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CSS Reference

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CSS Properties

accent-color align-content align-items align-self all animation animation-delay animation-direction animation-duration animation-fill-mode animation-iteration-count animation-name animation-play-state animation-timing-function aspect-ratio backdrop-filter backface-visibility background background-attachment background-blend-mode background-clip background-color background-image background-origin background-position background-position-x background-position-y background-repeat background-size block-size border border-block border-block-color border-block-end border-block-end-color border-block-end-style border-block-end-width border-block-start border-block-start-color border-block-start-style border-block-start-width border-block-style border-block-width border-bottom border-bottom-color border-bottom-left-radius border-bottom-right-radius border-bottom-style border-bottom-width border-collapse border-color border-end-end-radius border-end-start-radius border-image border-image-outset border-image-repeat border-image-slice border-image-source border-image-width border-inline border-inline-color border-inline-end border-inline-end-color border-inline-end-style border-inline-end-width border-inline-start border-inline-start-color border-inline-start-style border-inline-start-width border-inline-style border-inline-width border-left border-left-color border-left-style border-left-width border-radius border-right border-right-color border-right-style border-right-width border-spacing border-start-end-radius border-start-start-radius border-style border-top border-top-color border-top-left-radius border-top-right-radius border-top-style border-top-width border-width bottom box-decoration-break box-reflect box-shadow box-sizing break-after break-before break-inside caption-side caret-color @charset clear clip clip-path color column-count column-fill column-gap column-rule column-rule-color column-rule-style column-rule-width column-span column-width columns content counter-increment counter-reset counter-set cursor direction display empty-cells filter flex flex-basis flex-direction flex-flow flex-grow flex-shrink flex-wrap float font @font-face font-family font-feature-settings font-kerning font-size font-size-adjust font-stretch font-style font-variant font-variant-caps font-weight gap grid grid-area grid-auto-columns grid-auto-flow grid-auto-rows grid-column grid-column-end grid-column-gap grid-column-start grid-gap grid-row grid-row-end grid-row-gap grid-row-start grid-template grid-template-areas grid-template-columns grid-template-rows hanging-punctuation height hyphens hyphenate-character image-rendering @import inline-size inset inset-block inset-block-end inset-block-start inset-inline inset-inline-end inset-inline-start isolation justify-content justify-items justify-self @keyframes left letter-spacing line-height list-style list-style-image list-style-position list-style-type margin margin-block margin-block-end margin-block-start margin-bottom margin-inline margin-inline-end margin-inline-start margin-left margin-right margin-top mask-image mask-mode mask-origin mask-position mask-repeat mask-size max-block-size max-height max-inline-size max-width @media min-block-size min-inline-size min-height min-width mix-blend-mode object-fit object-position offset offset-anchor offset-distance offset-path offset-rotate opacity order orphans outline outline-color outline-offset outline-style outline-width overflow overflow-anchor overflow-wrap overflow-x overflow-y overscroll-behavior overscroll-behavior-block overscroll-behavior-inline overscroll-behavior-x overscroll-behavior-y padding padding-block padding-block-end padding-block-start padding-bottom padding-inline padding-inline-end padding-inline-start padding-left padding-right padding-top page-break-after page-break-before page-break-inside paint-order perspective perspective-origin place-content place-items place-self pointer-events position quotes resize right rotate row-gap scale scroll-behavior scroll-margin scroll-margin-block scroll-margin-block-end scroll-margin-block-start scroll-margin-bottom scroll-margin-inline scroll-margin-inline-end scroll-margin-inline-start scroll-margin-left scroll-margin-right scroll-margin-top scroll-padding scroll-padding-block scroll-padding-block-end scroll-padding-block-start scroll-padding-bottom scroll-padding-inline scroll-padding-inline-end scroll-padding-inline-start scroll-padding-left scroll-padding-right scroll-padding-top scroll-snap-align scroll-snap-stop scroll-snap-type scrollbar-color tab-size table-layout text-align text-align-last text-decoration text-decoration-color text-decoration-line text-decoration-style text-decoration-thickness text-emphasis text-emphasis-color text-emphasis-position text-emphasis-style text-indent text-justify text-orientation text-overflow text-shadow text-transform text-underline-offset text-underline-position top transform transform-origin transform-style transition transition-delay transition-duration transition-property transition-timing-function translate unicode-bidi user-select vertical-align visibility white-space widows width word-break word-spacing word-wrap writing-mode z-index



CSS break-before Property


Example

Always insert a page-break before a <h1> element: 

@media print {
  h1 {
    break-before: always;
  }
}


Definition and Usage

The break-before property specifies whether or not a page break, column break, or region break should occur before the specified element.

The break-before property extends the CSS2 page-break-before property.

Using break-before, you can tell the browser to break the page, column, or region before the element the break-before property is applied to, or avoid the element to be split and span across two pages.

Default value: auto
Inherited: no
Animatable: no. Read about animatable
Version: CSS3
JavaScript syntax: object.style.breakBefore="always"

Browser Support

The numbers in the table specify the first browser version that fully supports the property.

Property
break-before 50.0 10.0 65.0 10.0 37.0


CSS Syntax

break-before: auto|all|always|avoid|avoid-column|avoid-page|avoid-region|column|left|page|recto|region|right|verso|initial|inherit;

Property Values

Value Description
auto Default. Automatic page/column/region break before the element
all Always insert a page-break right before the principal box
always Always insert a page-break before the element
avoid Avoid a page/column/region break before the element
avoid-column Avoid a column-break before the element
avoid-page Avoid a page-break before the element
avoid-region Avoid a region-break before the element
column Always insert a column-break before the element
left Insert one or two page-breaks before the element so that the next page is formatted as a left page
page Always insert a page-break before the element
recto Insert one or two page-breaks before the principal box so that the next page is formatted as a recto page
region Always insert a region-break before the element
right Insert one or two page-breaks before the element so that the next page is formatted as a right page
verso Insert one or two page-breaks before the principal box so that the next page is formatted as a verso page
initial Sets this property to its default value. Read about initial
inherit Inherits this property from its parent element. Read about inherit

More Examples

Example

To assure that all new chapters should start on a right page (like in a book) when printed, you can use break-before: right for all <h1> elements: 

@media print {
  h1 {
    break-before: right;
  }
}

Example

Always insert a region-break before <ul> elements in a region: 

.region ul {
    break-before: region;
  }
}