prefers-reduced-motion.html (1457B)
1 <!DOCTYPE html> 2 <link rel="help" href="https://drafts.csswg.org/mediaqueries-5/#prefers-reduced-motion" /> 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-motion)"); 9 query_should_be_known("(prefers-reduced-motion: no-preference)"); 10 query_should_be_known("(prefers-reduced-motion: reduce)"); 11 12 query_should_be_unknown("(prefers-reduced-motion: 0)"); 13 query_should_be_unknown("(prefers-reduced-motion: none)"); 14 query_should_be_unknown("(prefers-reduced-motion: 10px)"); 15 query_should_be_unknown("(prefers-reduced-motion: no-preference reduce)"); 16 query_should_be_unknown("(prefers-reduced-motion: reduced)"); 17 query_should_be_unknown("(prefers-reduced-motion: no-preference/reduce)"); 18 19 test(() => { 20 // What this is saying is that 'no-preference' is not the default, so 21 // irregardless of the current OS settings, (prefers-reduced-motion).matches 22 // should not be equivalent to (prefers-reduced-motion: no-preference).matches. 23 let booleanContext = window.matchMedia("(prefers-reduced-motion)"); 24 let noPreference = window.matchMedia("(prefers-reduced-motion: no-preference)"); 25 assert_equals(booleanContext.matches, !noPreference.matches); 26 }, "Check that no-preference evaluates to false in the boolean context"); 27 </script>