has-in-ancestor-position.html

<!DOCTYPE html>

<meta charset="utf-8">

<title>CSS Selector Invalidation: :has() in ancestor position</title>

<link rel="author" title="Antti Koivisto" href="mailto:antti@apple.com">

<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 }

div:has(.test) #subject { color: red }

div:has([test_attr]) #subject { color: orangered }

div:has(> .test) #subject { color: green }

div:has(> [test_attr]) #subject { color: lightgreen }

div:has(~ .test) #subject { color: yellow }

div:has(~ [test_attr]) #subject { color: ivory }

div:has(+ .test) #subject { color: blue }

div:has(+ [test_attr]) #subject { color: skyblue }

div:has(~ div .test) #subject { color: purple }

div:has(~ div [test_attr]) #subject { color: violet }

div:has(+ div .test) #subject { color: pink }

div:has(+ div [test_attr]) #subject { color: lightpink }

</style>

<main id=main>

    <div id=subject_ancestor>

        <div id=subject_parent>

            <div id=subject>

                <div id=subject_child>

                    <div id=subject_descendant></div>

                </div>

            </div>

        </div>

    </div>

    <div id=next_sibling>

        <div id=next_sibling_child>

            <div id=next_sibling_descendant></div>

        </div>

    </div>

</main>

<script>

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

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

const orangered = 'rgb(255, 69, 0)';

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

const lightgreen = 'rgb(144, 238, 144)';

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

const skyblue = 'rgb(135, 206, 235)';

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

const ivory = 'rgb(255, 255, 240)';

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

const violet = 'rgb(238, 130, 238)';

const pink = 'rgb(255, 192, 203)';

const lightpink = 'rgb(255, 182, 193)';

const colors = {

  grey: {

    classTest: grey,

    attributeTest: grey,

},

  red: {

    classTest: red,

    attributeTest: orangered,

},

  green: {

    classTest: green,

    attributeTest: lightgreen,

},

  blue: {

    classTest: blue,

    attributeTest: skyblue,

},

  yellow: {

    classTest: yellow,

    attributeTest: ivory,

},

  purple: {

    classTest: purple,

    attributeTest: violet,

},

  pink: {

    classTest: pink,

    attributeTest: lightpink,

},

};

function testColor(test_name, color) {

    test(function() {

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

    }, test_name);

function testClassChange(element, expectedColorName)

    const expectedColorForClassTest = colors[expectedColorName].classTest;

    element.classList.add('test');

    testColor(`add .test to ${element.id}`, expectedColorForClassTest);

    element.classList.remove('test');

    testColor(`remove .test from ${element.id}`, grey);

function testElementInsertionBefore(beforeElement, expectedColorName)

    const expectedColorForClassTest = colors[expectedColorName].classTest;

    const expectedColorForAttributeTest = colors[expectedColorName].attributeTest;

    const newElement = document.createElement('div');

    newElement.classList.add('test')

    beforeElement.before(newElement);

    testColor(`insert element div.test before ${beforeElement.id}`, expectedColorForClassTest);

    newElement.classList.remove('test');

    testColor(`remove the class 'test' from the element inserted before ${beforeElement.id}`, grey);

    newElement.classList.add('test');

    testColor(`add the class 'test' again to the element inserted before ${beforeElement.id}`, expectedColorForClassTest);

    newElement.remove();

    testColor(`remove element div.test before ${beforeElement.id}`, grey);

    newElement.classList.remove('test');

    beforeElement.before(newElement);

    testColor(`insert element div before ${beforeElement.id}`, grey);

    newElement.classList.add('test');

    testColor(`add the class 'test' to the element inserted again before ${beforeElement.id}`, expectedColorForClassTest);

    newElement.classList.remove('test');

    testColor(`remove the class 'test' from the element inserted again before ${beforeElement.id}`, grey);

    newElement.remove();

    testColor(`remove element div before ${beforeElement.id}`, grey);

    newElement.setAttribute('test_attr', '');

    beforeElement.before(newElement);

    testColor(`insert element div[test_attr] before ${beforeElement.id}`, expectedColorForAttributeTest);

    newElement.remove();

    testColor(`remove element div[test_attr] before ${beforeElement.id}`, grey);

function testElementInsertionAfter(afterElement, expectedColorName)

    const expectedColorForClassTest = colors[expectedColorName].classTest;

    const expectedColorForAttributeTest = colors[expectedColorName].attributeTest;

    const newElement = document.createElement('div');

    newElement.classList.add('test')

    afterElement.after(newElement);

    testColor(`insert element div.test after ${afterElement.id}`, expectedColorForClassTest);

    newElement.classList.remove('test');

    testColor(`remove the class 'test' from the element inserted after ${afterElement.id}`, grey);

    newElement.classList.add('test');

    testColor(`add the class 'test' again to the element inserted after ${afterElement.id}`, expectedColorForClassTest);

    newElement.remove();

    testColor(`remove element div.test after ${afterElement.id}`, grey);

    newElement.classList.remove('test');

    afterElement.after(newElement);

    testColor(`insert element div after ${afterElement.id}`, grey);

    newElement.classList.add('test');

    testColor(`add the class 'test' to the element inserted again after ${afterElement.id}`, expectedColorForClassTest);

    newElement.classList.remove('test');

    testColor(`remove the class 'test' from the element inserted again after ${afterElement.id}`, grey);

    newElement.remove();

    testColor(`remove element div after ${afterElement.id}`, grey);

    newElement.setAttribute('test_attr', '');

    afterElement.after(newElement);

    testColor(`insert element div[test_attr] after ${afterElement.id}`, expectedColorForAttributeTest);

    newElement.remove();

    testColor(`remove element div[test_attr] after ${afterElement.id}`, grey);

