break-before

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

Generic break values

auto

Allows, but does not force, any break (page, column, or region) to be inserted right before the principal box.

avoid

Avoids any break (page, column, or region) from being inserted right before the principal box.

always Experimental

Forces a page break right after the principal box. The type of this break is that of the immediately-containing fragmentation context. If we are inside a multicol container then it would force a column break, inside paged media (but not inside a multicol container) a page break.

all Experimental

Forces a page break right after the principal box. Breaking through all possible fragmentation contexts. So a break inside a multicol container, which was inside a page container would force a column and page break.

Page break values

avoid-page

Avoids any page break right before the principal box.

page

Forces a page break right before the principal box.

left

Forces one or two page breaks right before the principal box, whichever will make the next page into a left page. It's the page placed on the left side of the spine of the book or the back side of the page in duplex printing.

right

Forces one or two page breaks right before the principal box, whichever will make the next page into a right page. It's the page placed on the right side of the spine of the book or the front side of the page in duplex printing.

recto Experimental

Forces one or two page breaks right before the principal box, whichever will make the next page into a recto page. (A recto page is a right page in a left-to-right spread or a left page in a right-to-left spread.)

verso Experimental

Forces one or two page breaks right before the principal box, whichever will make the next page into a verso page. (A verso page is a left page in a left-to-right spread or a right page in a right-to-left spread.)

Column break values

avoid-column

Avoids any column break right before the principal box.

column

Forces a column break right before the principal box.

Region break values

avoid-region Experimental

Avoids any region break right before the principal box.

region Experimental

Forces a region break right before the principal box.

For compatibility reasons, the legacy page-break-before property should be treated by browsers as an alias of break-before. This ensures that sites using page-break-before continue to work as designed. A subset of values should be aliased as follows:

break-before = 
  auto          |
  avoid         |
  always        |
  all           |
  avoid-page    |
  page          |
  left          |
  right         |
  recto         |
  verso         |
  avoid-column  |
  column        |
  avoid-region  |
  region        

In the following example we have a container that contains an <h1> spanning all columns (achieved using column-span: all) and a series of <h2>s and paragraphs laid out in multiple columns using column-width: 200px.

By default, the subheadings and paragraphs were laid out rather messily because the headings were not in a uniform place. However, we used break-before: column on the <h2> elements to force a column break before each one, meaning that you end up with an <h2> neatly at the top of each column.

HTML

<article>
  <h1>Main heading</h1>

  <h2>Subheading</h2>

  <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Nulla vitae fringilla mauris. Quisque commodo eget nisi sed pretium. Mauris luctus nec lacus in ultricies. Mauris vitae hendrerit arcu, ac scelerisque lacus. Aliquam lobortis in lacus sit amet posuere. Fusce iaculis urna id neque dapibus, eu lacinia lectus dictum.</p>

  <h2>Subheading</h2>

  <p>Praesent condimentum dui dui, sit amet rutrum diam tincidunt eu. Cras suscipit porta leo sit amet rutrum. Sed vehicula ornare tincidunt. Curabitur a ipsum ac diam mattis volutpat ac ut elit. Nullam luctus justo non vestibulum gravida. Morbi metus libero, pharetra non porttitor a, molestie nec nisi.</p>

  <h2>Subheading</h2>

  <p>Vivamus eleifend metus vitae neque placerat, eget interdum elit mattis. Donec eu vulputate nibh. Ut turpis leo, malesuada quis nisl nec, volutpat egestas tellus.

  <h2>Subheading</h2>

  <p>In finibus viverra enim vel suscipit. Quisque consequat velit eu orci malesuada, ut interdum tortor molestie. Proin sed pellentesque augue. Nam risus justo, faucibus non porta a, congue vel massa. Cras luctus lacus nisl, sed tincidunt velit pharetra ac. Duis suscipit faucibus dui sed ultricies.</p>
</article>

CSS

html {
  font-family: helvetica, arial, sans-serif;
}

h1 {
  font-size: 3rem;
  letter-spacing: 2px;
  column-span: all;
}

h2 {
  font-size: 1.2rem;
  color: red;
  letter-spacing: 1px;
  break-before: column;
}

p {
  line-height: 1.5;
}

article {
  column-width: 200px;
  gap: 20px;
}

• Multiple-column Layout
• Breaking Boxes With CSS Fragmentation