wpt/css/css-view-transitions/event-pseudo-name.html at master · web-platform-tests/wpt · GitHub

Name: wpt/css/css-view-transitions/event-pseudo-name.html at master · web-platform-tests/wpt · GitHub
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<!DOCTYPE html>
<title>View transitions: event pseudo name</title>
<linkrel="help" href="https://drafts.csswg.org/css-view-transitions-1/">
<linkrel="author" href="mailto:vmpstr@chromium.org">

<scriptsrc="/resources/testharness.js"></script>
<scriptsrc="/resources/testharnessreport.js"></script>

<style>
:root { view-transition-name: none; }
#first {
background: blue;
width:100px;
height:100px;
view-transition-name: shared;
}

html::view-transition-group(*),
html::view-transition-image-pair(*),
html::view-transition-new(*),
html::view-transition-old(*) {
animation-duration:600s;
}

@keyframes fade-in {
from { opacity:0; }
}
html::view-transition-image-pair(*) {
animation: fade-in 600s both;
}

</style>
<divid=first></div>
<script>
async_test(t=>{
assert_implements(document.startViewTransition,"Missing document.startViewTransition");
letgroupAnimationCount=0;
letoldAnimationCount=0;
letnewAnimationCount=0;
letwrapperAnimationCount=0;

document.documentElement.addEventListener("animationstart",(e)=>{
letpseudo=e.pseudoElement;
if(pseudo=="::view-transition-group(shared)"){
groupAnimationCount++;
}elseif(pseudo=="::view-transition-new(shared)"){
newAnimationCount++;
}elseif(pseudo=="::view-transition-old(shared)"){
oldAnimationCount++;
}elseif(pseudo="::view-transition-image-pair(shared)"){
wrapperAnimationCount++;
}

lettotal=
groupAnimationCount+oldAnimationCount+newAnimationCount+wrapperAnimationCount;
// Old/new images have 2 animations : opacity and mix-blend-mode.
if(total==6){
t.step(()=>assert_equals(groupAnimationCount,1));
t.step(()=>assert_equals(wrapperAnimationCount,1));
t.step(()=>assert_equals(oldAnimationCount,2));
t.step(()=>assert_equals(newAnimationCount,2));
t.done();
}
});
document.startViewTransition();
},"verifies pseudo name includes a tag");

</script>