$host
When compiling a component as a custom element, the $host rune provides access to the host element, allowing you to (for example) dispatch custom events (demo):
Stepper
<svelte:options customElement="my-stepper" />
<script>
function dispatch(type) {
$host().dispatchEvent(new CustomEvent(type));
}
</script>
<button onclick={() => dispatch('decrement')}>decrement</button>
<button onclick={() => dispatch('increment')}>increment</button><svelte:options customElement="my-stepper" />
<script lang="ts">
function dispatch(type) {
$host().dispatchEvent(new CustomEvent(type));
}
</script>
<button onclick={() => dispatch('decrement')}>decrement</button>
<button onclick={() => dispatch('increment')}>increment</button>App
<script>
import './Stepper.svelte';
let count = $state(0);
</script>
<my-stepper
ondecrement={() => count -= 1}
onincrement={() => count += 1}
></my-stepper>
<p>count: {count}</p><script lang="ts">
import './Stepper.svelte';
let count = $state(0);
</script>
<my-stepper
ondecrement={() => count -= 1}
onincrement={() => count += 1}
></my-stepper>
<p>count: {count}</p>previous next