z-util-page
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JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.debounce = debounce;
/**
* 将函数处理为防抖函数
* @category 辅助函数
* @example
* ```ts
* let debounced = debounce(function () {
* console.log('身体和心灵，总有一个在路上。');
* return '身体和心灵，总有一个在路上。';
* }, 1000, true);
* debounced.then(function (res) {
* console.log(res);
* });
* debounced();
* debounced.cancel();
* ```
* @param func 待处理函数
* @param wait 函数执行延迟时间
* @param immediatel 是否立刻执行
*/
function debounce(func, wait, immediatel) {
let timeout, content, args, callbacks = [], res;
/**
* 处理好的防抖函数
* @param this 执行上下文继承自传入函数
* @param args 参数继承自传入函数
*/
const debounced = function (...args) {
content = this;
if (immediatel && !timeout) {
res = func.apply(content, args);
let resolvedRes = res;
callbacks.forEach(function (callback) {
if (callback instanceof Function)
resolvedRes = callback(resolvedRes);
});
}
if (timeout)
clearTimeout(timeout);
timeout = setTimeout(function () {
func.apply(content, args);
timeout = null;
}, wait);
return res;
};
/**
* 取消防抖函数执行
*/
debounced.cancel = function () {
if (timeout) {
clearTimeout(timeout);
timeout = null;
}
};
/**
* 注册防抖函数执行后的回调
* @param callback 回调函数
* @returns 处理好的防抖函数
*/
debounced.then = function (callback) {
callbacks.push(callback);
return this;
};
return debounced;
}