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Cosen95 avatar Cosen95 commented on May 23, 2024

作用域

作用域是指程序源代码中定义变量的区域。

作用域规定了如何查找变量，也就是确定当前执行代码对变量的访问权限。

JavaScript 采用词法作用域，也就是静态作用域。

静态作用域与动态作用域

因为 JavaScript 采用的是词法作用域，函数的作用域在函数定义的时候就决定了。

而与词法作用域相对的是动态作用域，函数的作用域是在函数调用的时候才决定的。

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quinn-getty avatar quinn-getty commented on May 23, 2024

函数的作用域在函数定义的时候就决定了
函数的作用域是在函数调用的时候才决定的。
是不是有点问题呀？

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