A brief discussion on the difference between $(document) and $(window)_jquery

First of all

$(document) This is to get the document object
$(window) This is to get the window object, which is the browser client area

It’s very straightforward to give you an example

$(document).height()
$(window).height()

Note, let the web page have scroll bars

Then output the sizes of these two values, and you will know the difference

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