<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>添加按钮</title>
<style>
.box{
width: 50px;
height:50px;
border:1px solid #000;
}
</style>
</head>
<body>
<div class="wrap box">111</div>
<input type="text" id="addvalue">
<button type="button">添加</button>
</body>
<script>
var add=document.getElementsByClassName("add")[0];
add.addEventListener("click",function(e){
e.preventDefault();
var divs=document.createElement("div");
var addValue=document.getElementById("addvalue").value;
var textDiv=document.createTextNode(addValue);
divs.appendChild(textDiv);
divs.setAttribute("class","box");
// 怎么显示在class:wrap元素的前面 或者后面 还有里面?
})
</script>
</html>
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