@threlte/extras
onSuspend
onSuspend invokes a callback when the component becomes suspended
within the boundaries of a <Suspense> component. If there is no <Suspense>
component, the callback will never be executed, as the component will never
suspend.
Example
The following component loads a model with the hook useGltf and is potentially
wrapped in a <Suspense> boundary.
<script>
  import { T } from '@threlte/core'
  import { onSuspend, useGltf } from '@threlte/extras'
  const gltf = useGltf('model.gltf')
  onSuspend(() => {
    console.log('The component has been suspended')
  })
</script>
{#await gltf then { scene }}
  <T is={scene}>
{/await}
    onSuspend can be used to execute additional logic
when a component becomes suspended within a <Suspense> boundary.