javascript------>delete

delete只能删除属性，不能删除变量

1 var a = "roboce";
2 delete a; // false
3 a;
4 
5 
6 b = "haha";
7 delete b; // true
8 b;          // window.b;

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原文地址：https://www.cnblogs.com/daishuguang/p/4007882.html