<!DOCTYPE html>
<html>
<body>
<p id="myP" contenteditable="true">请点击按钮来检查本元素是否可编辑。</p>
<button onclick="myFunction()">试一下</button>
<p id="demo"></p>
<script>
function myFunction() {
var x = document.getElementById("myP").isContentEditable;
document.getElementById("demo").innerHTML = x + " = p 元素可编辑。如需查看效果，请尝试改变其文本。";
}
</script>
</body>
</html>