
-      } catch {
+    const svg = await iconResolver;
+    if (svg === RETRYABLE_ERROR) {
+      iconCache.delete(url);
+    }
+
+    if (url !== this.getUrl()) {
+      // If the url has changed while fetching the icon, ignore this request
+      return;
+    }
+
+    switch (svg) {
+      case RETRYABLE_ERROR:
+      case CACHEABLE_ERROR:
+        this.svg = null;
         this.emit('sl-error');
-      }
-    } else if (this.svg.length > 0) {
-      // If we can't resolve a URL and an icon was previously set, remove it
-      this.svg = '';
+        break;
+      default:
+        this.svg = svg.cloneNode(true) as SVGElement;
+        library?.mutator?.(this.svg);
+        this.emit('sl-load');
     }
   }
 
   render() {
-    return html` ${unsafeSVG(this.svg)} `;
+    return this.svg;
   }
 }
 

src/components/icon/library.default.ts

@@ -3,7 +3,7 @@ import type { IconLibrary } from './library';
 
 const library: IconLibrary = {
   name: 'default',
-  resolver: name => `${getBasePath()}/assets/icons/${name}.svg`
+  resolver: name => getBasePath(`assets/icons/${name}.svg`)
 };
 
 export default library;

src/components/icon/request.ts

@@ -1,42 +0,0 @@
-import { requestInclude } from '../include/request';
-
-type IconFile =
-  | {
-      ok: true;
-      status: number;
-      svg: string;
-    }
-  | {
-      ok: false;
-      status: number;
-      svg: null;
-    };
-
-interface IconFileUnknown {
-  ok: boolean;
-  status: number;
-  svg: string | null;
-}
-
-const iconFiles = new Map<string, IconFile>();
-
-export async function requestIcon(url: string): Promise<IconFile> {
-  if (iconFiles.has(url)) {
-    return iconFiles.get(url)!;
-  }
-  const fileData = await requestInclude(url);
-  const iconFileData: IconFileUnknown = {
-    ok: fileData.ok,
-    status: fileData.status,
-    svg: null
-  };
-  if (fileData.ok) {
-    const div = document.createElement('div');
-    div.innerHTML = fileData.html;
-    const svg = div.firstElementChild;
-    iconFileData.svg = svg?.tagName.toLowerCase() === 'svg' ? svg.outerHTML : '';
-  }
-
-  iconFiles.set(url, iconFileData as IconFile);
-  return iconFileData as IconFile;
-}

src/components/include/request.ts

@@ -4,20 +4,26 @@ interface IncludeFile {
   html: string;
 }
 
-const includeFiles = new Map<string, Promise<IncludeFile>>();
+const includeFiles = new Map<string, IncludeFile | Promise<IncludeFile>>();
 
 /** Fetches an include file from a remote source. Caching is enabled so the origin is only pinged once. */
 export function requestInclude(src: string, mode: 'cors' | 'no-cors' | 'same-origin' = 'cors'): Promise<IncludeFile> {
-  if (includeFiles.has(src)) {
-    return includeFiles.get(src)!;
+  const prev = includeFiles.get(src);
+  if (prev !== undefined) {
+    // Promise.resolve() transparently unboxes prev if it was a promise.
+    return Promise.resolve(prev);
   }
   const fileDataPromise = fetch(src, { mode: mode }).then(async response => {
-    return {
+    const res = {
       ok: response.ok,
       status: response.status,
       html: await response.text()
     };
+    // Replace the cached promise with its result to avoid having buggy browser Promises retain memory as mentioned in #1284 and #1249
+    includeFiles.set(src, res);
+    return res;
   });
+  // Cache the promise to only fetch() once per src
   includeFiles.set(src, fileDataPromise);
   return fileDataPromise;
 }

src/components/input/input.ts

@@ -144,10 +144,10 @@ export default class SlInput extends ShoelaceElement implements ShoelaceFormCont
   @property({ type: Number }) maxlength: number;
 
   /** The input's minimum value. Only applies to date and number input types. */
-  @property({ type: Number }) min: number;
+  @property() min: number | string;
 
   /** The input's maximum value. Only applies to date and number input types. */
-  @property({ type: Number }) max: number;
+  @property() max: number | string;
 
   /**
    * Specifies the granularity that the value must adhere to, or the special value `any` which means no stepping is
@@ -190,13 +190,20 @@ export default class SlInput extends ShoelaceElement implements ShoelaceFormCont
    */
   @property() inputmode: 'none' | 'text' | 'decimal' | 'numeric' | 'tel' | 'search' | 'email' | 'url';
 
+  //
+  // NOTE: We use an in-memory input for these getters/setters instead of the one in the template because the properties
+  // can be set before the component is rendered.
+  //
+
   /** Gets or sets the current value as a `Date` object. Returns `null` if the value can't be converted. */
   get valueAsDate() {
-    return this.input?.valueAsDate ?? null;
+    const input = document.createElement('input');
+    input.type = 'date';
+    input.value = this.value;
+    return input.valueAsDate;
   }
 
   set valueAsDate(newValue: Date | null) {
-    // We use an in-memory input instead of the one in the template because the property can be set before render
     const input = document.createElement('input');
     input.type = 'date';
     input.valueAsDate = newValue;
@@ -205,11 +212,13 @@ export default class SlInput extends ShoelaceElement implements ShoelaceFormCont
 
