Riferimento CSS

Riferimento CSS Supporto del browser CSS Selettori CSS Funzioni CSS CSS di riferimento sonoro Font sicuri per il Web CSS Font CSS di riserva CSS Animabile Unità CSS Convertitore CSS PX-EM Colori CSS Valori di colore CSS Valori predefiniti CSS Entità CSS

CSS Properties

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 backface-visibility background background-attachment background-blend-mode background-clip background-color background-image background-origin background-position background-repeat background-size border border-bottom border-bottom-color border-bottom-left-radius border-bottom-right-radius border-bottom-style border-bottom-width border-collapse border-color border-image border-image-outset border-image-repeat border-image-slice border-image-source border-image-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-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-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 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 image-rendering @import isolation justify-content @keyframes left letter-spacing line-height list-style list-style-image list-style-position list-style-type margin margin-bottom margin-left margin-right margin-top mask-image mask-mode mask-origin mask-position mask-repeat mask-size max-height max-width @media min-height min-width mix-blend-mode object-fit object-position opacity order orphans outline outline-color outline-offset outline-style outline-width overflow overflow-wrap overflow-x overflow-y padding padding-bottom padding-left padding-right padding-top page-break-after page-break-before page-break-inside perspective perspective-origin pointer-events position quotes resize right row-gap scroll-behavior tab-size table-layout text-align text-align-last text-decoration text-decoration-color text-decoration-line text-decoration-style text-indent text-justify text-overflow text-shadow text-transform top transform transform-origin transform-style transition transition-delay transition-duration transition-property transition-timing-function 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


Esempio

Inserisci sempre un'interruzione di pagina prima di un elemento <h1>: 

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


Definizione e utilizzo

La break-beforeproprietà specifica se deve verificarsi o meno un'interruzione di pagina, di colonna o di area prima dell'elemento specificato.

La break-beforeproprietà estende la proprietà CSS2 . page-break-before

Utilizzando break-before, puoi indicare al browser di interrompere la pagina, la colonna o l'area prima dell'elemento a cui break-before viene applicata la proprietà oppure evitare che l'elemento venga diviso e si estenda su due pagine.

Valore di default: auto
Ereditato: no
Animabile: no. Leggi su animabile
Versione: CSS3
sintassi JavaScript: oggetto .style.breakBefore="sempre"

Supporto browser

I numeri nella tabella specificano la prima versione del browser che supporta completamente la proprietà.

Property
break-before 50.0 10.0 65.0 10.0 37.0


Sintassi CSS

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

Valori di proprietà

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

Altri esempi

Esempio

Per assicurarti che tutti i nuovi capitoli inizino su una pagina giusta (come in un libro) una volta stampati, puoi usare break-before: right per tutti gli elementi <h1>: 

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

Esempio

Inserisci sempre un'interruzione di regione prima degli elementi <ul> in una regione: 

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