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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 | 8x 8x 1x 1x 1x 100x 100x 1x 1x 99x 99x 99x | import { purry } from "./purry"; /** * The Debounce technique allow us to “group” multiple sequential calls in a single one. * @description * https://css-tricks.com/debouncing-throttling-explained-examples/ * @param func - Any provided function * @param debounceTimeMs - duration in milliseconds * @example * const debouncedLog = P.debounce(console.log, 500) * debouncedLog("I will be printed only if 500ms ago this function was not called") * @category Function */ export function debounce<E extends (...args: any[]) => any>(debounceTimeMs: number): (func: E) => E export function debounce<E extends (...args: any[]) => any>(func: E, debounceTimeMs: number): E export function debounce() { return purry(__debounce, arguments) } function __debounce<E extends (...args: any[]) => any>( func: E, debounceTimeMs: number ): E { // tslint:disable: no-let let result: { readonly r: ReturnType<E> } | null = null; let debounceTimer: any = null; return ((...args) => { if (result == null) { result = { r: func(...args), }; return result.r; } clearTimeout(debounceTimer); debounceTimer = setTimeout(() => { result = { r: func(...args), }; }, debounceTimeMs); return result.r; }) as E; } |