42 lines
1.6 KiB
JavaScript
42 lines
1.6 KiB
JavaScript
import { useState, useEffect } from 'react';
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import { env } from './env';
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const cache = new WeakMap();
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const NO_OPTIONS = {};
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export function useSidecar(importer, effect) {
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const options = (effect && effect.options) || NO_OPTIONS;
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if (env.isNode && !options.ssr) {
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return [null, null];
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}
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// eslint-disable-next-line react-hooks/rules-of-hooks
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return useRealSidecar(importer, effect);
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}
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function useRealSidecar(importer, effect) {
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const options = (effect && effect.options) || NO_OPTIONS;
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const couldUseCache = env.forceCache || (env.isNode && !!options.ssr) || !options.async;
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const [Car, setCar] = useState(couldUseCache ? () => cache.get(importer) : undefined);
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const [error, setError] = useState(null);
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useEffect(() => {
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if (!Car) {
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importer().then((car) => {
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const resolved = effect ? effect.read() : car.default || car;
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if (!resolved) {
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console.error('Sidecar error: with importer', importer);
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let error;
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if (effect) {
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console.error('Sidecar error: with medium', effect);
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error = new Error('Sidecar medium was not found');
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}
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else {
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error = new Error('Sidecar was not found in exports');
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}
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setError(() => error);
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throw error;
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}
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cache.set(importer, resolved);
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setCar(() => resolved);
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}, (e) => setError(() => e));
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}
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}, []);
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return [Car, error];
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}
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