XIYUETA.COM
源代码：
点击运行
<script> var global = { a: 123, b: { c: 1345 } }; delete global; //无效 document.write(global) document.write("<br>") obj = { a: 123 }; document.write(typeof(obj)) document.write("<br>") delete obj; // 删除obj全局变量，window对象的obj属性 document.write(typeof(obj)) document.write("<br>") console.log(obj);//obj is not defined </script>
运行结果