JavaScript中的window.window [英] window.window in JavaScript
问题描述
为什么浏览器中的窗口对象指向窗口对象.Mozilla网站指出原因为
Why window object in the browser points to window object. Mozilla Website states the reason as
(可能)使window属性指向对象本身很重要，以使其易于引用全局对象(否则，您必须手动进行
var window = this;>分配在脚本顶部).
所以，我的问题是，如何将对象无限指向对象，以及如何避免执行 var window = this;
So, my question is, how to infinitely point an object to object and how that helps to avoid doing var window = this;
window.window // returns window object
window.window.window // also returns an window
推荐答案
window.window或window.window.window等，这不是实现，是副作用
window.window or window.window.window and so on, that's not an implementation, that's a side-effect
考虑这个
var win = {};
win.win = win;
现在
win.win === win
和
win.win.win === win
所以他们本可以做的就像
so what they could have done is like
var window = this;
实际上与
this.window = this;
因为在全局范围内声明的所有变量都是 this 的属性，所以这样做会导致 window.window.window.window ....
because all the variables declared in global scope are properties of this, so doing such thing resulted in window.window.window.window....
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