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<!DOCTYPE html>
<html>
<head>
<title>CSS Selectors Invalidation: sibling</title>
<link rel="help" href="https://drafts.csswg.org/selectors-4/#adjacent-sibling-combinators">
<link rel="help" href="https://drafts.csswg.org/selectors-4/#general-sibling-combinators">
<meta name="assert" content="This tests that the + next-sibling selector is effective">
<meta name="assert" content="This tests that the ~ subsequent-sibling selector is effective">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<style>
* { background-color: inherit; }
body { background-color: rgba(0, 0, 0, 0); }
.t1 .sibling + *,
.t2 .sibling ~ *,
.t3 + .sibling + *,
.t4 + .sibling,
.t5 + *,
.t6 ~ .sibling,
.t7 + * + * .child { background-color: rgb(0, 128, 0); }
</style>
</head>
<body>
<div>
<div id="t1">
<div class="sibling"></div>
<div id="r1"></div>
<div id="u1"></div>
</div>
</div>
<div>
<div id="t2">
<div class="sibling"></div>
<div></div>
<div id="r2"></div>
</div>
</div>
<div>
<div id="t3"></div>
<div class="sibling"></div>
<div id="r3"></div>
</div>
<div>
<div id="t4"></div>
<div id="r4" class="sibling"></div>
<div id="u4" class="sibling"></div>
</div>
<div>
<div id="t5"></div>
<div id="r5"></div>
<div id="u5"></div>
</div>
<div>
<div id="t6"></div>
<div></div>
<div id="r6" class="sibling">
<div id="r6b"></div>
</div>
<div id="u6"></div>
</div>
<div>
<div id="t7">
<div class="child"></div>
</div>
<div></div>
<div>
<div id="r7" class="child"></div>
</div>
<div>
<div id="u7" class="child"></div>
</div>
</div>
<script>
test(function() {
assert_equals(getComputedStyle(r1).backgroundColor, "rgba(0, 0, 0, 0)", "Background color should initially be transparent");
t1.className = "t1";
assert_equals(getComputedStyle(r1).backgroundColor, "rgb(0, 128, 0)", "Background color is green after class change");
assert_equals(getComputedStyle(u1).backgroundColor, "rgba(0, 0, 0, 0)", "Background color remains transparent");
}, "Adjacent with universal selector");
test(function() {
assert_equals(getComputedStyle(r2).backgroundColor, "rgba(0, 0, 0, 0)", "Background color should initially be transparent");
t2.className = "t2";
assert_equals(getComputedStyle(r2).backgroundColor, "rgb(0, 128, 0)", "Background color is green after class change");
}, "Indirect adjacent with universal selector");
test(function() {
assert_equals(getComputedStyle(r3).backgroundColor, "rgba(0, 0, 0, 0)", "Background color should initially be transparent");
t3.className = "t3";
assert_equals(getComputedStyle(r3).backgroundColor, "rgb(0, 128, 0)", "Background color is green after class change");
}, "Indirect adjacent with two adjacent selectors");
test(function() {
assert_equals(getComputedStyle(r4).backgroundColor, "rgba(0, 0, 0, 0)", "Background color should initially be transparent");
t4.className = "t4";
assert_equals(getComputedStyle(r4).backgroundColor, "rgb(0, 128, 0)", "Background color is green after class change");
assert_equals(getComputedStyle(u4).backgroundColor, "rgba(0, 0, 0, 0)", "Background color remains transparent");
}, "Adjacent class");
test(function() {
assert_equals(getComputedStyle(r5).backgroundColor, "rgba(0, 0, 0, 0)", "Background color should initially be transparent");
t5.className = "t5";
assert_equals(getComputedStyle(r5).backgroundColor, "rgb(0, 128, 0)", "Background color is green after class change");
assert_equals(getComputedStyle(u5).backgroundColor, "rgba(0, 0, 0, 0)", "Background color remains transparent");
}, "Adjacent universal");
test(function() {
assert_equals(getComputedStyle(r6).backgroundColor, "rgba(0, 0, 0, 0)", "Background color should initially be transparent");
assert_equals(getComputedStyle(r6b).backgroundColor, "rgba(0, 0, 0, 0)", "Child's background color should initially be transparent");
t6.className = "t6";
assert_equals(getComputedStyle(r6).backgroundColor, "rgb(0, 128, 0)", "Background color is green after class change");
assert_equals(getComputedStyle(r6b).backgroundColor, "rgb(0, 128, 0)", "Child's background color is green after class change");
assert_equals(getComputedStyle(u6).backgroundColor, "rgba(0, 0, 0, 0)", "Background color remains transparent");
}, "Sibling subtree through an indirect adjacent combinator");
test(function() {
assert_equals(getComputedStyle(r7).backgroundColor, "rgba(0, 0, 0, 0)", "Background color should initially be transparent");
t7.className = "t7";
assert_equals(getComputedStyle(r7).backgroundColor, "rgb(0, 128, 0)", "Background color is green after class change");
assert_equals(getComputedStyle(u7).backgroundColor, "rgba(0, 0, 0, 0)", "Background color remains transparent");
}, "Sibling descendant through a universal selector");
</script>
</body>
</html>
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