   /** Gets or sets the current value as a number. Returns `NaN` if the value can't be converted. */
   get valueAsNumber() {
-    return this.input?.valueAsNumber ?? parseFloat(this.value);
+    const input = document.createElement('input');
+    input.type = 'number';
+    input.value = this.value;
+    return input.valueAsNumber;
   }
 
   set valueAsNumber(newValue: number) {
-    // We use an in-memory input instead of the one in the template because the property can be set before render
     const input = document.createElement('input');
     input.type = 'number';
     input.valueAsNumber = newValue;

src/components/menu-item/menu-item.styles.ts

@@ -64,7 +64,7 @@ export default css`
     outline: none;
   }
 
-  :host(:hover:not([aria-disabled='true'])) .menu-item {
+  :host(:hover:not([aria-disabled='true'], :focus-visible)) .menu-item {
     background-color: var(--sl-color-neutral-100);
     color: var(--sl-color-neutral-1000);
   }

src/components/option/option.test.ts

@@ -41,4 +41,14 @@ describe('<sl-option>', () => {
 
     expect(slotChangeHandler).to.have.been.calledOnce;
   });
+
+  it('should convert non-string values to string', async () => {
+    const el = await fixture<SlOption>(html` <sl-option>Text</sl-option> `);
+
+    // @ts-expect-error - intentional
+    el.value = 10;
+    await el.updateComplete;
+
+    expect(el.value).to.equal('10');
+  });
 });

src/components/option/option.ts

@@ -92,6 +92,12 @@ export default class SlOption extends ShoelaceElement {
 
   @watch('value')
   handleValueChange() {
+    // Ensure the value is a string. This ensures the next line doesn't error and allows framework users to pass numbers
+    // instead of requiring them to cast the value to a string.
+    if (typeof this.value !== 'string') {
+      this.value = String(this.value);
+    }
+
     if (this.value.includes(' ')) {
       console.error(`Option values cannot include a space. All spaces have been replaced with underscores.`, this);
       this.value = this.value.replace(/ /g, '_');

src/components/qr-code/qr-code.ts

@@ -72,7 +72,7 @@ export default class SlQrCode extends ShoelaceElement {
         part="base"
         class="qr-code"
         role="img"
-        aria-label=${this.label.length > 0 ? this.label : this.value}
+        aria-label=${this.label?.length > 0 ? this.label : this.value}
         style=${styleMap({
           width: `${this.size}px`,
           height: `${this.size}px`

src/components/radio-button/radio-button.ts

@@ -51,7 +51,10 @@ export default class SlRadioButton extends ShoelaceElement {
   /** Disables the radio button. */
   @property({ type: Boolean, reflect: true }) disabled = false;
 
-  /** The radio button's size. */
+  /**
+   * The radio button's size. When used inside a radio group, the size will be determined by the radio group's size so
+   * this attribute can typically be omitted.
+   */
   @property({ reflect: true }) size: 'small' | 'medium' | 'large' = 'medium';
 
   /** Draws a pill-style radio button with rounded edges. */

src/components/radio-group/radio-group.test.ts

@@ -151,30 +151,30 @@ describe('<sl-radio-group>', () => {
       expect(radioGroup.hasAttribute('data-user-invalid')).to.be.false;
       expect(radioGroup.hasAttribute('data-user-valid')).to.be.false;
     });
-  });
 
-  it('should show a constraint validation error when setCustomValidity() is called', async () => {
-    const form = await fixture<HTMLFormElement>(html`
-      <form>
-        <sl-radio-group value="1">
-          <sl-radio id="radio-1" name="a" value="1"></sl-radio>
-          <sl-radio id="radio-2" name="a" value="2"></sl-radio>
-        </sl-radio-group>
-        <sl-button type="submit">Submit</sl-button>
-      </form>
-    `);
-    const button = form.querySelector('sl-button')!;
-    const radioGroup = form.querySelector<SlRadioGroup>('sl-radio-group')!;
-    const submitHandler = sinon.spy((event: SubmitEvent) => event.preventDefault());
+    it('should show a constraint validation error when setCustomValidity() is called', async () => {
+      const form = await fixture<HTMLFormElement>(html`
+        <form>
+          <sl-radio-group value="1">
+            <sl-radio id="radio-1" name="a" value="1"></sl-radio>
+            <sl-radio id="radio-2" name="a" value="2"></sl-radio>
+          </sl-radio-group>
+          <sl-button type="submit">Submit</sl-button>
+        </form>
+      `);
+      const button = form.querySelector('sl-button')!;
+      const radioGroup = form.querySelector<SlRadioGroup>('sl-radio-group')!;
+      const submitHandler = sinon.spy((event: SubmitEvent) => event.preventDefault());
 
-    // Submitting the form after setting custom validity should not trigger the handler
-    radioGroup.setCustomValidity('Invalid selection');
-    form.addEventListener('submit', submitHandler);
-    button.click();
+      // Submitting the form after setting custom validity should not trigger the handler
+      radioGroup.setCustomValidity('Invalid selection');
+      form.addEventListener('submit', submitHandler);
+      button.click();
 
-    await aTimeout(100);
+      await aTimeout(100);
 
-    expect(submitHandler).to.not.have.been.called;
+      expect(submitHandler).to.not.have.been.called;
+    });
   });
 });
 
@@ -252,6 +252,34 @@ describe('when submitting a form', () => {
   });
 });
 
+describe('when a size is applied', () => {
+  it('should apply the same size to all radios', async () => {
+    const radioGroup = await fixture<SlRadioGroup>(html`
+      <sl-radio-group size="large">
+        <sl-radio id="radio-1" value="1"></sl-radio>
+        <sl-radio id="radio-2" value="2"></sl-radio>
+      </sl-radio-group>
+    `);
+    const [radio1, radio2] = radioGroup.querySelectorAll('sl-radio')!;
+
+    expect(radio1.size).to.equal('large');
+    expect(radio2.size).to.equal('large');
+  });
+
+  it('should apply the same size to all radio buttons', async () => {
+    const radioGroup = await fixture<SlRadioGroup>(html`
+      <sl-radio-group size="large">
+        <sl-radio-button id="radio-1" value="1"></sl-radio-button>
+        <sl-radio-button id="radio-2" value="2"></sl-radio-button>
+      </sl-radio-group>
+    `);
+    const [radio1, radio2] = radioGroup.querySelectorAll('sl-radio-button')!;
+
+    expect(radio1.size).to.equal('large');
+    expect(radio2.size).to.equal('large');
+  });
+});
+
 describe('when the value changes', () => {
   it('should emit sl-change when toggled with the arrow keys', async () => {
     const radioGroup = await fixture<SlRadioGroup>(html`

src/components/radio-group/radio-group.ts

@@ -71,6 +71,9 @@ export default class SlRadioGroup extends ShoelaceElement implements ShoelaceFor
   /** The current value of the radio group, submitted as a name/value pair with form data. */
   @property({ reflect: true }) value = '';
 
