::view-transition-image-pair()

Limited availability

This feature is not Baseline because it does not work in some of the most widely-used browsers.

The ::view-transition-image-pair() CSS pseudo-element represents a container for a view transition's "old" and "new" view states — before and after the transition.

During a view transition, ::view-transition-image-pair() is included in the associated pseudo-element tree as explained in The view transition pseudo-element tree. It is only ever a child of a ::view-transition-group(). In terms of children, it can have a ::view-transition-new() or a ::view-transition-old(), or both.

::view-transition-image-pair() is given the following default styling in the UA stylesheet:

css

:root::view-transition-image-pair(*) {
  position: absolute;
  inset: 0;

  animation-duration: inherit;
  animation-fill-mode: inherit;
  animation-delay: inherit;
}

During a view transition, ::view-transition-image-pair() has isolation: isolate set on it in the view transition style sheet so that its children can be blended with non-normal blend modes without affecting other visual outputs.

Syntax

css

::view-transition-image-pair([ <pt-name-selector> <pt-class-selector>? ] | <pt-class-selector>) {
  /* ... */
}

Parameters

*: The universal selector (*); selects all view transition groups on a page.
root: Causes the pseudo-element to match the default root view transition snapshot group created by the user agent to contain the view transition for the overall page. This group includes any element not assigned to its own specific view transition snapshot group via the view-transition-name property.
<pt-name-selector>: The <custom-ident> set as the value of the view-transition-name property.
<pt-class-selector>: The <custom-ident> set as the value of the view-transition-class property preceded by a period (.).

Examples

css

::view-transition-image-pair(root) {
  isolation: auto;
}

::view-transition-image-pair(.card) {
  isolation: isolate;
}

Specifications

Specification
CSS View Transitions Module Level 1 # ::view-transition-image-pair