overflow-block

The overflow-block CSS property sets what shows when content overflows a block-level element's block start and block end edges. This may be nothing, a scroll bar, or the overflow content.

The overflow-block property maps to overflow-y or overflow-x depending on the writing mode of the document.

Syntax

/* Keyword values */
overflow-block: visible;
overflow-block: hidden;
overflow-block: scroll;
overflow-block: auto;

/* Global values */
overflow-block: inherit;
overflow-block: initial;
overflow-block: unset;

The overflow-block property is specified as a single keyword chosen from the list of values below.

Values

visible
Content is not clipped and may be rendered outside the padding box's block start and block end edges.
hidden
Content is clipped if necessary to fit the block dimension in the padding box. No scrollbars are provided.
scroll
Content is clipped if necessary to fit in the block dimension in the padding box. Browsers display scrollbars whether or not any content is actually clipped. (This prevents scrollbars from appearing or disappearing when the content changes.) Printers may still print overflowing content.
auto
Depends on the user agent. If content fits inside the padding box, it looks the same as visible, but still establishes a new block-formatting context. Desktop browsers provide scrollbars if content overflows.

Formal syntax

visible | hidden | clip | scroll | auto

Examples

HTML

<ul>
  <li><code>overflow-block:hidden</code> — hides the text outside the box
  <div id="div1">
    Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur.
    </div>
  </li>

  <li><code>overflow-block:scroll</code> — always adds a scrollbar
  <div id="div2">
    Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur.
    </div>
  </li>

  <li><code>overflow-block:visible</code> — displays the text outside the box if needed
  <div id="div3">
    Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur.
    </div>
  </li>

  <li><code>overflow-block:auto</code> — on most browser, equivalent to <code>scroll</code>
  <div id="div4">
    Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur.
    </div>
  </li>
</ul>
  

CSS

#div1,
#div2,
#div3,
#div4 {
  border: 1px solid black;
  width:  250px;
  height: 100px;
}

#div1 { overflow-block: hidden; margin-bottom: 12px;}
#div2 { overflow-block: scroll; margin-bottom: 12px;}
#div3 { overflow-block: visible; margin-bottom: 120px;}
#div4 { overflow-block: auto; margin-bottom: 120px;}

Result

Specifications

Specification Status Comment
CSS Overflow Module Level 3
The definition of 'overflow-block' in that specification.
Working Draft  
Initial valueauto
Applies toBlock-containers, flex containers, and grid containers
Inheritedno
Mediavisual
Computed valueas specified
Animation typediscrete
Canonical orderper grammar

Browser compatibility

Update compatibility data on GitHub
DesktopMobile
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidFirefox for AndroidOpera for AndroidSafari on iOSSamsung Internet
overflow-block
Experimental
Chrome No support NoEdge No support NoFirefox Full support 69IE No support NoOpera No support NoSafari No support NoWebView Android No support NoChrome Android No support NoFirefox Android No support NoOpera Android No support NoSafari iOS No support NoSamsung Internet Android No support No

Legend

Full support  
Full support
No support  
No support
Experimental. Expect behavior to change in the future.
Experimental. Expect behavior to change in the future.

See also