<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>Document</title>
<style>
html,body{
height: 500%;
}
</style>
</head>
<body>
<script>
function throwttle(fn,dalay){
//记录上一次触发的时间
var lastTime=0;
return function(){
//记录当前函数触发的时间
var nowTime=Date.now();
if(nowTime-lastTime>dalay){
fn();
lastTime=nowTime;
}
}
}
document.onscroll=throwttle(function(){console.log('scroll事件被触发了'+Date.now())},200)
</script>
</body>
</html>运行结果
