html运行实例（eg_js_datatypes_null）-搜寻教程库

代码示例：（标识：eg_js_datatypes_null）

<!DOCTYPE html>
<html>
<body>

<h2>JavaScript 数据类型</h2>

<p>您可以通过设置值为 null 来清空对象：</p>

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

<script>
var person = {firstName:"Bill", lastName:"Gates", age:62, eyeColor:"blue"};
person = null;
document.getElementById("demo").innerHTML = typeof person;
</script>

</body>
</html>