style_media_change.html (1397B)
1 <!DOCTYPE html> 2 <html> 3 <head> 4 <meta charset="utf-8"> 5 <title>Dynamically changing HTMLStyleElement.media should change the rendering accordingly</title> 6 <script src="/resources/testharness.js"></script> 7 <script src="/resources/testharnessreport.js"></script> 8 <link rel="help" href="https://html.spec.whatwg.org/multipage/#the-style-element"> 9 <style> 10 span { 11 color: red; 12 } 13 </style> 14 <style id="text-style" media="none"> 15 span { 16 color: green; 17 } 18 </style> 19 <style id="body-style" media="aural"> 20 body { 21 color: green; 22 } 23 </style> 24 </head> 25 <body> 26 <span>text</span> 27 <script> 28 test(function() { 29 var element = document.querySelector("span"); 30 assert_equals(getComputedStyle(element).color, "rgb(255, 0, 0)"); 31 document.getElementById("text-style").media = 'all'; 32 assert_equals(getComputedStyle(element).color, "rgb(0, 128, 0)"); 33 }, "change media value dynamically"); 34 35 test(function() { 36 var style = document.getElementById("body-style"); 37 assert_not_equals(getComputedStyle(document.querySelector("body")).color, "rgb(0, 128, 0)"); 38 style.removeAttribute("media"); 39 assert_equals(getComputedStyle(document.querySelector("body")).color, "rgb(0, 128, 0)"); 40 }, "removing media attribute"); 41 </script> 42 </body> 43 </html>