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459 lines
12 KiB
HTML
459 lines
12 KiB
HTML
<!DOCTYPE html>
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<meta charset="utf-8">
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<title>CSS Cascade: "all: revert-layer"</title>
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<link rel="author" title="Oriol Brufau" href="mailto:obrufau@igalia.com">
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<link rel="help" href="https://www.w3.org/TR/css-cascade-5/#revert-layer">
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<meta name="assert" content="Checks that adding 'all: revert-layer' on the last layer has no effect.">
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<style>
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/* Set properties to a value different than the initial one. */
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#nothing {
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accent-color: #123;
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align-content: baseline;
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align-items: baseline;
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align-self: baseline;
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align-tracks: baseline;
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alignment-baseline: central;
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alt: "a";
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animation-composition: add;
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animation-delay: 123s;
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animation-delay-start: 123s;
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animation-delay-end: 456s;
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animation-direction: reverse;
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animation-duration: 123s;
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animation-fill-mode: both;
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animation-iteration-count: 123;
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animation-name: \.;
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animation-play-state: paused;
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animation-timeline: none;
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animation-timing-function: linear;
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app-region: drag;
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appearance: auto;
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aspect-ratio: 3 / 4;
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backdrop-filter: invert(1);
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backface-visibility: hidden;
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background-attachment: fixed;
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background-blend-mode: overlay;
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background-clip: content-box;
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background-color: #123;
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background-image: url("#ref");
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background-origin: border-box;
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background-position: 123px;
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background-repeat: round;
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background-size: 123px;
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baseline-shift: 123px;
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block-size: 123px;
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border-block-end: 123px dashed #123;
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border-block-start: 123px dashed #123;
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border-bottom: 123px dashed #123;
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border-collapse: collapse;
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border-end-end-radius: 123px;
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border-end-start-radius: 123px;
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border-image-outset: 123;
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border-image-repeat: round;
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border-image-slice: 123;
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border-image-source: url("#ref");
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border-image-width: 123px;
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border-inline-end: 123px dashed #123;
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border-inline-start: 123px dashed #123;
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border-left: 123px dashed #123;
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border-radius: 123px;
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border-right: 123px dashed #123;
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border-start-end-radius: 123px;
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border-start-start-radius: 123px;
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border-spacing: 123px;
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border-top: 123px dashed #123;
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bottom: 123px;
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box-decoration-break: clone;
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box-shadow: #123 123px 123px 123px 123px;
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box-sizing: border-box;
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break-after: avoid;
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break-before: avoid;
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break-inside: avoid;
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buffered-rendering: static;
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caption-side: bottom;
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caret-color: #123;
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clear: both;
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clip: rect(123px, 123px, 123px, 123px);
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clip-path: url("#ref");
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clip-rule: evenodd;
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color: #123;
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color-interpolation: auto;
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color-interpolation-filters: auto;
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color-rendering: optimizespeed;
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color-scheme: dark;
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column-count: 123;
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column-fill: auto;
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column-gap: 123px;
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column-rule-color: #123;
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column-rule-style: dashed;
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column-rule-width: 123px;
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column-span: all;
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column-width: 123px;
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contain: size;
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contain-intrinsic-block-size: 123px;
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contain-intrinsic-inline-size: 123px;
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contain-intrinsic-size: 123px 123px;
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container-name: foo;
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container-type: size;
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content: "b";
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counter-increment: add 123;
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counter-reset: add 123;
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counter-set: add 123;
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cursor: none;
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cx: 123px;
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cy: 123px;
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d: path("M 1 1");
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direction: rtl;
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display: flow-root;
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dominant-baseline: middle;
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empty-cells: hide;
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fill: #123;
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fill-opacity: 0.123;
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fill-rule: evenodd;
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filter: url("#ref");
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flex-basis: 123px;
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flex-direction: column;
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flex-grow: 123;
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flex-shrink: 123;
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flex-wrap: wrap;
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float: right;
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flood-color: #123;
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flood-opacity: 0.123;
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font-family: "c";
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font-feature-settings: "smcp";
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font-kerning: none;
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font-language-override: "d";
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font-optical-sizing: none;
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font-palette: dark;
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font-size: 123px;
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font-size-adjust: 123;
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font-stretch: 123%;
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font-style: italic;
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font-synthesis: none;
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font-variant-alternates: historical-forms;
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font-variant-caps: small-caps;
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font-variant-east-asian: full-width;
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font-variant-ligatures: none;
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font-variant-numeric: tabular-nums;
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font-variant-position: super;
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font-variation-settings: "smcp" 1;
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font-weight: 123;
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glyph-orientation-horizontal: 123deg;
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glyph-orientation-vertical: 123deg;
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grid-auto-columns: 123px;
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grid-auto-flow: column;
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grid-auto-rows: 123px;
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grid-column-end: 123;
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grid-column-start: 123;
