has-side-effect.html

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This WPT test may be referenced by the following Test IDs:
- /css/selectors/invalidation/has-side-effect.html - WPT Dashboard Interop Dashboard

<!DOCTYPE html>

<meta charset="utf-8">

<title>CSS Selector Invalidation: Invalidate :has() as result of insertion/removal</title>

<link rel="author" title="David Shin" href="mailto:dshin@mozilla.com">

<link rel="author" title="Emilio Cobos Álvarez" href="mailto:emilio@crisal.io">

<script src="/resources/testharness.js"></script>

<script src="/resources/testharnessreport.js"></script>

<link rel="help" href="https://drafts.csswg.org/selectors/#relational">

<style>

div, main { color: grey }

#subject:has(+ #next_sibling) { color: red; }

#prev_sibling:has(+ #subject + #next_sibling) { color: green; }

</style>

<main id=main>

  <div id=prev_sibling></div>

  <div id=subject></div>

  <div id=blocks_match></div>

  <div id=next_sibling></div>

</main>

<script>

const grey = 'rgb(128, 128, 128)';

const red = 'rgb(255, 0, 0)';

const green = 'rgb(0, 128, 0)';

function testColors(test_name, subject_color, prev_sibling_color) {

    test(function() {

        assert_equals(getComputedStyle(subject).color, subject_color);

        assert_equals(getComputedStyle(prev_sibling).color, prev_sibling_color);

    }, test_name);

testColors('Initial colors', grey, grey);

const d = blocks_match;

d.remove();

testColors('Matches after #blocks_match removed', red, green);

subject.after(d);

testColors('Does not match after #blocks_match added', grey, grey);

</script>