+  /** The radio group's size. This size will be applied to all child radios and radio buttons. */
+  @property({ reflect: true }) size: 'small' | 'medium' | 'large' = 'medium';
+
   /**
    * By default, form controls are associated with the nearest containing `<form>` element. This attribute allows you
    * to place the form control outside of a form and associate it with the form that has this `id`. The form must be in
@@ -197,27 +200,40 @@ export default class SlRadioGroup extends ShoelaceElement implements ShoelaceFor
   }
 
   private handleSlotChange() {
-    const radios = this.getAllRadios();
+    if (customElements.get('sl-radio') || customElements.get('sl-radio-button')) {
+      const radios = this.getAllRadios();
 
-    radios.forEach(radio => (radio.checked = radio.value === this.value));
+      // Sync the checked state and size
+      radios.forEach(radio => {
+        radio.checked = radio.value === this.value;
+        radio.size = this.size;
+      });
 
-    this.hasButtonGroup = radios.some(radio => radio.tagName.toLowerCase() === 'sl-radio-button');
+      this.hasButtonGroup = radios.some(radio => radio.tagName.toLowerCase() === 'sl-radio-button');
+
+      if (!radios.some(radio => radio.checked)) {
+        if (this.hasButtonGroup) {
+          const buttonRadio = radios[0].shadowRoot?.querySelector('button');
+
+          if (buttonRadio) {
+            buttonRadio.tabIndex = 0;
+          }
+        } else {
+          radios[0].tabIndex = 0;
+        }
+      }
 
-    if (!radios.some(radio => radio.checked)) {
       if (this.hasButtonGroup) {
-        const buttonRadio = radios[0].shadowRoot!.querySelector('button')!;
-        buttonRadio.tabIndex = 0;
-      } else {
-        radios[0].tabIndex = 0;
-      }
-    }
+        const buttonGroup = this.shadowRoot?.querySelector('sl-button-group');
 
-    if (this.hasButtonGroup) {
-      const buttonGroup = this.shadowRoot?.querySelector('sl-button-group');
-
-      if (buttonGroup) {
-        buttonGroup.disableRole = true;
+        if (buttonGroup) {
+          buttonGroup.disableRole = true;
+        }
       }
+    } else {
+      // Rerun this handler when <sl-radio> or <sl-radio-button> is registered
+      customElements.whenDefined('sl-radio').then(() => this.handleSlotChange());
+      customElements.whenDefined('sl-radio-button').then(() => this.handleSlotChange());
     }
   }
 
@@ -304,7 +320,9 @@ export default class SlRadioGroup extends ShoelaceElement implements ShoelaceFor
         part="form-control"
         class=${classMap({
           'form-control': true,
-          'form-control--medium': true,
+          'form-control--small': this.size === 'small',
+          'form-control--medium': this.size === 'medium',
+          'form-control--large': this.size === 'large',
           'form-control--radio-group': true,
           'form-control--has-label': hasLabel,
           'form-control--has-help-text': hasHelpText

src/components/radio/radio.ts

@@ -36,7 +36,10 @@ export default class SlRadio extends ShoelaceElement {
   /** The radio's value. When selected, the radio group will receive this value. */
   @property() value: string;
 
-  /** The radio's size. */
+  /**
+   * The radio's size. When used inside a radio group, the size will be determined by the radio group's size so this
+   * attribute can typically be omitted.
+   */
   @property({ reflect: true }) size: 'small' | 'medium' | 'large' = 'medium';
 
   /** Disables the radio. */

src/components/range/range.ts

@@ -1,5 +1,5 @@
 import { classMap } from 'lit/directives/class-map.js';
-import { customElement, property, query, state } from 'lit/decorators.js';
+import { customElement, eventOptions, property, query, state } from 'lit/decorators.js';
 import { defaultValue } from '../../internal/default-value';
 import { FormControlController } from '../../internal/form';
 import { HasSlotController } from '../../internal/slot';
@@ -156,6 +156,7 @@ export default class SlRange extends ShoelaceElement implements ShoelaceFormCont
     this.emit('sl-focus');
   }
 
+  @eventOptions({ passive: true })
   private handleThumbDragStart() {
     this.hasTooltip = true;
   }

src/components/rating/rating.test.ts

@@ -79,6 +79,20 @@ describe('<sl-rating>', () => {
     expect(el.value).to.equal(1);
   });
 
+  it('should not emit sl-change when disabled', async () => {
+    const el = await fixture<SlRating>(html` <sl-rating value="5" disabled></sl-rating> `);
+    const lastSymbol = el.shadowRoot!.querySelector<HTMLSpanElement>('.rating__symbol:last-child')!;
+    const changeHandler = sinon.spy();
+
+    el.addEventListener('sl-change', changeHandler);
+
+    await clickOnElement(lastSymbol);
+    await el.updateComplete;
+
+    expect(changeHandler).to.not.have.been.called;
+    expect(el.value).to.equal(5);
+  });
+
   it('should not emit sl-change when the value is changed programmatically', async () => {
     const el = await fixture<SlRating>(html` <sl-rating label="Test" value="1"></sl-rating> `);
     el.addEventListener('sl-change', () => expect.fail('sl-change incorrectly emitted'));

src/components/rating/rating.ts

@@ -1,7 +1,7 @@
 import '../icon/icon';
 import { clamp } from '../../internal/math';
 import { classMap } from 'lit/directives/class-map.js';
-import { customElement, property, query, state } from 'lit/decorators.js';
+import { customElement, eventOptions, property, query, state } from 'lit/decorators.js';
 import { html } from 'lit';
 import { LocalizeController } from '../../utilities/localize';
 import { styleMap } from 'lit/directives/style-map.js';
@@ -89,6 +89,10 @@ export default class SlRating extends ShoelaceElement {
   }
 
   private handleClick(event: MouseEvent) {
+    if (this.disabled) {
+      return;
+    }
+
     this.setValue(this.getValueFromMousePosition(event));
     this.emit('sl-change');
   }
@@ -159,6 +163,7 @@ export default class SlRating extends ShoelaceElement {
     event.preventDefault();
   }
 