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grid-row-end: 123;
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grid-row-start: 123;
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grid-template-areas: ".";
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grid-template-columns: 123fr;
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grid-template-rows: 123fr;
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hanging-punctuation: first;
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height: 123px;
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hyphenate-character: "e";
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hyphens: auto;
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image-orientation: none;
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image-rendering: pixelated;
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ime-mode: normal;
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initial-letter: 123;
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inline-size: 123px;
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input-security: none;
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inset-block-end: 123px;
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inset-block-start: 123px;
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inset-inline-end: 123px;
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inset-inline-start: 123px;
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isolation: isolate;
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justify-content: center;
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justify-items: baseline;
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justify-self: baseline;
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justify-tracks: center;
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kerning: 123px;
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left: 123px;
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letter-spacing: 123px;
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lighting-color: #123;
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line-break: anywhere;
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line-height: 123px;
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line-height-step: 123px;
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list-style-image: url("#ref");
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list-style-position: inside;
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list-style-type: square;
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margin-block-end: 123px;
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margin-block-start: 123px;
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margin-bottom: 123px;
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margin-inline-end: 123px;
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margin-inline-start: 123px;
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margin-left: 123px;
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margin-right: 123px;
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margin-top: 123px;
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marker-end: url("#ref");
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marker-mid: url("#ref");
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marker-start: url("#ref");
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mask-clip: content-box;
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mask-composite: exclude;
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mask-image: url("#ref");
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mask-mode: alpha;
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mask-origin: content-box;
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mask-position-x: 123px;
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mask-position-y: 123px;
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mask-repeat: round;
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mask-size: 123px;
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mask-type: alpha;
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masonry-auto-flow: ordered;
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math-depth: 123;
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math-shift: compact;
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math-style: compact;
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max-block-size: 123px;
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max-height: 123px;
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max-inline-size: 123px;
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max-width: 123px;
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min-block-size: 123px;
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min-height: 123px;
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min-inline-size: 123px;
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min-width: 123px;
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mix-blend-mode: overlay;
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object-fit: contain;
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object-overflow: visible;
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object-position: 123px 123%;
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object-view-box: inset(123px);
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offset-anchor: 123px 123%;
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offset-distance: 123px;
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offset-path: path("M 1 1");
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offset-position: 123px;
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offset-rotate: 123deg;
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opacity: 0.123;
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order: 123;
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orphans: 123;
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outline-color: #123;
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outline-offset: 123px;
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outline-style: auto;
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outline-width: 123px;
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overflow-anchor: none;
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overflow-block: auto;
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overflow-clip-margin: 123px;
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overflow-inline: hidden;
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overflow-wrap: anywhere;
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overflow-x: auto;
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overflow-y: hidden;
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overscroll-behavior-block: contain;
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overscroll-behavior-inline: contain;
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overscroll-behavior-x: contain;
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overscroll-behavior-y: contain;
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padding-block-end: 123px;
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padding-block-start: 123px;
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padding-bottom: 123px;
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padding-inline-end: 123px;
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padding-inline-start: 123px;
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padding-left: 123px;
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padding-right: 123px;
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padding-top: 123px;
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paint-order: fill;
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perspective: 123px;
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perspective-origin: 123px 123%;
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pointer-events: all;
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position: relative;
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print-color-adjust: exact;
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quotes: none;
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r: 123px;
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resize: both;
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right: 123px;
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rotate: 123deg;
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row-gap: 123px;
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ruby-align: center;
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ruby-position: under;
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rx: 123px;
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ry: 123px;
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scale: 123;
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scroll-behavior: smooth;
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scroll-margin-block-end: 123px;
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scroll-margin-block-start: 123px;
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scroll-margin-bottom: 123px;
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scroll-margin-inline-end: 123px;
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scroll-margin-inline-start: 123px;
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scroll-margin-left: 123px;
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scroll-margin-right: 123px;
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scroll-margin-top: 123px;
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scroll-padding-block-end: 123px;
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scroll-padding-block-start: 123px;
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scroll-padding-bottom: 123px;
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scroll-padding-inline-end: 123px;
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scroll-padding-inline-start: 123px;
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scroll-padding-left: 123px;
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scroll-padding-right: 123px;
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scroll-padding-top: 123px;
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scroll-snap-align: center;
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scroll-snap-stop: always;
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scroll-snap-type: both;
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scrollbar-color: #123 #123;
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scrollbar-gutter: stable;
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scrollbar-width: none;
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shape-image-threshold: 123;
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shape-margin: 123px;
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shape-outside: border-box;
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shape-rendering: optimizespeed;
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speak: spell-out;
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speak-as: spell-out;
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stop-color: #123;
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stop-opacity: 0.123;
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stroke: #123;
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stroke-color: #123;
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stroke-dasharray: 123px;
