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overscroll-behavior

The overscroll-behavior CSS property sets what a browser does when reaching the boundary of a scrolling area. It's a shorthand for overscroll-behavior-x and overscroll-behavior-y.

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

/* Two values */
overscroll-behavior: auto contain;

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

By default, mobile browsers tend to provide a "bounce" effect or even a page refresh when the top or bottom of a page (or other scroll area) is reached. You may also have noticed that when you have a dialog box with scrolling content on top of a page of scrolling content, once the dialog box's scroll boundary is reached, the underlying page will then start to scroll — this is called scroll chaining.

In some cases these behaviors are not desirable. You can use overscroll-behavior to get rid of unwanted scroll chaining and the browser's Facebook/Twitter app-inspired "pull to refresh"-type behavior.

Syntax

The overscroll-behavior property is specified as one or two keywords chosen from the list of values below.

Two keywords specifies the overscroll-behavior value on the x and y axes respectively. If only one value is specified, both x and y are assumed to have the same value.

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 neighbouring scrolling areas, e.g. underlying elements will not scroll.
none
No scroll chaining occurs to neighbouring 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

[ contain | none | auto ]{1,2}

Examples

Preventing an underlying element from scrolling

In our overscroll-behavior example (see the source code also), we present a full-page list of fake contacts, and a dialog box containing a chat window.

Both of these areas scroll; normally if you scrolled the chat window until you hit a scroll boundary, the underlying contacts window would start to scroll too, which is not desirable. This can be stopped using overscroll-behavior-y (overscroll-behavior would also work) on the chat window, like this:

.messages {
  height: 220px;
  overflow: auto;
  overscroll-behavior-y: contain;
} 

We also wanted to get rid of the standard overscroll effects when the contacts are scrolled to the top or bottom (e.g. Chrome on Android refreshes the page when you scroll past the top boundary). This can be prevented by setting overscroll-behavior: none on the <body> element:

body {
  margin: 0;
  overscroll-behavior: none;
}

Specifications

Browser compatibilityUpdate compatibility data on GitHub

Desktop
Chrome Edge Firefox Internet Explorer Opera Safari
overscroll-behavior 63 18
18
Currently the none value incorrectly behaves as contain (allowing for the elastic bounce effect).
59 No 50 No
No
See bug 176454.
Mobile
Android webview Chrome for Android Firefox for Android Opera for Android Safari on iOS Samsung Internet
overscroll-behavior 63 63 59 46 No
No
See bug 176454.
8.0

See also

© 2005–2020 Mozilla and individual contributors.
Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-US/docs/Web/CSS/overscroll-behavior