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<!DOCTYPE html>
<html>
<head>
<link rel="help" href="http://www.whatwg.org/specs/web-apps/current-work/multipage/interactive-elements.html#attr-details-open">
<script src="../../resources/js-test.js"></script>
</head>
<body>
<details id="details" ontoggle="handleToggleEventFromHTMLAttribute(event)">
<summary>details</summary>
<input>
</details>
<script>
description("Tests that a 'toggle' event is fired asynchronously whenever the open attribute is added to or removed from a details element.");
window.jsTestIsAsync = true;
var toggleEventCount = 0;
var toggleEventCountFromHTMLAttribute = 0;
var testEvent;
function handleToggleEventFromHTMLAttribute(ev) {
testEvent = ev;
shouldBe("testEvent.__proto__", "Event.prototype");
shouldBeEqualToString("testEvent.type", "toggle");
++toggleEventCountFromHTMLAttribute;
}
function handleToggleEvent(ev) {
testEvent = ev;
shouldBe("testEvent.__proto__", "Event.prototype");
shouldBeEqualToString("testEvent.type", "toggle");
++toggleEventCount;
}
function checkSingleToggleEvent() {
shouldBe("toggleEventCount", "1");
shouldBe("toggleEventCountFromHTMLAttribute", "1");
shouldBeTrue("details.open");
testEventsCoalesced();
}
function testToogleEventFired() {
shouldBe("toggleEventCount", "0");
shouldBe("toggleEventCountFromHTMLAttribute", "0");
details.open = true;
shouldBe("toggleEventCount", "0");
shouldBe("toggleEventCountFromHTMLAttribute", "0");
setTimeout(checkSingleToggleEvent, 0);
}
function checkEventsCoalesced() {
shouldBe("toggleEventCount", "2");
shouldBe("toggleEventCountFromHTMLAttribute", "2");
shouldBeFalse("details.open");
finishJSTest();
}
function testEventsCoalesced() {
// When the open attribute is toggled several times in succession,
// these steps essentially get coalesced so that only one event is
// fired.
details.open = false;
details.open = true;
details.open = false;
setTimeout(checkEventsCoalesced, 0);
}
var details = document.getElementById("details");
shouldBe("details.ontoggle.__proto__", "Function.prototype");
details.addEventListener("toggle", handleToggleEvent);
shouldBeFalse("details.open");
testToogleEventFired();
</script>
</body>
</html>
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