overflow-block

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

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

Syntax

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

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

The overflow-block property is specified as a single <overflow> keyword value:

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.

clip

Overflow content is clipped at the element's overflow clip edge that is defined using the overflow-clip-margin property.

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.

Formal definition

Initial valueauto
Applies toBlock-containers, flex containers, and grid containers
Inheritedno
Computed valueas specified, except with visible/clip computing to auto/hidden respectively if one of overflow-x or overflow-y is neither visible nor clip
Animation typediscrete

Formal syntax

overflow-block = 
  visible  |
  hidden   |
  clip     |
  scroll   |
  auto

Examples

HTML

html
<ul>
  <li>
    <code>overflow-block: hidden</code> (hides the text outside the box)
    <div id="hidden">
      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="scroll">
      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: clip</code> (hides the text outside the box beyond the
    overflow clip edge)
    <div id="clip">
      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="visible">
      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 browsers, equivalent to
    <code>scroll</code>)
    <div id="auto">
      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

css
div {
  border: 1px solid black;
  width: 250px;
  height: 100px;
  margin-bottom: 120px;
}

#hidden {
  overflow-block: hidden;
}
#scroll {
  overflow-block: scroll;
}
#scroll {
  overflow-block: clip;
}
#visible {
  overflow-block: visible;
}
#auto {
  overflow-block: auto;
}

Result

Specifications

Specification
CSS Overflow Module Level 3
# overflow-control

Browser compatibility

BCD tables only load in the browser

See also