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Test Info:
- This WPT test may be referenced by the following Test IDs:
- /css/css-scoping/slotted-nested.html - WPT Dashboard Interop Dashboard
<!doctype html>
<link rel="author" href="mailto:emilio@crisal.io" title="Emilio Cobos Álvarez">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<div id="host"><p>This text should be green</p></div>
<script>
let shadow = host.attachShadow({ mode: "open" });
shadow.innerHTML = `
<style>
/* This is not expected to match */
.container ::slotted(p) {
color: red !important;
}
/* This _is_ expected to match */
#nested ::slotted(p) {
background-color: green;
}
</style>
<div id="nested"><slot></slot></div>
`;
let nested = shadow.querySelector("#nested").attachShadow({ mode: "open" });
nested.innerHTML = `
<style>
.container ::slotted(p) {
color: green;
}
</style>
<div class="container">
<slot></slot>
</div>
`;
let p = document.querySelector("p");
test(function() {
assert_equals(getComputedStyle(p).color, "rgb(0, 128, 0)");
assert_equals(getComputedStyle(p).backgroundColor, "rgb(0, 128, 0)");
}, "Slotted matches rules against the slot in the right tree");
test(function() {
nested.querySelector(".container").classList.remove("container");
assert_not_equals(getComputedStyle(p).color, "rgb(0, 128, 0)");
nested.host.removeAttribute("id");
assert_not_equals(getComputedStyle(p).backgroundColor, "rgb(0, 128, 0)");
}, "Style invalidation works correctly for nested slots");
</script>