third_party/web_platform_tests/DOMEvents/event-phases-order.html

<!DOCTYPE html>
<!-- Submitted from TestTWF Paris -->
<title>Event phases order</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<div id="log"></div>
<script>
async_test(function() {
    document.addEventListener('DOMContentLoaded', this.step_func_done(function() {
        var parent = document.getElementById('parent');
        var child = document.getElementById('child');

        var order = [];

        parent.addEventListener('click', this.step_func(function(){ order.push(1) }), true);
        child.addEventListener('click', this.step_func(function(){ order.push(2) }), false);
        parent.addEventListener('click', this.step_func(function(){ order.push(3) }), false);

        child.click();

        assert_array_equals(order, [1, 2, 3]);
    }));
}, "Event phases order");
</script>

    <div id="parent">
        <div id="child"></div>
    </div>