`overflow-block` CSS media feature

Baseline Widely available

This feature is well established and works across many devices and browser versions. It's been available across browsers since September 2023.

The overflow-block CSS media feature can be used to test how the output device handles content that overflows the initial containing block along the block axis.

Note: The overflow-block property does not determine whether overflow occurs; rather, it reveals the device's handling of such overflow. Typically, on screens in most browsers, the behavior will be "scroll": when content exceeds the available vertical space, the device allows you to scroll to access the overflowed content.

Syntax

The overflow-block feature is specified as a keyword value chosen from the list below.

none: Content that overflows the block axis is not displayed.
scroll: Content that overflows the block axis can be seen by scrolling to it.
optional-paged: Content that overflows the block axis can be seen by scrolling to it, but page breaks can be manually triggered (such as via break-inside, etc.) to cause the following content to display on the following page.
paged: Content is broken up into discrete pages; content that overflows one page in the block axis is displayed on the following page.

Examples

HTML

<p>
  Lorem ipsum dolor sit amet, consectetur adipiscing elit. Nullam ac turpis
  eleifend, fringilla velit ac, aliquam tellus. Vestibulum ante ipsum primis in
  faucibus orci luctus et ultrices posuere cubilia Curae; Nunc velit erat,
  tempus id rutrum sed, dapibus ut urna. Integer vehicula nibh a justo imperdiet
  rutrum. Nam faucibus pretium orci imperdiet sollicitudin. Nunc id facilisis
  dui. Proin elementum et massa et feugiat. Integer rutrum ullamcorper eleifend.
  Proin sit amet tincidunt risus. Sed nec augue congue eros accumsan tincidunt
  sed eget ex.
</p>

CSS

@media (overflow-block: scroll) {
  p {
    color: red;
  }
}

Result

Specifications

Specification
Media Queries Level 4 # mf-overflow-block

Browser compatibility

	Desktop					Mobile
	Chrome	Edge	Firefox	Opera	Safari	Chrome Android	Firefox for Android	Opera Android	Safari on iOS	Samsung Internet	WebView Android	WebView on iOS
`overflow-block`	113	113	66	99	17	113	66	76	17	23.0	113	17