<html>
<body>
<p id="myP" contenteditable="true">点击按钮查看该段落是否可编辑。</p>
<button onclick="myFunction()">点我</button>
<p id="demo"></p>
<script>
function myFunction() {
var x = document.getElementById("myP").contentEditable;
document.getElementById("demo").innerHTML = x + " = p 元素可编辑，修改文本，查看效果。";
}
</script>
</body>
</html>