<!DOCTYPE html>
<html lang="en">
<head>
<title>hello world</title>
</head>
<body>
<script type="text/javascript">
var op =document.createElement('p');
var body = document.getElementsByTagName('body');
op.innerHTML = 'hello world';
body[0].appendChild(op);
</script>
</body>
</html>HTML DOM 操作-创建节点【2018.11.26】
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