+  @eventOptions({ passive: true })
   private handleTouchMove(event: TouchEvent) {
     this.hoverValue = this.getValueFromTouchPosition(event);
   }

src/components/select/select.test.ts

@@ -8,15 +8,31 @@ import type SlOption from '../option/option';
 import type SlSelect from './select';
 
 describe('<sl-select>', () => {
-  it('should pass accessibility tests', async () => {
-    const el = await fixture<SlSelect>(html`
-      <sl-select label="Select one">
-        <sl-option value="option-1">Option 1</sl-option>
-        <sl-option value="option-2">Option 2</sl-option>
-        <sl-option value="option-3">Option 3</sl-option>
-      </sl-select>
-    `);
-    await expect(el).to.be.accessible();
+  describe('accessibility', () => {
+    it('should pass accessibility tests when closed', async () => {
+      const select = await fixture<SlSelect>(html`
+        <sl-select label="Select one">
+          <sl-option value="option-1">Option 1</sl-option>
+          <sl-option value="option-2">Option 2</sl-option>
+          <sl-option value="option-3">Option 3</sl-option>
+        </sl-select>
+      `);
+      await expect(select).to.be.accessible();
+    });
+
+    it('should pass accessibility tests when open', async () => {
+      const select = await fixture<SlSelect>(html`
+        <sl-select label="Select one">
+          <sl-option value="option-1">Option 1</sl-option>
+          <sl-option value="option-2">Option 2</sl-option>
+          <sl-option value="option-3">Option 3</sl-option>
+        </sl-select>
+      `);
+
+      await select.show();
+
+      await expect(select).to.be.accessible();
+    });
   });
 
   it('should be disabled with the disabled attribute', async () => {

src/components/select/select.ts

@@ -59,6 +59,10 @@ import type SlRemoveEvent from '../../events/sl-remove';
  * @csspart listbox - The listbox container where options are slotted.
  * @csspart tags - The container that houses option tags when `multiselect` is used.
  * @csspart tag - The individual tags that represent each multiselect option.
+ * @csspart tag__base - The tag's base part.
+ * @csspart tag__content - The tag's content part.
+ * @csspart tag__remove-button - The tag's remove button.
+ * @csspart tag__remove-button__base - The tag's remove button base part.
  * @csspart clear-button - The clear button.
  * @csspart expand-icon - The container that wraps the expand icon.
  */
@@ -433,18 +437,15 @@ export default class SlSelect extends ShoelaceElement implements ShoelaceFormCon
     const values: string[] = [];
 
     // Check for duplicate values in menu items
-    allOptions.forEach(option => {
-      if (values.includes(option.value)) {
-        console.error(
-          `An option with a duplicate value of "${option.value}" has been found in <sl-select>. All options must have unique values.`,
-          option
-        );
-      }
-      values.push(option.value);
-    });
+    if (customElements.get('sl-option')) {
+      allOptions.forEach(option => values.push(option.value));
 
-    // Select only the options that match the new value
-    this.setSelectedOptions(allOptions.filter(el => value.includes(el.value)));
+      // Select only the options that match the new value
+      this.setSelectedOptions(allOptions.filter(el => value.includes(el.value)));
+    } else {
+      // Rerun this handler when <sl-option> is registered
+      customElements.whenDefined('sl-option').then(() => this.handleDefaultSlotChange());
+    }
   }
 
   private handleTagRemove(event: SlRemoveEvent, option: SlOption) {
@@ -761,6 +762,12 @@ export default class SlSelect extends ShoelaceElement implements ShoelaceFormCon
                           return html`
                             <sl-tag
                               part="tag"
+                              exportparts="
+                                base:tag__base,
+                                content:tag__content,
+                                remove-button:tag__remove-button,
+                                remove-button__base:tag__remove-button__base
+                              "
                               ?pill=${this.pill}
                               size=${this.size}
                               removable
@@ -814,7 +821,7 @@ export default class SlSelect extends ShoelaceElement implements ShoelaceFormCon
               </slot>
             </div>
 
-            <slot
+            <div
               id="listbox"
               role="listbox"
               aria-expanded=${this.open ? 'true' : 'false'}
@@ -825,7 +832,9 @@ export default class SlSelect extends ShoelaceElement implements ShoelaceFormCon
               tabindex="-1"
               @mouseup=${this.handleOptionClick}
               @slotchange=${this.handleDefaultSlotChange}
-            ></slot>
+            >
+              <slot></slot>
+            </div>
           </sl-popup>
         </div>
 

src/components/split-panel/split-panel.test.ts

@@ -2,8 +2,17 @@ import { expect, fixture, html } from '@open-wc/testing';
 
 describe('<sl-split-panel>', () => {
   it('should render a component', async () => {
-    const el = await fixture(html` <sl-split-panel></sl-split-panel> `);
+    const splitPanel = await fixture(html` <sl-split-panel></sl-split-panel> `);
 
-    expect(el).to.exist;
+    expect(splitPanel).to.exist;
+  });
+
+  it('should be accessible', async () => {
+    const splitPanel = await fixture(html`<sl-split-panel>
+      <div slot="start">Start</div>
+      <div slot="end">End</div>
+    </sl-split-panel>`);
+
+    await expect(splitPanel).to.be.accessible();
   });
 });

src/components/split-panel/split-panel.ts

@@ -249,17 +249,21 @@ export default class SlSplitPanel extends ShoelaceElement {
     return html`
       <slot name="start" part="panel start" class="start"></slot>
 
