html运行实例（js_datatypes_null）-搜寻教程库

代码示例：（标识：js_datatypes_null）

<!DOCTYPE html>
<html>
<body>

<h1>JavaScript</h1>

<p>可以通过将值设置为 <b>null</b> 来清空对象。</p>

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

<script>
let person = {firstName:"Bill", lastName:"Gates", age:19, eyeColor:"blue"};
person = null;
document.getElementById("demo").innerHTML = typeof person;
</script>

</body>
</html>