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[js] 第655天 js的作用域有哪些？ #3502

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haizhilin2013 opened this issue Jan 29, 2021 · 6 comments
Open

[js] 第655天 js的作用域有哪些？ #3502

haizhilin2013 opened this issue Jan 29, 2021 · 6 comments
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@haizhilin2013
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第655天 js的作用域有哪些？

#40

3+1官网

我也要出题
@haizhilin2013 haizhilin2013 added the js JavaScript label Jan 29, 2021
@zuiaishuilanjiao
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全局变量 和 局部变量

@okbug
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okbug commented Feb 4, 2021

函数作用域和块级作用域

@aijiushimeicuo
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全局作用域、块级作用域、函数作用域、闭包作用域

@hyhzzz
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hyhzzz commented Jun 8, 2021

函数作用域/块作用域

@xiezhazha
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ES5中：全局变量和局部变量
ES6中：块级作用域

@hyj443
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hyj443 commented Oct 22, 2021

全局作用域 函数作用域 块作用域

作用域，就是当前的执行上下文，值和表达式在其中可以被访问到的上下文

作用域可以根据代码层次分层，以便于子作用域可以访问父作用域，沿着作用域链查找

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@haizhilin2013 @okbug @zuiaishuilanjiao @hyhzzz @hyj443 @aijiushimeicuo @xiezhazha