<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>防抖</title>
</head>
<body>
<input type="text" />
<input type="submit" id="input" />
<script type="text/javascript">
let btn = document.getElementById('input')
btn.addEventListener('click',debounce(submit,5000),false)
function submit(arg){
console.log(this)
console.log(arg)
}
function debounce(fn,time){
let t = null;
return function(){
// 第一次执行
if(t===null){
fn.apply(this,arguments)
}
// 非第一次
else {
clearTimeout(t)
}
t = setTimeout(() =>{
t = null
},time)
}
}
</script>
</body>
</html>
效果图：