at-container-parsing.html

<!doctype html>

<title>@container: parsing</title>

<link rel="help" href="https://drafts.csswg.org/css-contain-3/#container-rule">

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

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

<script src="support/cq-testcommon.js"></script>

<div style="container-name:name;container-type:size; width:100px; height:100px">

  <main id=main></main>

</div>

<script>

  setup(() => assert_implements_container_queries());

  function cleanup_main() {

    while (main.firstChild)

      main.firstChild.remove();

  function set_style(text) {

    let style = document.createElement('style');

    style.innerText = text;

    main.append(style);

    return style;

  function test_rule_valid(query) {

    test(t => {

      t.add_cleanup(cleanup_main);

      let style = set_style(`@container ${query} {}`);

      assert_equals(style.sheet.rules.length, 1);

    }, query);

  function test_condition_invalid(condition) {

    test(t => {

      t.add_cleanup(cleanup_main);

      let style = set_style(`@container name ${condition} {}`);

      assert_equals(style.sheet.rules.length, 0);

    }, condition);

  // Tests that 1) the condition parses, and 2) is either "unknown" or not, as

  // specified.

  function test_condition_valid(condition, unknown) {

    test(t => {

      t.add_cleanup(cleanup_main);

      let style = set_style(`

        @container name ${condition} {}

        @container name (${condition}) or (not (${condition})) { main { --match:true; } }

`);

      assert_equals(style.sheet.rules.length, 2);

      const expected = unknown ? '' : 'true';

      assert_equals(getComputedStyle(main).getPropertyValue('--match'), expected);

    }, condition);

  function test_condition_known(condition) {

    test_condition_valid(condition, false /* unknown */);

  function test_condition_unknown(condition) {

    test_condition_valid(condition, true /* unknown */);

  function test_container_name_invalid(container_name) {

    test(t => {

      t.add_cleanup(cleanup_main);

      let style = set_style(`@container ${container_name} not (width) {}`);

      assert_equals(style.sheet.rules.length, 0);

    }, `Container name: ${container_name}`);

  function test_container_name_valid(container_name) {

    test(t => {

      t.add_cleanup(cleanup_main);

      let style = set_style(`@container ${container_name} not (width) {}`);

      assert_equals(style.sheet.rules.length, 1);

    }, `Container name: ${container_name}`);

  test_condition_known('(width)');

  test_condition_known('(min-width: 0px)');

  test_condition_known('(max-width: 0px)');

  test_condition_known('(height)');

  test_condition_known('(min-height: 0px)');

  test_condition_known('(max-height: 0px)');

  test_condition_known('(aspect-ratio)');

  test_condition_known('(min-aspect-ratio: 1/2)');

  test_condition_known('(max-aspect-ratio: 1/2)');

  test_condition_known('(orientation: portrait)');

  test_condition_known('(inline-size)');

  test_condition_known('(min-inline-size: 0px)');

  test_condition_known('(max-inline-size: 0px)');

  test_condition_known('(block-size)');

  test_condition_known('(min-block-size: 0px)');

  test_condition_known('(max-block-size: 0px)');

  test_condition_known('(width: 100px)');

  test_condition_known('((width: 100px))');

  test_condition_known('(not (width: 100px))');

  test_condition_known('((width: 100px) and (height: 100px))');

  test_condition_known('(((width: 40px) or (width: 50px)) and (height: 100px))');

  test_condition_known('((width: 100px) and ((height: 40px) or (height: 50px)))');

  test_condition_known('(((width: 40px) and (height: 50px)) or (height: 100px))');

  test_condition_known('((width: 50px) or ((width: 40px) and (height: 50px)))');

  test_condition_known('((width: 100px) and (not (height: 100px)))');

  test_condition_known('(width < 100px)');

  test_condition_known('(width <= 100px)');

  test_condition_known('(width = 100px)');

  test_condition_known('(width > 100px)');

  test_condition_known('(width >= 100px)');

  test_condition_known('(100px < width)');

  test_condition_known('(100px <= width)');

  test_condition_known('(100px = width)');

  test_condition_known('(100px > width)');

  test_condition_known('(100px >= width)');

  test_condition_known('(100px < width < 200px)');

  test_condition_known('(100px < width <= 200px)');

  test_condition_known('(100px <= width < 200px)');

  test_condition_known('(100px > width > 200px)');

  test_condition_known('(100px > width >= 200px)');

  test_condition_known('(100px >= width > 200px)');

  test_condition_known('(width: calc(10px))');

  test_condition_known('(width: calc(10em))');

  test_condition_known('(width: calc(10px + 10em))');

  test_condition_known('(width < calc(10px + 10em))');

  test_condition_known('(width < max(10px, 10em))');

  test_condition_known('(calc(10px + 10em) < width)');

  test_condition_known('(calc(10px + 10em) < width < max(30px, 30em))');

  test_condition_known('(width: 100px) and (height: 100px)');

  test_condition_known('(width: 100px) or (height: 100px)');

  test_condition_known('not (width: 100px)');

  test_condition_unknown('foo(width)');

  test_condition_unknown('size(width)');

  test_condition_unknown('(asdf)');

  test_condition_unknown('(resolution > 100dpi)');

  test_condition_unknown('(resolution: 150dpi)');

  test_condition_unknown('(resolution: calc(2x))');

  test_condition_unknown('(color)');

  test_condition_unknown('(min-color: 1)');

  test_condition_unknown('(color-index >= 1)');

  test_condition_unknown('size(grid)');

  test_condition_unknown('(grid)');

  test_condition_unknown('(width == 100px)');

  test_condition_unknown('(100px == width)');

  test_condition_unknown('(100px = width = 200px)');

  test_condition_unknown('(100px < width > 200px)');

  test_condition_unknown('(100px <= width >= 200px)');

  test_condition_unknown('(100px <= width > 200px)');

  test_condition_unknown('(100px < width >= 200px)');

  test_condition_unknown('(100px : width : 200px)');

  test_condition_invalid('screen');

  test_condition_invalid('print');

  test_condition_invalid('not print');

  test_condition_invalid('only print');

  test_condition_invalid('screen and (width: 100px)');

  test_condition_invalid('screen or (width: 100px)');

  test_condition_invalid('not screen and (width: 100px)');

  test_condition_invalid('not screen or (width: 100px)');

  test_condition_invalid('(width: 100px), (height: 100px)');

  test_condition_invalid('foo (width: 100px)');

  test_rule_valid('name not (width <= 500px)');

  test_rule_valid('not (width <= 500px)');

  test_container_name_valid('foo');

  test_container_name_valid(' foo');

  test_container_name_valid(' foo ');

  test_container_name_valid('normal');

  test_container_name_valid('Normal');

  test_container_name_valid('auto');

  test_container_name_valid('Auto');

  test_container_name_invalid('foo foo');

  test_container_name_invalid('1px');

  test_container_name_invalid('50gil');

  test_container_name_invalid('name(foo)');

  test_container_name_invalid('type(inline-size)');

  test_container_name_invalid('"foo"');

  test_container_name_invalid('"inherit"');

  test_container_name_invalid('inherit');

  test_container_name_invalid('INITIAL');

  test_container_name_invalid('Unset');

  test_container_name_invalid('deFAULT');

  test_container_name_invalid('none');

  test_container_name_invalid('None');

  test_container_name_invalid('and');

  test_container_name_invalid('or');

  test_container_name_invalid('not');

  test_container_name_invalid('And');

  test_container_name_invalid('oR');

  test_container_name_invalid('nOt');

</script>