focus-visible-001.html (2468B)
1 <!DOCTYPE html> 2 <html> 3 <head> 4 <meta charset="utf-8" /> 5 <title>CSS Test (Selectors): Keyboard focus enables :focus-visible</title> 6 <link rel="author" title="Rob Dodson" href="robdodson@chromium.org" /> 7 <link rel="help" href="https://drafts.csswg.org/selectors-4/#the-focus-visible-pseudo" /> 8 <script src="/resources/testharness.js"></script> 9 <script src="/resources/testharnessreport.js"></script> 10 <script src="/resources/testdriver.js"></script> 11 <script src="/resources/testdriver-actions.js"></script> 12 <script src="/resources/testdriver-vendor.js"></script> 13 <style> 14 @supports not selector(:focus-visible) { 15 :focus { 16 outline: red solid 5px; 17 background-color: red; 18 } 19 } 20 21 :focus-visible { 22 outline: green solid 5px; 23 } 24 25 :focus:not(:focus-visible) { 26 outline: 0; 27 background-color: red; 28 } 29 </style> 30 </head> 31 <body> 32 This test checks that using the Tab key to navigate focus to an element triggers <code>:focus-visible</code> matching. 33 <ol id="instructions"> 34 <li>If the user-agent does not claim to support the <code>:focus-visible</code> pseudo-class then SKIP this test.</li> 35 <li>Use the TAB key on the keyboard to focus the element below that says "Focus me."</li> 36 <li>If the element has a red background, then the test result is FAILURE. If the element has a green outline, then the test result is SUCCESS.</li> 37 </ol> 38 <br> 39 <div id="el" tabindex="0">Focus me.</div> 40 <script> 41 async_test(function(t) { 42 el.addEventListener("focus", t.step_func_done(function() { 43 assert_equals(getComputedStyle(el).outlineColor, "rgb(0, 128, 0)", `outlineColor for ${el.tagName}#${el.id} should be green`); 44 assert_not_equals(getComputedStyle(el).backgroundColor, "rgb(255, 0, 0)", `backgroundColor for ${el.tagName}#${el.id} should NOT be red`); 45 46 let focusVisiblePseudoAll = document.querySelectorAll(':focus-visible'); 47 assert_equals(focusVisiblePseudoAll.length, 1, "Only 1 element matches ':focus-visible'"); 48 let focusVisiblePseudo = document.querySelector(':focus-visible'); 49 assert_equals(el, focusVisiblePseudo, "${el.tagName}#${el.id} matches ':focus-visible'"); 50 })); 51 const tab_key = '\ue004'; 52 test_driver.send_keys(el, tab_key) 53 .catch(e => t.step_func(() => assert_unreached("Actions sequence failed " + e))); 54 }, "Keyboard focus should match :focus-visible"); 55 </script> 56 </body> 57 </html>