prefers-reduced-data.html (1429B)
1 <!DOCTYPE html> 2 <link rel="help" href="https://drafts.csswg.org/mediaqueries-5/#prefers-reduced-data" /> 3 <script type="text/javascript" src="/resources/testharness.js"></script> 4 <script type="text/javascript" src="/resources/testharnessreport.js"></script> 5 6 <script type="text/javascript" src="resources/matchmedia-utils.js"></script> 7 <script> 8 query_should_be_known("(prefers-reduced-data)"); 9 query_should_be_known("(prefers-reduced-data: no-preference)"); 10 query_should_be_known("(prefers-reduced-data: reduce)"); 11 12 query_should_be_unknown("(prefers-reduced-data: 0)"); 13 query_should_be_unknown("(prefers-reduced-data: none)"); 14 query_should_be_unknown("(prefers-reduced-data: 10px)"); 15 query_should_be_unknown("(prefers-reduced-data: no-preference reduce)"); 16 query_should_be_unknown("(prefers-reduced-data: reduced)"); 17 query_should_be_unknown("(prefers-reduced-data: no-preference/reduce)"); 18 19 test(() => { 20 // https://drafts.csswg.org/mediaqueries-5/#boolean-context 21 let booleanContext = window.matchMedia("(prefers-reduced-data)"); 22 let noPreference = window.matchMedia("(prefers-reduced-data: no-preference)"); 23 assert_equals(booleanContext.matches, !noPreference.matches); 24 }, "Check that no-preference evaluates to false in the boolean context"); 25 26 test(() => { 27 let invalid = window.matchMedia("(prefers-reduced-data: 10px)"); 28 assert_equals(invalid.matches, false); 29 }, "Check that invalid evaluates to false"); 30 </script>