-      <slot
-        name="divider"
+      <div
         part="divider"
         class="divider"
         tabindex=${ifDefined(this.disabled ? undefined : '0')}
         role="separator"
+        aria-valuenow=${this.position}
+        aria-valuemin="0"
+        aria-valuemax="100"
         aria-label=${this.localize.term('resize')}
         @keydown=${this.handleKeyDown}
         @mousedown=${this.handleDrag}
         @touchstart=${this.handleDrag}
-      ></slot>
+      >
+        <slot name="divider"></slot>
+      </div>
 
       <slot name="end" part="panel end" class="end"></slot>
     `;

src/components/tab-group/tab-group.ts

@@ -70,6 +70,11 @@ export default class SlTabGroup extends ShoelaceElement {
   @property({ attribute: 'no-scroll-controls', type: Boolean }) noScrollControls = false;
 
   connectedCallback() {
+    const whenAllDefined = Promise.allSettled([
+      customElements.whenDefined('sl-tab'),
+      customElements.whenDefined('sl-tab-panel')
+    ]);
+
     super.connectedCallback();
 
     this.resizeObserver = new ResizeObserver(() => {
@@ -89,20 +94,24 @@ export default class SlTabGroup extends ShoelaceElement {
       }
     });
 
+    // After the first update...
     this.updateComplete.then(() => {
       this.syncTabsAndPanels();
       this.mutationObserver.observe(this, { attributes: true, childList: true, subtree: true });
       this.resizeObserver.observe(this.nav);
 
-      // Set initial tab state when the tabs first become visible
-      const intersectionObserver = new IntersectionObserver((entries, observer) => {
-        if (entries[0].intersectionRatio > 0) {
-          this.setAriaLabels();
-          this.setActiveTab(this.getActiveTab() ?? this.tabs[0], { emitEvents: false });
-          observer.unobserve(entries[0].target);
-        }
+      // Wait for tabs and tab panels to be registered
+      whenAllDefined.then(() => {
+        // Set initial tab state when the tabs become visible
+        const intersectionObserver = new IntersectionObserver((entries, observer) => {
+          if (entries[0].intersectionRatio > 0) {
+            this.setAriaLabels();
+            this.setActiveTab(this.getActiveTab() ?? this.tabs[0], { emitEvents: false });
+            observer.unobserve(entries[0].target);
+          }
+        });
+        intersectionObserver.observe(this.tabGroup);
       });
-      intersectionObserver.observe(this.tabGroup);
     });
   }
 

src/components/tree-item/tree-item.styles.ts

@@ -26,7 +26,6 @@ export default css`
     color: var(--sl-color-neutral-700);
     cursor: pointer;
     user-select: none;
-    white-space: nowrap;
   }
 
   .tree-item__checkbox {
@@ -39,7 +38,7 @@ export default css`
     font-family: var(--sl-font-sans);
     font-size: var(--sl-font-size-medium);
     font-weight: var(--sl-font-weight-normal);
-    line-height: var(--sl-line-height-normal);
+    line-height: var(--sl-line-height-dense);
     letter-spacing: var(--sl-letter-spacing-normal);
   }
 
@@ -63,6 +62,7 @@ export default css`
     padding: var(--sl-spacing-x-small);
     width: 1rem;
     height: 1rem;
+    flex-shrink: 0;
     cursor: pointer;
   }
 

src/components/tree-item/tree-item.ts

@@ -263,12 +263,11 @@ export default class SlTreeItem extends ShoelaceElement {
                   ?disabled="${this.disabled}"
                   ?checked="${live(this.selected)}"
                   ?indeterminate="${this.indeterminate}"
-                >
-                  <slot class="tree-item__label" part="label"></slot>
-                </sl-checkbox>
-              `,
-            () => html` <slot class="tree-item__label" part="label"></slot> `
+                ></sl-checkbox>
+              `
           )}
+
+          <slot class="tree-item__label" part="label"></slot>
         </div>
 
         <slot

src/internal/form.ts

@@ -19,7 +19,7 @@ const reportValidityOverloads: WeakMap<HTMLFormElement, () => boolean> = new Wea
 // We store a Set of controls that users have interacted with. This allows us to determine the interaction state
 // without littering the DOM with additional data attributes.
 //
-const userInteractedControls: Set<ShoelaceFormControl> = new Set();
+const userInteractedControls: WeakSet<ShoelaceFormControl> = new WeakSet();
 
 //
 // We store a WeakMap of interactions for each form control so we can track when all conditions are met for validation.
@@ -271,7 +271,7 @@ export class FormControlController implements ReactiveController {
     el.requestUpdate();
   }
 
-  private doAction(type: 'submit' | 'reset', invoker?: HTMLInputElement | SlButton) {
+  private doAction(type: 'submit' | 'reset', submitter?: HTMLInputElement | SlButton) {
     if (this.form) {
       const button = document.createElement('button');
       button.type = type;
@@ -283,13 +283,13 @@ export class FormControlController implements ReactiveController {
       button.style.whiteSpace = 'nowrap';
 
       // Pass name, value, and form attributes through to the temporary button
-      if (invoker) {
-        button.name = invoker.name;
-        button.value = invoker.value;
+      if (submitter) {
+        button.name = submitter.name;
+        button.value = submitter.value;
 
         ['formaction', 'formenctype', 'formmethod', 'formnovalidate', 'formtarget'].forEach(attr => {
-          if (invoker.hasAttribute(attr)) {
-            button.setAttribute(attr, invoker.getAttribute(attr)!);
+          if (submitter.hasAttribute(attr)) {
+            button.setAttribute(attr, submitter.getAttribute(attr)!);
           }
         });
       }
@@ -306,15 +306,15 @@ export class FormControlController implements ReactiveController {
   }
 
