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<!DOCTYPE html>
<html class=reftest-wait>
<title>View transitions: ensure :only-child is supported on view-transition-old</title>
<link rel="help" href="https://github.com/WICG/view-transitions">
<link rel="author" href="mailto:khushalsagar@chromium.org">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<style>
::view-transition-old(root) {
background-color: blue;
}
::view-transition-old(target) {
background-color: blue;
}
::view-transition-old(*) {
color: blue;
}
::view-transition-old(root):only-child {
background-color: red;
}
::view-transition-old(target):only-child {
background-color: red;
}
::view-transition-old(*):only-child {
color: red;
}
#target {
contain: layout;
}
</style>
<div id="target"></div>
<script>
let matchedColor = "rgb(255, 0, 0)";
let notMatchedColor = "rgb(0, 0, 255)";
promise_test(() => {
return new Promise(async (resolve, reject) => {
document.documentElement.style.viewTransitionName = "root";
target.style.viewTransitionName = "none";
let transition = document.startViewTransition(() => {
document.documentElement.style.viewTransitionName = "none";
});
transition.ready.then(() => {
let style = getComputedStyle(
document.documentElement, ":view-transition-old(root)");
if (style.backgroundColor == matchedColor && style.color == matchedColor)
resolve();
else
reject(style.backgroundColor + " and " + style.color);
});
});
}, ":only-child should match because ::view-transition-new is not generated (root to none)");
promise_test(() => {
return new Promise(async (resolve, reject) => {
document.documentElement.style.viewTransitionName = "root";
target.style.viewTransitionName = "none";
let transition = document.startViewTransition();
transition.ready.then(() => {
let style = getComputedStyle(
document.documentElement, ":view-transition-old(root)");
if (style.backgroundColor == notMatchedColor && style.color == notMatchedColor)
resolve();
else
reject(style.backgroundColor + " and " + style.color);
});
});
}, ":only-child should not match because ::view-transition-new is generated (root to root)");
promise_test(() => {
return new Promise(async (resolve, reject) => {
document.documentElement.style.viewTransitionName = "root";
target.style.viewTransitionName = "none";
let transition = document.startViewTransition(() => {
document.documentElement.style.viewTransitionName = "none";
target.style.viewTransitionName = "root";
});
transition.ready.then(() => {
let style = getComputedStyle(
document.documentElement, ":view-transition-old(root)");
if (style.backgroundColor == notMatchedColor && style.color == notMatchedColor)
resolve();
else
reject(style.backgroundColor + " and " + style.color);
});
});
}, ":only-child should not match because ::view-transition-new is generated (root to element)");
promise_test(() => {
return new Promise(async (resolve, reject) => {
target.style.viewTransitionName = "target";
document.documentElement.style.viewTransitionName = "none";
let transition = document.startViewTransition(() => {
target.style.viewTransitionName = "none";
});
transition.ready.then(() => {
let style = getComputedStyle(
document.documentElement, ":view-transition-old(target)");
if (style.backgroundColor == matchedColor && style.color == matchedColor)
resolve();
else
reject(style.backgroundColor + " and " + style.color);
});
});
}, ":only-child should match because ::view-transition-new is not generated (element to none)");
promise_test(() => {
return new Promise(async (resolve, reject) => {
target.style.viewTransitionName = "root";
document.documentElement.style.viewTransitionName = "none";
let transition = document.startViewTransition(() => {
document.documentElement.style.viewTransitionName = "root";
target.style.viewTransitionName = "none";
});
transition.ready.then(() => {
let style = getComputedStyle(
document.documentElement, ":view-transition-old(root)");
if (style.backgroundColor == notMatchedColor && style.color == notMatchedColor)
resolve();
else
reject(style.backgroundColor + " and " + style.color);
});
});
}, ":only-child should not match because ::view-transition-new is generated (element to root)");
promise_test(() => {
return new Promise(async (resolve, reject) => {
target.style.viewTransitionName = "target";
document.documentElement.style.viewTransitionName = "none";
let transition = document.startViewTransition();
transition.ready.then(() => {
let style = getComputedStyle(
document.documentElement, ":view-transition-old(target)");
if (style.backgroundColor == notMatchedColor && style.color == notMatchedColor)
resolve();
else
reject(style.backgroundColor + " and " + style.color);
});
});
}, ":only-child should not match because ::view-transition-new is generated (element to element)");
</script>
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