防抖函数 debounce debouncePromise
普通函数版
/*** 函数防抖* @param fn* @param ms* @returns*/
export const debounce = (fn: Function, ms = 300) => {let timeoutId: ReturnType<typeof setTimeout>return function (this: any, ...args: any[]) {clearTimeout(timeoutId)timeoutId = setTimeout(() => {fn.apply(this, args)}, ms)}
}
如果用普通的 debounce 去防抖 promise 类型的异步函数，是获取不到返回值的。此时需要使用 Promise 版的防抖函数
Promise 版
/*** 防抖Promise* @param fn* @param delay* @returns*/
export function debouncePromise(fn: (...arg0: any[]) => Promise<unknown>, delay = 300) {let pendingPromise: ReturnType<typeof setTimeout>return function (...args: any[]) {if (pendingPromise) {clearTimeout(pendingPromise)}return new Promise((resolve, reject) => {pendingPromise = setTimeout(() => {fn(...args).then(resolve).catch(reject)}, delay)})}
}