   /** Resets the form, restoring all the control to their default value */
-  reset(invoker?: HTMLInputElement | SlButton) {
-    this.doAction('reset', invoker);
+  reset(submitter?: HTMLInputElement | SlButton) {
+    this.doAction('reset', submitter);
   }
 
   /** Submits the form, triggering validation and form data injection. */
-  submit(invoker?: HTMLInputElement | SlButton) {
+  submit(submitter?: HTMLInputElement | SlButton) {
     // Calling form.submit() bypasses the submit event and constraint validation. To prevent this, we can inject a
     // native submit button into the form, "click" it, then remove it to simulate a standard form submission.
-    this.doAction('submit', invoker);
+    this.doAction('submit', submitter);
   }
 
   /**

src/internal/scroll.ts

@@ -32,7 +32,7 @@ export function unlockBodyScrolling(lockingEl: HTMLElement) {
 
   if (locks.size === 0) {
     document.body.classList.remove('sl-scroll-lock');
-    document.body.style.removeProperty('--sl-scrollbar-width');
+    document.body.style.removeProperty('--sl-scroll-lock-size');
   }
 }
 

src/internal/shoelace-element.ts

@@ -105,8 +105,8 @@ export interface ShoelaceFormControl extends ShoelaceElement {
 
   // Constraint validation attributes
   pattern?: string;
-  min?: number | Date;
-  max?: number | Date;
+  min?: number | string | Date;
+  max?: number | string | Date;
   step?: number | 'any';
   required?: boolean;
   minlength?: number;

src/shoelace-autoloader.ts

@@ -0,0 +1,58 @@
+import { getBasePath } from './utilities/base-path';
+
+const observer = new MutationObserver(mutations => {
+  for (const { addedNodes } of mutations) {
+    for (const node of addedNodes) {
+      if (node.nodeType === Node.ELEMENT_NODE) {
+        discover(node as Element);
+      }
+    }
+  }
+});
+
+/**
+ * Checks a node for undefined elements and attempts to register them.
+ */
+export async function discover(root: Element | ShadowRoot) {
+  const rootTagName = root instanceof Element ? root.tagName.toLowerCase() : '';
+  const rootIsCustomElement = rootTagName?.includes('-');
+  const tags = [...root.querySelectorAll(':not(:defined)')]
+    .map(el => el.tagName.toLowerCase())
+    .filter(tag => tag.startsWith('sl-'));
+
+  // If the root element is an undefined custom element, add it to the list
+  if (rootIsCustomElement && !customElements.get(rootTagName)) {
+    tags.push(rootTagName);
+  }
+
+  // Make the list unique
+  const tagsToRegister = [...new Set(tags)];
+
+  await Promise.allSettled(tagsToRegister.map(tagName => register(tagName)));
+}
+
+/**
+ * Registers an element by tag name.
+ */
+function register(tagName: string): Promise<void> {
+  const tagWithoutPrefix = tagName.replace(/^sl-/i, '');
+  const path = getBasePath(`components/${tagWithoutPrefix}/${tagWithoutPrefix}.js`);
+
+  // If the element is already defined, there's nothing more to do
+  if (customElements.get(tagName)) {
+    return Promise.resolve();
+  }
+
+  // Register it
+  return new Promise((resolve, reject) => {
+    import(path)
+      .then(() => resolve())
+      .catch(() => reject(new Error(`Unable to automatically load<${tagName}> from ${path}`)));
+  });
+}
+
+// Initial discovery
+discover(document.body);
+
+// Listen for new undefined elements
+observer.observe(document.body, { subtree: true, childList: true });

src/translations/da.ts

@@ -6,6 +6,7 @@ const translation: Translation = {
   $name: 'Dansk',
   $dir: 'ltr',
 
+  carousel: 'Karrusel',
   clearEntry: 'Ryd indtastning',
   close: 'Luk',
   copy: 'Kopier',
@@ -27,6 +28,7 @@ const translation: Translation = {
   scrollToStart: 'Scroll til start',
   selectAColorFromTheScreen: 'Vælg en farve fra skærmen',
   showPassword: 'Vis adgangskode',
+  slideNum: slide => `Slide ${slide}`,
   toggleColorFormat: 'Skift farveformat'
 };
 

src/translations/de.ts

@@ -6,6 +6,7 @@ const translation: Translation = {
   $name: 'Deutsch',
   $dir: 'ltr',
 
+  carousel: 'Karussell',
   clearEntry: 'Eingabe löschen',
   close: 'Schließen',
   copy: 'Kopieren',
@@ -27,6 +28,7 @@ const translation: Translation = {
   scrollToStart: 'Zum Anfang scrollen',
   selectAColorFromTheScreen: 'Wähle eine Farbe vom Bildschirm',
   showPassword: 'Passwort anzeigen',
+  slideNum: slide => `Gleiten ${slide}`,
   toggleColorFormat: 'Farbformat umschalten'
 };
 

src/translations/en.ts

@@ -6,6 +6,7 @@ const translation: Translation = {
   $name: 'English',
   $dir: 'ltr',
 
+  carousel: 'Carousel',
   clearEntry: 'Clear entry',
   close: 'Close',
   copy: 'Copy',
@@ -27,6 +28,7 @@ const translation: Translation = {
   scrollToStart: 'Scroll to start',
   selectAColorFromTheScreen: 'Select a color from the screen',
   showPassword: 'Show password',
+  slideNum: slide => `Slide ${slide}`,
   toggleColorFormat: 'Toggle color format'
 };
 

src/translations/es.ts

@@ -6,6 +6,7 @@ const translation: Translation = {
   $name: 'Español',
   $dir: 'ltr',
 
