The overscroll-behavior-x CSS property sets the browser's behavior when the horizontal boundary of a scrolling area is reached.

See overscroll-behavior for a full explanation.

/* Keyword values */
overscroll-behavior-x: auto; /* default */
overscroll-behavior-x: contain;
overscroll-behavior-x: none;

/* Global values */
overscroll-behavior-x: inherit;
overscroll-behavior-x: initial;
overscroll-behavior-x: unset;


The overscroll-behavior-x property is specified as a keyword chosen from the list of values below.


The default scroll overflow behavior occurs as normal.
Default scroll overflow behavior is observed inside the element this value is set on (e.g. "bounce" effects or refreshes), but no scroll chaining occurs to neighbouring scrolling areas, e.g. underlying elements will not scroll.
No scroll chaining occurs to neighbouring scrolling areas, and default scroll overflow behavior is prevented.

Formal definition

Initial valueauto
Applies tonon-replaced block-level elements and non-replaced inline-block elements
Computed valueas specified
Animation typediscrete

Formal syntax

contain | none | auto


Preventing an underlying element from scrolling horizontally

In our simple overscroll-behavior-x example (see source code also), we have two block-level boxes, one inside the other. The outer box has a large width set on it so the page will scroll horizontally. The inner box has a small width (and height) set on it so it sits comforably inside the viewport, but its content is given a large width so it will scroll horizontally.

By default, when the inner box is scrolled and a scroll boundary is reached, the whole page will begin to scroll, which is probably not what we want. To avoid this, you can set overscroll-behavior-x: contain on the inner box:

main > div {
  height: 300px;
  width: 500px;
  overflow: auto;
  position: relative;
  top: 100px;
  left: 100px;
  overscroll-behavior-x: contain;


Specification Status Comment
CSS Overscroll Behavior Module Level 1
The definition of 'overscroll-behavior-x' in that specification.
Working Draft

Browser compatibility

ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidFirefox for AndroidOpera for AndroidSafari on iOSSamsung Internet
overscroll-behavior-xChrome Full support 63Edge Partial support 18
Partial support 18
Notes Currently the none value incorrectly behaves as contain (allowing for the elastic bounce effect).
Firefox Full support 59IE No support NoOpera Full support 50Safari No support No
No support No
Notes See bug 176454.
WebView Android Full support 63Chrome Android Full support 63Firefox Android Full support 59Opera Android Full support 46Safari iOS No support No
No support No
Notes See bug 176454.
Samsung Internet Android Full support 8.0


Full support
Full support
Partial support
Partial support
No support
No support
See implementation notes.
See implementation notes.

See also