/
githubmirror
/
tldraw
Обзор
Документация
Войти
/
githubmirror
/
tldraw
Код
Запросы
0
Пакеты
0
Релизы
0
Аналитика
Безопасность
main
apps/docs/utils/debounce.ts
54 строки
1 KB
Mitja Bezenšek
Move from function properties to methods (#4288)
29 июл 2024, 16:40
Не верифицирован
29 июл 2024, 16:40
f05d102
Код
Авторство
О чём код?
/** * Debounce a function. * * @example * * ```ts * const A = debounce(myFunction, 1000) * ``` * * @public * @see source - https://gist.github.com/ca0v/73a31f57b397606c9813472f7493a940 */ export function debounce<T extends unknown[], U>( callback: (...args: T) => PromiseLike<U> | U, wait: number ) { let state: | undefined | { timeout: ReturnType<typeof setTimeout> promise: Promise<U> resolve(value: U | PromiseLike<U>): void reject(value: any): void latestArgs: T } = undefined const fn = (...args: T): Promise<U> => { if (!state) { state = {} as any state!.promise = new Promise((resolve, reject) => { state!.resolve = resolve state!.reject = reject }) } clearTimeout(state!.timeout) state!.latestArgs = args state!.timeout = setTimeout(() => { const s = state! state = undefined try { s.resolve(callback(...s.latestArgs)) } catch (e) { s.reject(e) } }, wait) return state!.promise } fn.cancel = () => { if (!state) return clearTimeout(state.timeout) } return fn }