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overflow-clip-box

Non-standard
This feature is non-standard and is not on a standards track. Do not use it on production sites facing the Web: it will not work for every user. There may also be large incompatibilities between implementations and the behavior may change in the future.

The overflow-clip-box CSS property specifies relative to which box the clipping happens when there is an overflow.

On Gecko, by default, padding-box is used everywhere, but <input type="text"> and similar use the value content-box. Prior to Firefox 29, this behavior was hardcoded; since then it uses this property that can be used elsewhere too. Note that this property is activated by default only in the UA stylesheet and chrome contexts.

Initial value	`padding-box`
Applies to	all elements
Inherited	no
Media	visual
Computed value	as specified
Animatable	no
Canonical order	the unique non-ambiguous order defined by the formal grammar

Syntax

/* Keyword values */
overflow-clip-box: padding-box;
overflow-clip-box: content-box;

/* Global values */
overflow-clip-box: inherited;
overflow-clip-box: initial;
overflow-clip-box: unset;

Values

padding-box: This keyword makes the clipping be related to the padding box.
content-box: This keyword makes the clipping be related to the content box.

Formal syntax

padding-box | content-box

Examples

padding-box

<div class="things">
  <input value="ABCDEFGHIJKLMNOPQRSTUVWXYZÅÄÖ" class="scroll padding-box">
  <div class="scroll padding-box"><span>ABCDEFGHIJKLMNOPQRSTUVWXYZÅÄÖ</span></div>
</div>

.scroll { 
  overflow: auto;
  padding: 0 30px; 
  width: 6em; 
  border: 1px solid black;
  background: lime content-box;
}

.padding-box {
  overflow-clip-box: padding-box;
}

function scrollSomeElements() {
  var elms = document.querySelectorAll('.scroll');
  for (i=0; i < elms.length; ++i) {
    elms[i].scrollLeft=80;
  }
}
var elt = document.queryElementsByTagName('body')[0];

elt.addEventListener("load", scrollSomeElements, false);

Specifications

This property has been proposed to the W3C CSSWG; it is not yet on the standard track but, if accepted, should appear in CSS Overflow Module Level 3.

Browser compatibility

Feature	Firefox (Gecko)	Chrome	Internet Explorer	Opera	Safari (WebKit)
Basic support	29.0 (29.0)^[1]	No support	No support	No support	No support

Feature	Firefox Mobile (Gecko)	Android	IE Phone	Opera Mobile	Safari Mobile
Basic support	29.0 (29.0)^[1]	No support	No support	No support	No support

[1] This property is controlled by the layout.css.overflow-clip-box.enabled preference, which defaults to false. It only is activated inside UA stylesheets and the chrome context. See bug 966992.

overflow-clip-box