10.2 添加节点
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<script>
function addNode() {
var div = document.getElementById("testDiv");
var textNode = document.createTextNode("123");
var element = document.createElement("p");
element.appendChild(textNode);
div.appendChild(element);
}
</script>
</head>
<body>
<p>JavaScript</p>
<div id="testDiv">
</div>
<button onclick="addNode()">click</button>
</body>
</html>