42 lines
867 B
TypeScript
Executable File
42 lines
867 B
TypeScript
Executable File
/**
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* A function that emits a side effect and does not return anything.
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*/
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export type Procedure = (...args: any[]) => void
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export type Options = {
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isImmediate: boolean
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}
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export function debounce<F extends Procedure>(
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func: F,
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waitMilliseconds: number = 50,
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options: Options = {
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isImmediate: false,
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},
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): F {
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let timeoutId: NodeJS.Timeout | undefined
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return function retA(this: any, ...args: any[]) {
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const context = this
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const doLater = function retB() {
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timeoutId = undefined
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if (!options.isImmediate) {
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func.apply(context, args)
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}
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}
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const shouldCallNow = options.isImmediate && timeoutId === undefined
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if (timeoutId) {
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clearTimeout(timeoutId)
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}
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timeoutId = <any>setTimeout(doLater, waitMilliseconds)
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if (shouldCallNow) {
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func.apply(context, args)
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}
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} as any
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}
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