Question

How to get them by using JS and jQuery?

I know $(window).innerWidth() can get. But I don’t hope it contains the width or height of the scroll bar.

Thank you!

Answer 1

From the jQuery website:

$(window).width();   // returns width of browser viewport
$(document).width(); // returns width of HTML document

If you add overflow:hidden to the body of this page (so there’s no scrollbar), then run $(window).width() in a JS console, notice this value increases!