fix link button events

docs/resources/changelog.md

@@ -17,6 +17,7 @@ _During the beta period, these restrictions may be relaxed in the event of a mis
 - Fixed a bug where using `sl-menu` inside a shadow root would break keyboard selections [#382](https://github.com/shoelace-style/shoelace/issues/382)
 - Fixed a bug where toggling `multiple` in `sl-select` would lead to a stale display label
 - Fixed a bug in `sl-tab-group` where changing `placement` could result in the active tab indicator being drawn a few pixels off
+- Fixed a bug in `sl-button` where link buttons threw an error on focus, blur, and click
 - Improved `@watch` decorator to run after update instead of during
 - Updated `sl-menu-item` checked icon to `check` instead of `check2`
 - Upgraded the status of `sl-resize-observer` from experimental to stable

src/components/button/button.ts

@@ -217,9 +217,9 @@ export default class SlButton extends LitElement {
         target=${ifDefined(this.target)}
         download=${ifDefined(this.download)}
         rel=${ifDefined(this.target ? 'noreferrer noopener' : undefined)}
-        onblur=${this.handleBlur}
+        @blur=${this.handleBlur}
-        onfocus=${this.handleFocus}
+        @focus=${this.handleFocus}
-        onclick=${this.handleClick}
+        @click=${this.handleClick}
       >
         ${interior}
       </a>