Window.scrollMaxX

Non-standard
This feature is non-standard and is not on a standards track. Do not use it on production sites facing the Web: it will not work for every user. There may also be large incompatibilities between implementations and the behavior may change in the future.

The Window.scrollMaxX read-only property returns the maximum number of pixels that the document can be scrolled horizontally.

Syntax

xMax = window.scrollMaxX

xMax is the number of pixels.

Example

// Scroll to right edge of the page
let maxX = window.scrollMaxX;

window.scrollTo(maxX, 0);

Notes

Do not use this property to get the total document width, which is not equivalent to window.innerWidth + window.scrollMaxX, because window.innerWidth includes the width of any visible vertical scrollbar, thus the result would exceed the total document width by the width of any visible vertical scrollbar. Instead use document.body.scrollWidth. See also window.scrollMaxY.

Specification

This is not part of any specification.

Browser compatibility

	Desktop						Mobile
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
`scrollMaxX` Non-standard	Chrome No support No	Edge No support No	Firefox Full support Yes	IE ?	Opera ?	Safari No support No	WebView Android No support No	Chrome Android No support No	Firefox Android Full support Yes	Opera Android ?	Safari iOS No support No	Samsung Internet Android No support No

Legend

Full support: Full support
No support: No support
Compatibility unknown: Compatibility unknown
Non-standard. Expect poor cross-browser support.: Non-standard. Expect poor cross-browser support.