14nodeOper.html
<!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>
.box {
width: 200px;
height: 200px;
background-color: pink;
}
.block {
display: block;
}
</style>
</head>
<body>
<button id="btn_create">创建</button>
<button id="btn_del">删除</button>
<script src="../../01-ES/code/tool.js"></script>
<script>
// 创建元素
var oDiv = document.createElement("div");
oDiv.innerHTML = "我是动态创建div";
oDiv.className = "box";
// 将元素添加到body 上树
//document.body.appendChild(oDiv); 在末尾追加儿子
document.body.insertBefore(oDiv,document.body.children[0]);
var i = 0;
$("btn_create").onclick = function() {
var oSpan = document.createElement("span");
oSpan.className = "block";
oSpan.innerHTML = i++;
document.body.appendChild(oSpan);
//document.body.innerHTML += "<span>"+(i++)+"</span><br/>";
}
$("btn_del").onclick = function() {
var spans = document.getElementsByTagName("span");
/*
for(var i=0; i<spans.length; i++) {
spans[i].remove(); // 删除自己
i--;
}
*/
/*
for(var i=spans.length-1; i>=0; i--) {
spans[i].remove();
}
*/
}
// i=0 [span0,span1,span2,.....]
// i=1 [span1,span2,.....]
</script>
</body>
</html>
原文地址：https://www.cnblogs.com/HiJackykun/p/11108162.html
时间： 2024-10-02 02:16:06