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<!DOCTYPE html>
<meta charset="utf-8">
<title>HTML Test: focus - the sequential focus navigation order with shadow dom that delegates focus and tabindex in shadow tree varies</title>
<link rel="help" href="https://html.spec.whatwg.org/multipage/interaction.html#sequential-focus-navigation">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/resources/testdriver.js"></script>
<script src="/resources/testdriver-vendor.js"></script>
<script src="resources/shadow-utils.js"></script>
<body>
<script>
// Structure:
// <div #aboveHost tabindex=0>
// <div #host tabindex=0>
// #shadowRoot (delegatesFocus)
// <div #aboveSlot tabindex=0>
// <slot #slotAbove tabindex=1>
// (slotted) <div #slottedAbove tabindex=3>
// <slot #slotBelow tabindex=2>
// (slotted) <div #slottedBelow tabindex=1>
// <div #belowSlot tabindex=-1>
// <div #belowHost tabindex=0>
promise_test(() => {
let elementsInFlatTreeOrder;
let [aboveHost, host, aboveSlot, slotAbove, slottedAbove, slotBelow, slottedBelow, belowSlot, belowHost] = elementsInFlatTreeOrder = prepareDOM(document.body, true);
setTabIndex(elementsInFlatTreeOrder, -1);
setTabIndex([aboveHost, host, aboveSlot, belowHost], 0);
setTabIndex([slotAbove, slottedBelow], 1);
setTabIndex([slotBelow], 2);
setTabIndex([slottedAbove], 3);
resetFocus();
return assertFocusOrder([aboveHost, slottedAbove, slottedBelow, aboveSlot, belowHost]);
}, "Order when tabindex varies and delegatesFocus = true");
</script>
</body>
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