next
Version:
The React Framework
37 lines (36 loc) • 1.49 kB
JavaScript
import { requestIdleCallback } from '../request-idle-callback';
// 3.8s was arbitrarily chosen as it's what https://web.dev/interactive
// considers as "Good" time-to-interactive. We must assume something went
// wrong beyond this point, and then fall-back to a full page transition to
// show the user something of value.
const MS_MAX_IDLE_DELAY = 3800;
/** Resolve a promise that times out after given amount of milliseconds. */ export function resolvePromiseWithTimeout(p, err, devPromise) {
return new Promise((resolve, reject)=>{
let cancelled = false;
p.then((r)=>{
// Resolved, cancel the timeout
cancelled = true;
resolve(r);
}).catch(reject);
// We wrap these checks separately for better dead-code elimination in
// production bundles.
if (process.env.NODE_ENV === 'development') {
;
(devPromise || Promise.resolve()).then(()=>{
requestIdleCallback(()=>setTimeout(()=>{
if (!cancelled) {
reject(err);
}
}, MS_MAX_IDLE_DELAY));
});
}
if (process.env.NODE_ENV !== 'development') {
requestIdleCallback(()=>setTimeout(()=>{
if (!cancelled) {
reject(err);
}
}, MS_MAX_IDLE_DELAY));
}
});
}
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