<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>li</title>
<style>
ul{
list-style:none
}
li{
width:200px;
height:30px;
background: green;
border:1px solid #000;
margin:5px auto;
}
</style>
</head>
<body>
<button onclick="addFunction()">点我增加</button>
<ul></ul>
<script type="text/javascript">
var num = 1;
var u=document.querySelector("ul");
function addFunction(){
var l=document.createElement('li')
var t=document.createTextNode(num);
l.appendChild(t);
u.appendChild(l);
num++
};
u.addEventListener('click',function(e){
console.log(777);
if(e.target && e.target.nodeName.toUpperCase() === 'LI') {
console.log(e.target.innerHTML);
}
})
</script>
</body>
</html>
