How to get screen width without (minus) scrollbar?

Question

.prop("clientWidth") and .prop("scrollWidth")

var actualInnerWidth = $("body").prop("clientWidth"); // El. width minus scrollbar width
var actualInnerWidth = $("body").prop("scrollWidth"); // El. width minus scrollbar width

in JavaScript:

var actualInnerWidth = document.body.clientWidth;     // El. width minus scrollbar width
var actualInnerWidth = document.body.scrollWidth;     // El. width minus scrollbar width

_{P.S: Note that to use scrollWidth reliably your element should not overflow horizontally}

jsBin demo

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You could also use .innerWidth() but this will work only on the body element

var innerWidth = $('body').innerWidth(); // Width PX minus scrollbar 

You can use vanilla javascript by simply writing:

var width = el.clientWidth;

You could also use this to get the width of the document as follows:

var docWidth = document.documentElement.clientWidth || document.body.clientWidth;

Source: MDN

You can also get the width of the full window, including the scrollbar, as follows:

var fullWidth = window.innerWidth;

However this is not supported by all browsers, so as a fallback, you may want to use docWidth as above, and add on the scrollbar width.

Source: MDN

Here are some examples which assume $element is a jQuery element:

// Element width including overflow (scrollbar)
$element[0].offsetWidth; // 1280 in your case

// Element width excluding overflow (scrollbar)
$element[0].clientWidth; // 1280 - scrollbarWidth

// Scrollbar width
$element[0].offsetWidth - $element[0].clientWidth; // 0 if no scrollbar

Try this :

$('body, html').css('overflow', 'hidden');
var screenWidth1 = $(window).width();
$('body, html').css('overflow', 'visible');
var screenWidth2 = $(window).width();
alert(screenWidth1); // Gives the screenwith without scrollbar
alert(screenWidth2); // Gives the screenwith including scrollbar

You can get the screen width by with and without scroll bar by using this code. Here, I have changed the overflow value of body and get the width with and without scrollbar.

The safest place to get the correct width and height without the scrollbars is from the HTML element. Try this:

var width = document.documentElement.clientWidth
var height = document.documentElement.clientHeight

Browser support is pretty decent, with IE 9 and up supporting this. For OLD IE, use one of the many fallbacks mentioned here.