Fix spinner when <wa-tree-item> is lazy loaded (#1786)

* fix spinner when lazy; closes #1678

* remove redundant entry

packages/webawesome/docs/docs/resources/changelog.md

@@ -13,16 +13,15 @@ Components with the <wa-badge variant="warning">Experimental</wa-badge> badge sh
 
 ## Next
 
-- 🚨 BREAKING: Changed `appearance="filled outlined"` to `appearance="filled-outlined"` in `<wa-card>` [issue:1671]
 - Fixed a bug in `<wa-slider>` that caused some touch devices to end up with the incorrect value [issue:1703]
 - Fixed a bug in `<wa-card>` that prevented some slots from being detected correctly [discuss:1450]
+- Fixed a bug in `<wa-tree-item>` that caused the spinner to not show when lazy loading [issue:1678]
 - Fixed a bug in `<wa-dropdown>` that caused the browser to hang when cancelling the `wa-hide` event [issue:1483]
 - Improved performance of `<wa-icon>` so initial rendering occurs faster, especially with multiple icons on the page [issue:1729]
 
 ## 3.0.0
 
 - 🚨 BREAKING: Changed `appearance="filled outlined"` to `appearance="filled-outlined"` in the following elements [issue:1127]
-  - `<wa-badge>`
   - `<wa-button>`
   - `<wa-callout>`
   - `<wa-card>`

packages/webawesome/src/components/tree-item/tree-item.css

@@ -73,12 +73,16 @@ slot:not([name])::slotted(wa-icon) {
   rotate: -90deg;
 }
 
-.tree-item-expanded slot[name='expand-icon'],
+.tree-item-expanded:not(.tree-item-loading) slot[name='expand-icon'],
 .tree-item:not(.tree-item-expanded) slot[name='collapse-icon'] {
   display: none;
 }
 
-.tree-item:not(.tree-item-has-expand-button) .expand-icon-slot {
+.tree-item:not(.tree-item-has-expand-button):not(.tree-item-loading) .expand-icon-slot {
+  display: none;
+}
+
+.tree-item-loading .expand-icon-slot wa-icon {
   display: none;
 }
 

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

@@ -254,6 +254,7 @@ export default class WaTreeItem extends WebAwesomeElement {
           'tree-item-expanded': this.expanded,
           'tree-item-selected': this.selected,
           'tree-item-leaf': this.isLeaf,
+          'tree-item-loading': this.loading,
           'tree-item-has-expand-button': showExpandButton,
         })}"
       >
@@ -272,8 +273,10 @@ export default class WaTreeItem extends WebAwesomeElement {
               ${when(
                 this.loading,
                 () => html` <wa-spinner part="spinner" exportparts="base:spinner__base"></wa-spinner> `,
-              )}
+                () => html`
                   <wa-icon name=${isRtl ? 'chevron-left' : 'chevron-right'} library="system" variant="solid"></wa-icon>
+                `,
+              )}
             </slot>
             <slot class="expand-icon-slot" name="collapse-icon">
               <wa-icon name=${isRtl ? 'chevron-left' : 'chevron-right'} library="system" variant="solid"></wa-icon>