代码示例:(标识:jsck_element_iscontenteditable)
<!DOCTYPE html>
<html>
<body>

<h1>Element 对象</h1>

<h2>isContentEditable 属性</h2>

<p id="myP" contenteditable="true">我是 myP。我可编辑吗?</p>

<p id="demo"></p>

<script>
let answer = document.getElementById("myP").isContentEditable;
let text = "myP 不可编辑。"

if (answer == true) {
  text = "myP 可编辑。请尝试修改此文本。"
}
document.getElementById("demo").innerHTML = text;
</script>

</body>
</html>
运行结果: