36 lines
1.4 KiB
HTML
36 lines
1.4 KiB
HTML
<!DOCTYPE HTML>
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<meta charset=utf-8>
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<title>User Timing: L2 vs L3 feature detection</title>
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<script src="/resources/testharness.js"></script>
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<script src="/resources/testharnessreport.js"></script>
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<script>
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test(() => {
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// Feature detection for PerformanceMark.
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assert_equals(typeof(PerformanceMark.prototype), "object");
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// Test for UserTiming L3.
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if (PerformanceMark.prototype.hasOwnProperty('detail')) {
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assert_equals(typeof(performance.mark("mark")), "object",
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"performance.mark should return an object in UserTiming L3.");
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}
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// Test for UserTiming L2.
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else {
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assert_equals(typeof(performance.mark("mark")), "undefined",
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"performance.mark should be void in UserTiming L2.");
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}
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}, "Test PerformanceMark existence and feature detection");
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test(() => {
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// Feature detection for PerformanceMeasure.
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assert_equals(typeof(PerformanceMeasure.prototype), "object");
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// Test for UserTiming L3.
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if (PerformanceMeasure.prototype.hasOwnProperty('detail')) {
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assert_equals(typeof(performance.measure("measure")), "object",
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"performance.measure should return an object in UserTiming L3.");
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}
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// Test for UserTiming L2.
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else {
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assert_equals(typeof(performance.measure("measure")), "undefined",
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"performance.measure should be void in UserTiming L2.");
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}
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}, "Test PerformanceMeasure existence and feature detection");
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</script>
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