转载:https://www.cnblogs.com/ddqyc/p/6200539.html
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title></title>
</head>
<body>
<div id="show"></div>
</body>
<script type="text/template" id="tt">
<h2>hello world</h2>
</script>
<script>
var show = document.getElementById("show");
var html = document.getElementById("tt");
show.innerHTML = html.innerHTML;
</script>
</html>