feat(header-search): pass index as a slot prop

src/UIShell/HeaderSearch.svelte

@@ -5,6 +5,7 @@
    * @event {any} inactive
    * @event {any} clear
    * @event {{ value: string; selectedResultIndex: number; selectedResult: HeaderSearchResult }} select
+   * @slot {{ result: HeaderSearchResult; index: number }}
    */
 
   /** Specify the search input value */
@@ -271,7 +272,7 @@
             class:selected="{selectedId === `search-menuitem-${i}`}"
             on:click|preventDefault="{selectResult}"
           >
-            <slot result="{result}">
+            <slot result="{result}" index="{i}">
               {result.text}
               {#if result.description}<span>– {result.description}</span>{/if}
             </slot>

tests/HeaderSearch.svelte

@@ -73,7 +73,11 @@
       on:select="{(e) => {
         console.log('on:select', e.detail);
       }}"
-    />
+      let:result
+      let:index
+    >
+      <div>{result.text}{index}</div>
+    </HeaderSearch>
     <HeaderAction bind:isOpen>
       <HeaderPanelLinks>
         <HeaderPanelDivider>Switcher subject 1</HeaderPanelDivider>