javascript - Javascript中的窗口，屏幕和文档有什么区别？(What is the difference between window, screen, and document in Javascript?)

Question

I see these terms used interchangeably as the global environment for the DOM.

(我认为这些术语可以互换使用，作为DOM的全局环境。)

What is the difference (if there is one) and when should I use each one?

(有什么区别（如果有的话）我应该在什么时候使用？)

  ask by TimeEmit translate from so

Answer 1

Window is the main JavaScript object root, aka the global object in a browser, also can be treated as the root of the document object model.

(Window是主要的JavaScript对象根，也就是浏览器中的global object ，也可以视为文档对象模型的根。)

You can access it as window

(您可以将其作为window访问)

window.screen or just screen is a small information object about physical screen dimensions.

(window.screen或just screen是一个关于物理屏幕尺寸的小信息对象。)

window.document or just document is the main object of the visible (or better yet: rendered) document object model/DOM.

(window.document或just document是可见（或更好的：渲染）文档对象模型/ DOM的主要对象。)

Since window is the global object you can reference any properties of it with just the property name - so you do not have to write down window.

(由于window是全局对象，因此您可以仅使用属性名称来引用它的任何属性 - 因此您不必记下window.)

- it will be figured out by the runtime.

( - 它将由运行时计算出来。)