break-inside

Summary

The break-inside CSS property describes how the page, column or region break inside the generated box. If there is no generated box, the property is ignored.

Each possible break point, that is each element boundary, is under the influence of three properties, the break-after value of the previous element, the break-before value of the next element and the break-inside of the containing element.

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

1. If any of the three concerned values is a forced break value, that is always, left, right, page, column or region, it has precedence. If several of the concerned values is such a break, the one of the element that appears the latest in the flow is taken (that is the break-before value has precedence over the break-after value, which itself has precedence over the break-inside value).
2. If any of the three concerned values is an avoid break value, that is avoid, avoid-page, avoid-region, 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.

Syntax

break-inside: auto;
break-inside: avoid;
break-inside: avoid-page;
break-inside: avoid-column;
break-inside: avoid-region;

Values

auto

Allows, meaning neither forbid nor force, any break (either page, column or region) to be be inserted within the principle box.

avoid-page

Avoid any page break within the principle box.

avoid-column

Avoid any column break within the principle box.

avoid-region

Avoid any region break within the principle box.

Formal syntax

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

Specifications

Browser compatibility

[*] WebKit and Blink browsers don't support this property, but some have the non-standard -webkit-column-break-before and -webkit-region-break-before with similar parameters as page-break-before.