57 lines
1.3 KiB
TypeScript
57 lines
1.3 KiB
TypeScript
// import { Suspense } from '@univoq // Error - mismatch in imports version
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import { JSX } from 'preact'
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import { useSignal } from '@preact/signals'
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function RenderError(
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{ error, fallback }: { error: Error; fallback: Fallback | undefined },
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) {
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if (fallback) {
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return fallback({ error })
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}
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return (
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<output>
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<pre>{String(error)}</pre>
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</output>
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)
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}
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export type Fallback = ({ error }: { error: Error }) => JSX.Element
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export type SuspenseProps = {
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loader: JSX.Element
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fallback?: Fallback
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signal?: AbortSignal
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} & ({ children: Promise<JSX.Element> } | { value: Promise<JSX.Element> })
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export default function Suspense(
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{ loader, fallback, signal, ...props }: SuspenseProps,
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) {
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const displayed = useSignal(loader)
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let loaded = false
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signal?.addEventListener('abort', () => {
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if (loaded) return
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try {
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signal.throwIfAborted()
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} catch (error) {
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displayed.value = RenderError({ error, fallback })
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}
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})
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//Prevent transpilation error due to children expected to not be a promise
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const inner = 'value' in props ? props.value : props.children
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inner
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.then((element) => {
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if (signal?.aborted) return
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displayed.value = element
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loaded = true
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})
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.catch((error) => {
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if (signal?.aborted) return
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displayed.value = RenderError({ error, fallback })
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})
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return <>{displayed}</>
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}
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