only-child-view-transition.html (1043B)
1 <!DOCTYPE html> 2 <html class=reftest-wait> 3 <title>View transitions: ensure :only-child is supported on view-transition</title> 4 <link rel="help" href="https://drafts.csswg.org/css-view-transitions-1/"> 5 <link rel="author" href="mailto:khushalsagar@chromium.org"> 6 7 <script src="/resources/testharness.js"></script> 8 <script src="/resources/testharnessreport.js"></script> 9 10 <style> 11 ::view-transition { 12 background-color: red; 13 } 14 ::view-transition:only-child { 15 background-color: blue; 16 } 17 </style> 18 19 <script> 20 promise_test(() => { 21 assert_implements(document.startViewTransition, "Missing document.startViewTransition"); 22 return new Promise(async (resolve, reject) => { 23 let transition = document.startViewTransition(); 24 transition.ready.then(() => { 25 let style = getComputedStyle( 26 document.documentElement, "::view-transition"); 27 if (style.backgroundColor == "rgb(255, 0, 0)") 28 resolve(); 29 else 30 reject(style.backgroundColor); 31 }); 32 }); 33 }, ":only-child is not supported on view-transition"); 34 </script>