Comments (2)
节流
需要对发起请求非常频繁的事件控制住频率,如在监听window.resize
事件,在固定多久的时间内请求一次。
节流的函数中好像一定要有一个标志位,在执行 setTimeout
中的函数时,会一起把这个标志位设置为初始状态,下次检测为初始状态后,才能再建立一次 setTimeout
节流中不会去取消之前需要执行的函数,只是如果之前的函数还没开始执行的话,那么下一次函数也就不会创建
function throttle(callback, limit) {
var wait = false;
return function() {
if (!wait) {
wait = true;
setTimeout(function(){
callback();
wait = false;
}, limit)
}
}
}
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参考一下 什么是防抖和节流,以及如何编码实现?
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