The break-inside CSS property defines how page, column, or region breaks should behave inside a generated box. If there is no generated box, the property is ignored.

/* Keyword values */
break-inside: auto;
break-inside: avoid;
break-inside: avoid-page;
break-inside: avoid-column;
break-inside: avoid-region;

/* Global values */
break-inside: inherit;
break-inside: initial;
break-inside: unset;

Each possible break point (in other words, each element boundary) is affected by three properties: the break-after value of the previous element, the break-before value of the next element, and the break-inside value of the containing element.

To determine if a break must be done, the following rules are applied:

  1. If any of the three concerned values is a forced break value (always, left, right, page, column, or region), it has precedence. If more than one of them are such a break, the value of the element that appears the latest in the flow is used. Thus, the break-before value has precedence over the break-after value, which in turn has precedence over the break-inside value.
  2. If any of the three concerned values is an avoid break value (avoid, avoid-page, avoid-region, or avoid-column), no such break will be applied at that point.

Once forced breaks have been applied, soft breaks may be added if needed, but not on element boundaries that resolve in a corresponding avoid value.

Initial value auto
Applies to block-level elements
Inherited no
Media paged
Computed value as specified
Animation type discrete
Canonical order the unique non-ambiguous order defined by the formal grammar


The break-inside property is specified as one of the keyword values from the list below.


Allows, but does not force, any break (page, column, or region) to be be inserted within the principle box.
Avoids any break (page, column, or region) from being inserted within the principal box.
Avoids any page break within the principle box.
Avoids any column break within the principle box.
Avoids any region break within the principle box.

Formal syntax

auto | avoid | avoid-page | avoid-column | avoid-region


Browser compatibilityUpdate compatibility data on GitHub

Chrome Edge Firefox Internet Explorer Opera Safari
Basic support 50 12 No 10 37
11.1 — 12.1
column and avoid-column No No No 10 11.1 — 12.1 No
recto and verso No No No No No No
region and avoid-region No No No No No No
Android webview Chrome for Android Edge Mobile Firefox for Android Opera for Android iOS Safari Samsung Internet
Basic support 50 50 Yes No ? 10 5.0
column and avoid-column No ? No No ? No No
recto and verso No ? No No No No No
region and avoid-region No ? No No No No No

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