40 lines
1 KiB
TypeScript
40 lines
1 KiB
TypeScript
type RequestIdleCallbackHandle = any
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type RequestIdleCallbackOptions = {
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timeout: number
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}
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type RequestIdleCallbackDeadline = {
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readonly didTimeout: boolean
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timeRemaining: () => number
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}
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declare global {
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interface Window {
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requestIdleCallback: (
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callback: (deadline: RequestIdleCallbackDeadline) => void,
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opts?: RequestIdleCallbackOptions
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) => RequestIdleCallbackHandle
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cancelIdleCallback: (id: RequestIdleCallbackHandle) => void
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}
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}
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export const requestIdleCallback =
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(typeof self !== 'undefined' && self.requestIdleCallback) ||
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function (
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cb: (deadline: RequestIdleCallbackDeadline) => void
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): NodeJS.Timeout {
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let start = Date.now()
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return setTimeout(function () {
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cb({
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didTimeout: false,
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timeRemaining: function () {
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return Math.max(0, 50 - (Date.now() - start))
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},
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})
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}, 1)
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}
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export const cancelIdleCallback =
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(typeof self !== 'undefined' && self.cancelIdleCallback) ||
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function (id: RequestIdleCallbackHandle) {
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return clearTimeout(id)
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}
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