The upper scope of the [JS] function, whose parent scope is who, is not related to where the function is executed.

The upper scope of the function, whose parent scope is who, is not related to where the function is executed.

<script>    //如何查找上级作用域?    //看函数在哪个作用域下定义的,他的上级作用域就是谁. 跟函数在哪执行的没什么关系.    var num = 12;    function fn() {        var num = 120;        return function () {            console.log(num); ///上级作用域和在哪定义的有关系        }    }    var f = fn();    f(); ///上级作用域和在哪里执行的没啥关系    ~function () {        var num = 1200;        f(); //上级作用域和在哪里执行的没啥关系    }();</script>

The upper scope of the [JS] function, whose parent scope is who, is not related to where the function is executed.