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JavaScript-预编译 | 张磊博客 #15

Open ThirtyZhang opened 4 years ago

ThirtyZhang commented 4 years ago

https://thirtyzhang.github.io/2020/02/22/javascript-yu-bian-yi/

预编译前奏 imply globle 暗示全局变量 : 未声明直接赋值的的变量归window所有

一切声明的全局变量 , 全是window的属性.

window就是全局的域 var a = 123; //window { //