autocomplete_item_search_live_4.html.eex

<script>
  function autocomplete() {
    return {
      // ...
      
      select() {
        this.$refs[`item-${this.focus}`]?.click();
        this.focusPrev();
      },
      
      // ...
    }
  }
</script>

<!-- 
  add the following attribute to
  the autocomplete container div
-->
<div x-on:keydown.enter="select()" />