11cb0ef41Sopenharmony_ci<!DOCTYPE HTML> 21cb0ef41Sopenharmony_ci<meta charset=utf-8> 31cb0ef41Sopenharmony_ci<title>User Timing: L2 vs L3 feature detection</title> 41cb0ef41Sopenharmony_ci<script src="/resources/testharness.js"></script> 51cb0ef41Sopenharmony_ci<script src="/resources/testharnessreport.js"></script> 61cb0ef41Sopenharmony_ci<script> 71cb0ef41Sopenharmony_ci test(() => { 81cb0ef41Sopenharmony_ci // Feature detection for PerformanceMark. 91cb0ef41Sopenharmony_ci assert_equals(typeof(PerformanceMark.prototype), "object"); 101cb0ef41Sopenharmony_ci // Test for UserTiming L3. 111cb0ef41Sopenharmony_ci if (PerformanceMark.prototype.hasOwnProperty('detail')) { 121cb0ef41Sopenharmony_ci assert_equals(typeof(performance.mark("mark")), "object", 131cb0ef41Sopenharmony_ci "performance.mark should return an object in UserTiming L3."); 141cb0ef41Sopenharmony_ci } 151cb0ef41Sopenharmony_ci // Test for UserTiming L2. 161cb0ef41Sopenharmony_ci else { 171cb0ef41Sopenharmony_ci assert_equals(typeof(performance.mark("mark")), "undefined", 181cb0ef41Sopenharmony_ci "performance.mark should be void in UserTiming L2."); 191cb0ef41Sopenharmony_ci } 201cb0ef41Sopenharmony_ci }, "Test PerformanceMark existence and feature detection"); 211cb0ef41Sopenharmony_ci 221cb0ef41Sopenharmony_ci test(() => { 231cb0ef41Sopenharmony_ci // Feature detection for PerformanceMeasure. 241cb0ef41Sopenharmony_ci assert_equals(typeof(PerformanceMeasure.prototype), "object"); 251cb0ef41Sopenharmony_ci // Test for UserTiming L3. 261cb0ef41Sopenharmony_ci if (PerformanceMeasure.prototype.hasOwnProperty('detail')) { 271cb0ef41Sopenharmony_ci assert_equals(typeof(performance.measure("measure")), "object", 281cb0ef41Sopenharmony_ci "performance.measure should return an object in UserTiming L3."); 291cb0ef41Sopenharmony_ci } 301cb0ef41Sopenharmony_ci // Test for UserTiming L2. 311cb0ef41Sopenharmony_ci else { 321cb0ef41Sopenharmony_ci assert_equals(typeof(performance.measure("measure")), "undefined", 331cb0ef41Sopenharmony_ci "performance.measure should be void in UserTiming L2."); 341cb0ef41Sopenharmony_ci } 351cb0ef41Sopenharmony_ci }, "Test PerformanceMeasure existence and feature detection"); 361cb0ef41Sopenharmony_ci</script> 37