+  carousel: 'Carrusel',
   clearEntry: 'Borrar entrada',
   close: 'Cerrar',
   copy: 'Copiar',
@@ -27,6 +28,7 @@ const translation: Translation = {
   scrollToStart: 'Desplazarse al inicio',
   selectAColorFromTheScreen: 'Seleccione un color de la pantalla',
   showPassword: 'Mostrar contraseña',
+  slideNum: slide => `Diapositiva ${slide}`,
   toggleColorFormat: 'Alternar formato de color'
 };
 

src/translations/fa.ts

@@ -6,6 +6,7 @@ const translation: Translation = {
   $name: 'فارسی',
   $dir: 'rtl',
 
+  carousel: 'چرخ فلک',
   clearEntry: 'پاک کردن ورودی',
   close: 'بستن',
   copy: 'رونوشت',
@@ -27,6 +28,7 @@ const translation: Translation = {
   scrollToStart: 'پیمایش به ابتدا',
   selectAColorFromTheScreen: 'انتخاب یک رنگ از صفحه نمایش',
   showPassword: 'نمایش رمز',
+  slideNum: slide => `اسلاید ${slide}`,
   toggleColorFormat: 'تغییر قالب رنگ'
 };
 

src/translations/fr.ts

@@ -6,6 +6,7 @@ const translation: Translation = {
   $name: 'Français',
   $dir: 'ltr',
 
+  carousel: 'Carrousel',
   clearEntry: `Effacer l'entrée`,
   close: 'Fermer',
   copy: 'Copier',
@@ -27,6 +28,7 @@ const translation: Translation = {
   scrollToStart: `Faire défiler jusqu'au début`,
   selectAColorFromTheScreen: `Sélectionnez une couleur à l'écran`,
   showPassword: 'Montrer le mot de passe',
+  slideNum: slide => `Diapositive ${slide}`,
   toggleColorFormat: 'Changer le format de couleur'
 };
 

src/translations/he.ts

@@ -6,6 +6,7 @@ const translation: Translation = {
   $name: 'עברית',
   $dir: 'rtl',
 
+  carousel: 'קרוסלה',
   clearEntry: 'נקה קלט',
   close: 'סגור',
   copy: 'העתק',
@@ -27,6 +28,7 @@ const translation: Translation = {
   scrollToStart: 'גלול להתחלה',
   selectAColorFromTheScreen: 'בחור צבע מהמסך',
   showPassword: 'הראה סיסמה',
+  slideNum: slide => `שקופית ${slide}`,
   toggleColorFormat: 'החלף פורמט צבע'
 };
 

src/translations/hu.ts

@@ -6,6 +6,7 @@ const translation: Translation = {
   $name: 'Magyar',
   $dir: 'ltr',
 
+  carousel: 'Körhinta',
   clearEntry: 'Bejegyzés törlése',
   close: 'Bezárás',
   copy: 'Másolás',
@@ -27,6 +28,7 @@ const translation: Translation = {
   scrollToStart: 'Görgessen az elejére',
   selectAColorFromTheScreen: 'Szín választása a képernyőről',
   showPassword: 'Jelszó megjelenítése',
+  slideNum: slide => `${slide}. dia`,
   toggleColorFormat: 'Színformátum változtatása'
 };
 

src/translations/ja.ts

@@ -6,6 +6,7 @@ const translation: Translation = {
   $name: '日本語',
   $dir: 'ltr',
 
+  carousel: 'カルーセル',
   clearEntry: 'クリアエントリ',
   close: '閉じる',
   copy: 'コピー',
@@ -27,6 +28,7 @@ const translation: Translation = {
   scrollToStart: '最初にスクロールする',
   selectAColorFromTheScreen: '画面から色を選択してください',
   showPassword: 'パスワードを表示',
+  slideNum: slide => `スライド ${slide}`,
   toggleColorFormat: '色のフォーマットを切り替える'
 };
 

src/translations/nl.ts

@@ -6,6 +6,7 @@ const translation: Translation = {
   $name: 'Nederlands',
   $dir: 'ltr',
 
+  carousel: 'Carrousel',
   clearEntry: 'Invoer wissen',
   close: 'Sluiten',
   copy: 'Kopiëren',
@@ -27,6 +28,7 @@ const translation: Translation = {
   scrollToStart: 'Scroll naar begin',
   selectAColorFromTheScreen: 'Selecteer een kleur van het scherm',
   showPassword: 'Laat wachtwoord zien',
+  slideNum: slide => `Schuif ${slide}`,
   toggleColorFormat: 'Wissel kleurnotatie'
 };
 

src/translations/pl.ts

@@ -6,6 +6,7 @@ const translation: Translation = {
   $name: 'Polski',
   $dir: 'ltr',
 
+  carousel: 'Karuzela',
   clearEntry: 'Wyczyść wpis',
   close: 'Zamknij',
   copy: 'Kopiuj',
@@ -27,6 +28,7 @@ const translation: Translation = {
   scrollToStart: 'Przewiń do początku',
   selectAColorFromTheScreen: 'Próbkuj z ekranu',
   showPassword: 'Pokaż hasło',
+  slideNum: slide => `Slajd ${slide}`,
   toggleColorFormat: 'Przełącz format'
 };
 

src/translations/pt.ts

@@ -6,6 +6,7 @@ const translation: Translation = {
   $name: 'Português',
   $dir: 'ltr',
 
+  carousel: 'Carrossel',
   clearEntry: 'Limpar entrada',
   close: 'Fechar',
   copy: 'Copiar',
@@ -27,6 +28,7 @@ const translation: Translation = {
   scrollToStart: 'Rolar até o começo',
   selectAColorFromTheScreen: 'Selecionar uma cor da tela',
   showPassword: 'Mostrar senhaShow password',
+  slideNum: slide => `Diapositivo ${slide}`,
   toggleColorFormat: 'Trocar o formato de cor'
 };
 

src/translations/ru.ts

@@ -6,6 +6,7 @@ const translation: Translation = {
   $name: 'Русский',
   $dir: 'ltr',
 
