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关于var a = 2; JS干了什么？
source link: https://juejin.im/post/5c04faebe51d4533253f35d9
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又是一年临近年底了，年底制定下了许多计划，正在一点一点实现，最近在开始读《你不知道的Javascript》了，也会慢慢把读书笔记通过博客的形式输出出来，让自己印象更深刻，今天就来聊聊JS中的var a = 2;这行代码发生了什么？ 编译 对于编程语言来说都会有
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