28 lines
750 B
HTML
28 lines
750 B
HTML
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<!DOCTYPE html>
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<html>
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<body>
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<script src="../../resources/js-test-pre.js"></script>
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<script>
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description("Tests support for 'once' member in AddEventListenerOptions.");
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var listenerCallCount = 0;
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function listenerFunction()
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{
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++listenerCallCount;
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if (listenerCallCount == 1)
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document.body.dispatchEvent(new Event('test'));
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}
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evalAndLog("document.body.addEventListener('test', listenerFunction, { 'once': true })");
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shouldBe("listenerCallCount", "0");
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evalAndLog("document.body.dispatchEvent(new Event('test'))");
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shouldBe("listenerCallCount", "1");
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evalAndLog("document.body.dispatchEvent(new Event('test'))");
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shouldBe("listenerCallCount", "1");
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</script>
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<script src="../../resources/js-test-post.js"></script>
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</body>
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</html>
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