JavaScript词法作用域动态的相关内容

文章 2022-04-23 来自：开发者社区

JavaScript 深入之词法作用域和动态作用域

原文链接： github.com作用域作用域是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。ECMAScript6之前只有全局作用域和函数作用域。JavaScript采用词法作用域(lexical scoping)，也就是静态作用域。静态作用域与动态作用域因为采用词法作用域，函数的作用域在函数定义的时候就决定了。与词法作用域相对的是动态作用域，函数....

文章 2017-12-14 来自：开发者社区

JavaScript深入之词法作用域和动态作用域

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(lexical scoping)，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。让....

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更新时间 2022-08-04 14:01:56

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