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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 45 46 47 48 49 50 | 8x 8x 1x 1x 1x 10x 10x 1x 1x 1x 9x 9x 9x 9x 9x | /** * The Debounce technique allow us to “group” multiple sequential calls in a single one. * @description * You can find great article that explains how throttle works [here](https://css-tricks.com/debouncing-throttling-explained-examples/) * @param func - Any provided function * @param debounceTimeMs - duration in milliseconds * @signature * P.throttle(func, throttleTimeMs) * @example * // Execute log * P.throttle(console.log, 1000) * @category Function */ import { purry } from "./purry"; export function throttle<E extends (...args: any[]) => any>(func: E, throttleTimeMs: number): E export function throttle<E extends (...args: any[]) => any>(throttleTimeMs: number): (func: E) => E export function throttle() { return purry(__throttle, arguments) } function __throttle<Input extends any[], R>( func: (...args: Input) => R, throttleTimeMs: number ): (...args: Input) => R { // tslint:disable: no-let let lastExec: number | null = null; let result: { readonly r: R } | null = null; return (...args) => { if (result == null) { lastExec = Date.now(); result = { r: func(...args), }; return result.r; } const diff = Date.now() - lastExec!; Eif (diff >= throttleTimeMs) { lastExec = Date.now(); result = { r: func(...args), }; return result.r; } return result.r; }; } |