简单教程
提交运行
代码编辑器:
<p>对象可以通过设置为 <b>null</b> 来清空</p> <p id="demo"></p> <script> var person = {firstName:"John", lastName:"Doe", age:50, eyeColor:"blue"}; var person = null; document.getElementById("demo").innerHTML = typeof person; </script>
运行结果: