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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 | 1x 1x 1x 3x 3x 1x 1x | /**
* @description 函数节流。在wait秒内最多只执行一次func，且执行第一次触发的func
* @function throttle
* @param {Function} func - 要节流的函数
* @param {number} [wait=300] - 需要节流的毫秒
* @returns {Function} 返回节流函数
* @author liukun <919590347@qq.com>
* @example
* import { throttle } from '@wont/utils'
* const testFn = () => {
* console.log('throttle running...')
* }
* window.addEventListener('mousemove', throttle(testFn, 500))
*/
type Func = (...rest: any[]) => void
export function throttle(func: Func, wait = 300): Func {
let lastTime = 0;
return function next(this: Func, ...rest) {
const nowTime = Date.now();
if (nowTime - lastTime >= wait || !lastTime) {
func.apply(this, rest);
lastTime = nowTime;
}
};
}
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