html运行实例（js_object_es5

代码示例：（标识：js_object_es5_3）

<!DOCTYPE html>
<html>
<body>

<h1>JavaScript Object.keys()</h1>

<p>本例列出一个对象的可枚举属性。</p>

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

<script>
// 创建对象：
const person = {
  firstName: "Bill",
  lastName: "Gates",
  language: "EN"
}

// 更改属性
Object.defineProperty(person, "language", {enumerable:false});

// 显示属性
document.getElementById("demo").innerHTML = Object.keys(person);
</script>

</body>
</html>