hover-002-manual.html
<!DOCTYPE html>
<meta charset="utf-8">
<title>Selectors: Change class to enable :hover</title>
<link rel="author" title="Rune Lillesveen" href="futhark@chromium.org">
<link rel="help" href="https://drafts.csswg.org/selectors/#the-hover-pseudo">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<style>
.affected:hover { color: green }
#hoveredContents { display: contents }
</style>
<div id="hovered">Hover me - should become green</div>
<div id="hoveredContents">
<div id="hovered2">Hover me - should become green</div>
</div>
<script>
function testElementGreen(test, element) {
element.addEventListener("mouseover", test.step_func(event => {
assert_equals(getComputedStyle(element).color, "rgb(0, 128, 0)");
test.done();
}));
}
// Setting the affected classes here makes the two elements go from never
// reacting to hover to being affected by hover without changing computed
// style.
hovered.offsetTop;
hovered.className = "affected";
hoveredContents.className = "affected";
async_test(t => { testElementGreen(t, hovered); }, "Hover #hovered element should make it go green");
async_test(t => { testElementGreen(t, hovered2); }, "Hover #hoveredContents child should make it go green");
</script>
