Printing Events
Window fires `beforeprint` and `afterprint` events so the printed document can be annotated.
CSS Generated content for pseudo-elements
Method of displaying text or images before or after the given element's contents using the ::before and ::after pseudo-elements. All browsers with support also support the `attr()` notation in the `content` property.
CSS page-break properties
Properties to control the way elements are broken across (printed) pages.
DOM manipulation convenience methods
jQuery-like methods on DOM nodes to insert nodes around or within a node, or to replace one node with another. These methods accept any number of DOM nodes or HTML strings as arguments. Includes: `ChildNode.before`, `ChildNode.after`, `ChildNode.replaceWith`, `ParentNode.prepend`, and `ParentNode.append`.
beforeinstallpromptevent api
beforeinstallpromptevent api: `beforeinstallpromptevent()` constructor
beforeinstallpromptevent api: platforms
beforeinstallpromptevent api: prompt
beforeinstallpromptevent api: userchoice
beforeunloadevent api
beforeunloadevent api: returnvalue
beforeunloadevent api: user interaction required for dialog box
characterdata api: before
documenttype api: before
document api: `beforescriptexecute` event
element api: before
element api: `beforematch` event
element api: `beforescriptexecute` event
element api: `beforexrselect` event
htmlelement api: `beforeinput` event
htmlelement api: `beforematch` event
htmlelement api: `beforetoggle` event
htmlselectelement api: add: index as `before` parameter
nodeiterator api: pointerbeforereferencenode
node api: insertbefore
range api: setendbefore
range api: setstartbefore
svglengthlist api: insertitembefore
svgnumberlist api: insertitembefore
svgpointlist api: insertitembefore
svgstringlist api: insertitembefore
window api: `beforeinstallprompt` event
window api: `beforeprint` event
window api: `beforeunload` event
window api: `beforeunload` event: activation using `event.returnvalue = "string";`
window api: `beforeunload` event: activation using `event.preventdefault()`
window api: `beforeunload` event: activation using `return "string";`
css property: -webkit-border-before
css property: break-before
css property: break-before: supported in multi-column layout
css property: break-before: supported in multi-column layout: `always`
css property: break-before: supported in multi-column layout: `avoid`
css property: break-before: supported in multi-column layout: `avoid-column`
css property: break-before: supported in multi-column layout: `column`
css property: break-before: supported in paged media
css property: break-before: supported in paged media: `always`
css property: break-before: supported in paged media: `page` and `avoid-page`
css property: break-before: supported in paged media: `recto` and `verso`
css property: page-break-before
css selector: `::before`: animation and transition support
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