function testTreeInsertionBefore(beforeElement, expectedColorName)

    const expectedColorForClassTest = colors[expectedColorName].classTest;

    const expectedColorForAttributeTest = colors[expectedColorName].attributeTest;

    const newElement = document.createElement('div');

    const newChild = document.createElement('div');

    newChild.classList.add('test');

    newElement.appendChild(newChild);

    beforeElement.before(newElement);

    testColor(`insert tree div>div.test before ${beforeElement.id}`, expectedColorForClassTest);

    newChild.classList.remove('test');

    testColor(`remove the class 'test' from the element in the tree inserted before ${beforeElement.id}`, grey);

    newChild.classList.add('test');

    testColor(`add the class 'test' again to the element in the tree inserted before ${beforeElement.id}`, expectedColorForClassTest);

    newElement.remove();

    testColor(`remove tree div>div.test before ${beforeElement.id}`, grey);

    newChild.classList.remove('test');

    beforeElement.before(newElement);

    testColor(`insert tree div>div before ${beforeElement.id}`, grey);

    newChild.classList.add('test');

    testColor(`add the class 'test' to the element in the tree inserted again before ${beforeElement.id}`, expectedColorForClassTest);

    newChild.classList.remove('test');

    testColor(`remove the class 'test' from the element in the tree inserted again before ${beforeElement.id}`, grey);

    newElement.remove();

    testColor(`remove tree div>div before ${beforeElement.id}`, grey);

    newChild.setAttribute('test_attr', '');

    beforeElement.before(newElement);

    testColor(`insert element div>div[test_attr] before ${beforeElement.id}`, expectedColorForAttributeTest);

    newElement.remove();

    testColor(`remove element div>div[test_attr] before ${beforeElement.id}`, grey);

function testTreeInsertionAfter(afterElement, expectedColorName)

    const expectedColorForClassTest = colors[expectedColorName].classTest;

    const expectedColorForAttributeTest = colors[expectedColorName].attributeTest;

    const newElement = document.createElement('div');

    const newChild = document.createElement('div');

    newChild.classList.add('test');

    newElement.appendChild(newChild);

    afterElement.after(newElement);

    testColor(`insert tree div>div.test after ${afterElement.id}`, expectedColorForClassTest);

    newChild.classList.remove('test');

    testColor(`remove the class 'test' from the element in the tree inserted after ${afterElement.id}`, grey);

    newChild.classList.add('test');

    testColor(`add the class 'test' again to the element in the tree inserted after ${afterElement.id}`, expectedColorForClassTest);

    newElement.remove();

    testColor(`remove tree div>div.test after ${afterElement.id}`, grey);

    newChild.classList.remove('test');

    afterElement.after(newElement);

    testColor(`insert tree div>div after ${afterElement.id}`, grey);

    newChild.classList.add('test');

    testColor(`add the class 'test' to the element in the tree inserted again after ${afterElement.id}`, expectedColorForClassTest);

    newChild.classList.remove('test');

    testColor(`remove the class 'test' from the element in the tree inserted again after ${afterElement.id}`, grey);

    newElement.remove();

    testColor(`remove tree div>div after ${afterElement.id}`, grey);

    newChild.setAttribute('test_attr', '');

    afterElement.after(newElement);

    testColor(`insert element div>div[test_attr] after ${afterElement.id}`, expectedColorForAttributeTest);

    newElement.remove();

    testColor(`remove element div>div[test_attr] after ${afterElement.id}`, grey);

testColor('Initial color', grey);

testClassChange(subject_ancestor, "grey");

testClassChange(subject_parent, "green");

testClassChange(subject, "green");

testClassChange(subject_child, "red");

testClassChange(subject_descendant, "red");

testClassChange(next_sibling, "blue");

testClassChange(next_sibling_child, "pink");

testClassChange(next_sibling_descendant, "pink");

testElementInsertionBefore(subject_ancestor, "grey");

testElementInsertionBefore(subject_parent, "green");

testElementInsertionBefore(subject, "green");

testElementInsertionBefore(subject_child, "red");

testElementInsertionBefore(subject_descendant, "red");

testElementInsertionBefore(next_sibling, "blue");

testElementInsertionBefore(next_sibling_child, "pink");

testElementInsertionBefore(next_sibling_descendant, "pink");

testElementInsertionAfter(subject_ancestor, "blue");

testElementInsertionAfter(subject_parent, "blue");

testElementInsertionAfter(subject, "green");

testElementInsertionAfter(subject_child, "red");

testElementInsertionAfter(subject_descendant, "red");

testElementInsertionAfter(next_sibling, "yellow");

testElementInsertionAfter(next_sibling_child, "pink");

testElementInsertionAfter(next_sibling_descendant, "pink");

testTreeInsertionBefore(subject_ancestor, "grey");

testTreeInsertionBefore(subject_parent, "red");

testTreeInsertionBefore(subject, "red");

testTreeInsertionBefore(subject_child, "red");

testTreeInsertionBefore(subject_descendant, "red");

testTreeInsertionBefore(next_sibling, "pink");

testTreeInsertionBefore(next_sibling_child, "pink");

testTreeInsertionBefore(next_sibling_descendant, "pink");

testTreeInsertionAfter(subject_ancestor, "pink");

testTreeInsertionAfter(subject_parent, "pink");

testTreeInsertionAfter(subject, "red");

testTreeInsertionAfter(subject_child, "red");

testTreeInsertionAfter(subject_descendant, "red");

testTreeInsertionAfter(next_sibling, "purple");

testTreeInsertionAfter(next_sibling_child, "pink");

testTreeInsertionAfter(next_sibling_descendant, "pink");

</script>

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