You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
54 lines
1.2 KiB
54 lines
1.2 KiB
/**
|
|
* @desc 函数防抖
|
|
* @param func 目标函数
|
|
* @param wait 延迟执行毫秒数
|
|
* @param immediate true - 立即执行， false - 延迟执行
|
|
*/
|
|
export const debounce = function(func, wait = 1000, immediate = true) {
|
|
let timer;
|
|
return function() {
|
|
let context = this,
|
|
args = arguments;
|
|
if (timer) clearTimeout(timer);
|
|
if (immediate) {
|
|
let callNow = !timer;
|
|
timer = setTimeout(() => {
|
|
timer = null;
|
|
}, wait);
|
|
if (callNow) func.apply(context, args);
|
|
} else {
|
|
timer = setTimeout(() => {
|
|
func.apply(context, args);
|
|
}, wait)
|
|
}
|
|
}
|
|
}
|
|
/**
|
|
* @desc 函数节流
|
|
* @param func 函数
|
|
* @param wait 延迟执行毫秒数
|
|
* @param type 1 使用表时间戳，在时间段开始的时候触发 2 使用表定时器，在时间段结束的时候触发
|
|
*/
|
|
export const throttle = (func, wait = 1000, type = 1) => {
|
|
let previous = 0;
|
|
let timeout;
|
|
return function() {
|
|
let context = this;
|
|
let args = arguments;
|
|
if (type === 1) {
|
|
let now = Date.now();
|
|
|
|
if (now - previous > wait) {
|
|
func.apply(context, args);
|
|
previous = now;
|
|
}
|
|
} else if (type === 2) {
|
|
if (!timeout) {
|
|
timeout = setTimeout(() => {
|
|
timeout = null;
|
|
func.apply(context, args)
|
|
}, wait)
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|