I see these terms used interchangeably as the global environment for the DOM. What is the difference (if there is one) and when should I use each one?
Window
is the main JavaScript object root, aka the global object
in a browser, and it can also be treated as the root of the document object model. You can access it as window
.
window.screen
or just screen
is a small information object about physical screen dimensions.
window.document
or just document
is the main object of the potentially visible (or better yet: rendered) document object model/DOM.
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.
- it will be figured out by the runtime.
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