+  carousel: 'Карусель',
   clearEntry: 'Очистить запись',
   close: 'Закрыть',
   copy: 'Скопировать',
@@ -27,6 +28,7 @@ const translation: Translation = {
   scrollToStart: 'Пролистать к началу',
   selectAColorFromTheScreen: 'Выберите цвет на экране',
   showPassword: 'Показать пароль',
+  slideNum: slide => `Слайд ${slide}`,
   toggleColorFormat: 'Переключить цветовую модель'
 };
 

src/translations/sv.ts

@@ -6,6 +6,7 @@ const translation: Translation = {
   $name: 'Svenska',
   $dir: 'ltr',
 
+  carousel: 'Karusell',
   clearEntry: 'Återställ val',
   close: 'Stäng',
   copy: 'Kopiera',
@@ -27,6 +28,7 @@ const translation: Translation = {
   scrollToStart: 'Skrolla till början',
   selectAColorFromTheScreen: 'Välj en färg från skärmen',
   showPassword: 'Visa lösenord',
+  slideNum: slide => `Bild ${slide}`,
   toggleColorFormat: 'Växla färgformat'
 };
 

src/translations/tr.ts

@@ -6,6 +6,7 @@ const translation: Translation = {
   $name: 'Türkçe',
   $dir: 'ltr',
 
+  carousel: 'Atlıkarınca',
   clearEntry: 'Girişi sil',
   close: 'Kapat',
   copy: 'Kopya',
@@ -27,6 +28,7 @@ const translation: Translation = {
   scrollToStart: 'Başa kay',
   selectAColorFromTheScreen: 'Ekrandan bir renk seçin',
   showPassword: 'Şifreyi göster',
+  slideNum: slide => `Slayt ${slide}`,
   toggleColorFormat: 'Renk biçimini değiştir'
 };
 

src/translations/zh-tw.ts

@@ -6,6 +6,7 @@ const translation: Translation = {
   $name: '正體中文',
   $dir: 'ltr',
 
+  carousel: '旋轉木馬',
   clearEntry: '清空',
   close: '關閉',
   copy: '複製',
@@ -27,6 +28,7 @@ const translation: Translation = {
   scrollToStart: '捲至頁首',
   selectAColorFromTheScreen: '從螢幕中選擇一種顏色',
   showPassword: '顯示密碼',
+  slideNum: slide => `幻燈片 ${slide}`,
   toggleColorFormat: '切換顏色格式'
 };
 

src/utilities/base-path.ts

@@ -9,16 +9,18 @@ export function setBasePath(path: string) {
  * Gets the library's base path.
  *
  * The base path is used to load assets such as icons and images, so it needs to be set for components to work properly.
- * By default, this script will look for a script ending in shoelace.js and set the base path to the directory that
- * contains that file. To override this behavior, you can add the data-shoelace attribute to any script on the page
- * (it probably makes the most sense to attach it to the Shoelace script, but it could also be on a bundle). The value
- * can be a local folder or it can point to a CORS-enabled endpoint such as a CDN.
+ * By default, this script will look for a script ending in shoelace.js or shoelace-autoloader.js and set the base path
+ * to the directory that contains that file. To override this behavior, you can add the data-shoelace attribute to any
+ * script on the page (it probably makes the most sense to attach it to the Shoelace script, but it could also be on a
+ * bundle). The value can be a local folder or it can point to a CORS-enabled endpoint such as a CDN.
  *
  *   <script src="bundle.js" data-shoelace="/custom/base/path"></script>
  *
  * Alternatively, you can set the base path manually using the exported setBasePath() function.
+ *
+ * @param subpath - An optional path to append to the base path.
  */
-export function getBasePath() {
+export function getBasePath(subpath = '') {
   if (!basePath) {
     const scripts = [...document.getElementsByTagName('script')] as HTMLScriptElement[];
     const configScript = scripts.find(script => script.hasAttribute('data-shoelace'));
@@ -27,7 +29,9 @@ export function getBasePath() {
       // Use the data-shoelace attribute
       setBasePath(configScript.getAttribute('data-shoelace')!);
     } else {
-      const fallbackScript = scripts.find(s => /shoelace(\.min)?\.js($|\?)/.test(s.src));
+      const fallbackScript = scripts.find(s => {
+        return /shoelace(\.min)?\.js($|\?)/.test(s.src) || /shoelace-autoloader(\.min)?\.js($|\?)/.test(s.src);
+      });
       let path = '';
 
       if (fallbackScript) {
@@ -38,5 +42,6 @@ export function getBasePath() {
     }
   }
 
-  return basePath.replace(/\/$/, '');
+  // Return the base path without a trailing slash. If one exists, append the subpath separated by a slash.
+  return basePath.replace(/\/$/, '') + (subpath ? `/${subpath.replace(/^\//, '')}` : ``);
 }

src/utilities/localize.ts

@@ -13,6 +13,7 @@ export interface Translation extends DefaultTranslation {
   $name: string; // e.g. English, Español
   $dir: 'ltr' | 'rtl';
 
+  carousel: string;
   clearEntry: string;
   close: string;
   copy: string;
@@ -30,5 +31,6 @@ export interface Translation extends DefaultTranslation {
   scrollToStart: string;
   selectAColorFromTheScreen: string;
   showPassword: string;
+  slideNum: (slide: number) => string;
   toggleColorFormat: string;
 }

tsconfig.json

@@ -3,6 +3,7 @@
   "compilerOptions": {
     /* Visit https://aka.ms/tsconfig.json to read more about this file */
     "target": "es2017",
+    "module": "es2020",
     "lib": [
       "dom",
       "dom.Iterable",

web-test-runner.config.js

@@ -5,7 +5,7 @@ import { playwrightLauncher } from '@web/test-runner-playwright';
 export default {
   rootDir: '.',
   files: 'src/**/*.test.ts', // "default" group
-  concurrentBrowsers: 3,
+  concurrentBrowsers: 1,
   nodeResolve: true,
   testFramework: {
     config: {