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<!DOCTYPE html>
<title>CSS Selectors Invalidation: :is and :where selectors containing "hard" selectors</title>
<link rel="author" title="David Shin" href="dshin@mozilla.com">
<link rel="help" href="https://drafts.csswg.org/selectors/#logical-combination">
<link rel="help" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1874042">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<style>
.container {
color: grey;
}
#subject1:is(.other-match, :has(.descendant)) {
color: red;
}
#subject1:is(.parent > .other-match, .parent > :has(.descendant)) {
color: orangered;
}
#subject2:where(.other-match, :has(.descendant)) {
color: darkred;
}
#subject2:where(.parent > .other-match, .parent > :has(.descendant)) {
color: pink;
}
#subject3:is(.other-match, :nth-child(1000 of .another-match)) {
color: green;
}
#subject3:is(.parent > .other-match, .parent > :nth-child(1000 of .another-match)) {
color: lightgreen;
}
#subject4:where(.other-match, :nth-child(1000 of .another-match)) {
color: darkgreen;
}
#subject4:where(.parent > .other-match, .parent > :nth-child(1000 of .another-match)) {
color: yellowgreen;
}
</style>
<div id="par">
<div id="subject1" class="container"></div>
<div id="subject2" class="container"></div>
<div id="subject3" class="container another-match"></div>
<div id="subject4" class="container another-match"></div>
</div>
<script>
const colors = {
grey: "rgb(128, 128, 128)",
red: "rgb(255, 0, 0)",
orangered: "rgb(255, 69, 0)",
darkred: "rgb(139, 0, 0)",
pink: "rgb(255, 192, 203)",
green: "rgb(0, 128, 0)",
lightgreen: "rgb(144, 238, 144)",
darkgreen: "rgb(0, 100, 0)",
yellowgreen: "rgb(154, 205, 50)"
};
function testClassChange(subject, before, after, afterParent) {
const cls = "other-match";
const parentCls = "parent";
const beforeColor = colors[before];
test(() => {
assert_equals(getComputedStyle(subject).color, beforeColor);
}, subject.id + " initial color is " + before);
subject.classList.add(cls);
const afterColor = colors[after];
test(() => {
assert_equals(getComputedStyle(subject).color, afterColor);
}, subject.id + " is " + after + " when ." + cls + " added");
par.classList.add(parentCls);
const afterParentColor = colors[afterParent];
test(() => {
assert_equals(getComputedStyle(subject).color, afterParentColor);
}, subject.id + " is " + afterParent + " when ." + parentCls + " added to parent");
par.classList.remove(parentCls);
test(() => {
assert_equals(getComputedStyle(subject).color, afterColor);
}, subject.id + " is " + afterParent + " when ." + parentCls + " removed from parent");
subject.classList.remove(cls);
test(() => {
assert_equals(getComputedStyle(subject).color, beforeColor);
}, subject.id + " is " + after + " when ." + cls + " removed");
}
testClassChange(subject1, "grey", "red", "orangered");
testClassChange(subject2, "grey", "darkred", "pink");
testClassChange(subject3, "grey", "green", "lightgreen");
testClassChange(subject4, "grey", "darkgreen", "yellowgreen");
</script>
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