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overscroll-behavior-x

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: revert;
overscroll-behavior-x: revert-layer;
overscroll-behavior-x: unset;

Syntax

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

Values

auto: The default scroll overflow behavior occurs as normal.
contain: 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 neighboring scrolling areas, e.g. underlying elements will not scroll.
none: No scroll chaining occurs to neighboring scrolling areas, and default scroll overflow behavior is prevented.

Formal definition

Initial value	`auto`
Applies to	non-replaced block-level elements and non-replaced inline-block elements
Inherited	no
Computed value	as specified
Animation type	discrete

Formal syntax

overscroll-behavior-x = 
  contain  |
  none     |
  auto

Examples

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 comfortably 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;
}

Specifications

Specification
CSS Overscroll Behavior Module Level 1 # overscroll-behavior-longhands-physical

Browser compatibility

	Desktop						Mobile
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	WebView Android	Chrome Android	Firefox for Android	Opera Android	Safari on IOS	Samsung Internet
`overscroll-behavior-x`	63	18 Currently the `none` value incorrectly behaves as `contain` (allowing for the elastic bounce effect).	59	No	50	16	63	63	59	46	16	8.0