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stroke-dashoffset: 123px;
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stroke-linecap: round;
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stroke-linejoin: round;
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stroke-miterlimit: 123;
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stroke-opacity: 0.123;
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stroke-width: 123px;
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tab-size: 123;
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table-layout: fixed;
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text-align: center;
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text-align-last: center;
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text-anchor: middle;
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text-combine-upright: all;
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text-decoration-color: #123;
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text-decoration-line: underline;
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text-decoration-skip-ink: none;
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text-decoration-style: dashed;
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text-decoration-thickness: 123px;
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text-emphasis-color: #123;
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text-emphasis-position: under right;
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text-emphasis-style: dot;
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text-indent: 123px;
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text-justify: none;
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text-orientation: sideways;
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text-overflow: ellipsis;
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text-rendering: optimizespeed;
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text-shadow: #123 123px 123px 123px;
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text-size-adjust: none;
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text-transform: lowercase;
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text-underline-offset: 123px;
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text-underline-position: under;
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top: 123px;
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touch-action: none;
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transform: scale(-1);
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transform-box: fill-box;
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transform-origin: 123px 123px 123px;
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transform-style: preserve-3d;
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transition-delay: 123s;
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transition-duration: 123s;
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transition-property: add;
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transition-timing-function: linear;
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translate: 123px;
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unicode-bidi: plaintext;
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user-select: all;
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vector-effect: non-scaling-stroke;
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vertical-align: 123px;
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visibility: collapse;
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white-space: pre;
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widows: 123;
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width: 123px;
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will-change: height;
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word-break: break-word;
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word-spacing: 123px;
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word-wrap: break-word;
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writing-mode: vertical-lr;
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x: 123px;
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y: 123px;
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z-index: 123;
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zoom: 123;
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}
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@layer layer1 {
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/* Reset properties to their initial value */
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#target {
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all: initial;
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}
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}
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@layer layer2 {
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/* This will be populated with properties set to a non-initial value */
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#target {}
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}
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@layer layer3 {
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/* This should roll back to the values from the previous layer */
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#target.rollback {
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all: revert-layer;
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}
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}
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</style>
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<div id="log"></div>
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<!-- This custom element is unlikely to get important UA styles -->
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<foo-bar id="target"></foo-bar>
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<script src="/resources/testharness.js"></script>
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<script src="/resources/testharnessreport.js"></script>
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<script>
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const { sheet } = document.querySelector("style");
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const nonInitialStyle = sheet.cssRules[0].style;
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const layer2Style = sheet.cssRules[2].cssRules[0].style;
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const target = document.getElementById("target");
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const cs = getComputedStyle(target);
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// Some properties can be forced to compute to their initial value
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// unless another property is set to a certain value.
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function prerequisites(property) {
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switch (property) {
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case "border-block-end-width":
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case "border-block-start-width":
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case "border-bottom-width":
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case "border-inline-end-width":
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case "border-inline-start-width":
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case "border-left-width":
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case "border-right-width":
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case "border-top-width":
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return "border-style: solid";
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case "column-rule-width":
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return "column-rule-style: solid";
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case "outline-width":
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return "outline-style: solid";
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case "rotate":
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case "scale":
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case "transform":
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case "transform-style":
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case "translate":
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return "display: block";
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default:
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return "";
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}
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}
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const initialValues = Object.create(null);
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for (let property of cs) {
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if (!property.startsWith("-")) {
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initialValues[property] = cs.getPropertyValue(property);
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}
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}
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for (let property in initialValues) {
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// Skip property if the stylesheet above doesn't provide a non-initial value.
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// This is to avoid having to update the test every time a new CSS property is added.
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const nonInitialValue = nonInitialStyle.getPropertyValue(property);
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if (nonInitialValue === "") {
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continue;
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}
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test(function() {
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const initialValue = initialValues[property];
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assert_not_equals(initialValue, "", "Should have the initial value.");
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this.add_cleanup(() => {
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layer2Style.cssText = "";
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target.classList.remove("rollback");
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});
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layer2Style.cssText = prerequisites(property);
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layer2Style.setProperty(property, nonInitialValue);
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const changedValue = cs.getPropertyValue(property);
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assert_not_equals(changedValue, initialValue, "Should get a different computed value.");
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target.classList.add("rollback");
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const revertedValue = cs.getPropertyValue(property);
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assert_equals(revertedValue, changedValue, "Layer 3 should rollback to layer 2.");
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}, property);
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}
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</script>
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