fixes #876

docs/resources/changelog.md

@@ -11,6 +11,7 @@ _During the beta period, these restrictions may be relaxed in the event of a mis
 ## Next
 
 - Fixed a bug in `<sl-popup>` that didn't account for the arrow's diagonal size
+- Fixed a bug in `<sl-tree-item>` that prevented custom expand/collapse icons from rendering
 
 ## 2.0.0-beta.82
 

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

@@ -234,7 +234,7 @@ export default class SlTreeItem extends ShoelaceElement {
             ${when(
               showExpandButton,
               () => html`
-                <slot name="${this.expanded ? 'expanded-icon' : 'collapsed-icon'}">
+                <slot name="${this.expanded ? 'expand-icon' : 'collapse-icon'}">
                   <sl-icon
                     library="system"
                     name="${this.expanded ? 'chevron-down' : isRtl ? 'chevron-left' : 'chevron-right'}"