84 lines
3.6 KiB
HTML
84 lines
3.6 KiB
HTML
<!doctype html>
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<title>Cascade order of a stylesheet for duplicate sheets.</title>
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<link rel="author" title="Emilio Cobos Álvarez" href="mailto:emilio@crisal.io">
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<link rel="help" href="https://wicg.github.io/construct-stylesheets/">
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<script src = '/resources/testharness.js'></script>
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<script src = '/resources/testharnessreport.js'></script>
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<div id="target"></div>
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<script>
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function attachShadowDiv(host) {
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const shadowRoot = host.attachShadow({mode: 'open'});
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const shadowDiv = document.createElement("div");
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shadowRoot.appendChild(shadowDiv);
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return shadowDiv;
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}
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function blueSheetsWithIncreasingZIndex(n) {
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let sheets = [];
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for (let i = 0; i < n; ++i) {
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sheets.push(new CSSStyleSheet());
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sheets[i].replaceSync("div { z-index: " + i + "; color: blue; }");
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}
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return sheets;
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}
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let sheets = [];
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test(function() {
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sheets = blueSheetsWithIncreasingZIndex(2);
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document.adoptedStyleSheets = [sheets[1], sheets[0], sheets[1]];
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assert_equals(getComputedStyle(document.querySelector("div")).zIndex, "1", "duplicate stylesheet should take right position in the cascade");
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document.adoptedStyleSheets = [];
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}, "Duplicate stylesheets have the right cascade position in the Document");
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test(function() {
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sheets = blueSheetsWithIncreasingZIndex(2);
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const sheet = new CSSStyleSheet();
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sheet.replaceSync("div { color: red; }");
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document.adoptedStyleSheets = [sheets[1], sheets[0]];
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assert_equals(getComputedStyle(document.querySelector("div")).zIndex, "0", "backmost stylesheet should take precedence");
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assert_equals(getComputedStyle(document.querySelector("div")).color, "rgb(0, 0, 255)", "backmost stylesheet should take precedence");
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document.adoptedStyleSheets = [sheets[1], sheets[0], sheets[1], sheet];
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assert_equals(getComputedStyle(document.querySelector("div")).zIndex, "1", "duplicate stylesheet should take the right position in the cascade");
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assert_equals(getComputedStyle(document.querySelector("div")).color, "rgb(255, 0, 0)", "backmost stylesheet should take precedence");
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document.adoptedStyleSheets = [];
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}, "Appending duplicate stylesheets yields the correct cascade position in the Document");
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test(function() {
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sheets = blueSheetsWithIncreasingZIndex(2);
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const span = document.createElement("span");
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target.appendChild(span);
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attachShadowDiv(span);
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span.shadowRoot.adoptedStyleSheets = [sheets[1], sheets[0], sheets[1]];
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assert_equals(getComputedStyle(span.shadowRoot.querySelector("div")).zIndex, "1", "duplicate stylesheet should take right position in the cascade");
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}, "Duplicate stylesheets have the right cascade position in the ShadowRoot");
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test(function() {
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sheets = blueSheetsWithIncreasingZIndex(2);
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const sheet = new CSSStyleSheet();
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sheet.replaceSync("div { color: red; }");
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const span = document.createElement("span");
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target.appendChild(span);
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attachShadowDiv(span);
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span.shadowRoot.adoptedStyleSheets = [sheets[1], sheets[0]];
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assert_equals(getComputedStyle(span.shadowRoot.querySelector("div")).zIndex, "0", "backmost stylesheet should take precedence");
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assert_equals(getComputedStyle(span.shadowRoot.querySelector("div")).color, "rgb(0, 0, 255)", "backmost stylesheet should take precedence");
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span.shadowRoot.adoptedStyleSheets = [sheets[1], sheets[0], sheets[1], sheet];
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assert_equals(getComputedStyle(span.shadowRoot.querySelector("div")).zIndex, "1", "duplicate stylesheet should take right position in the cascade");
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assert_equals(getComputedStyle(span.shadowRoot.querySelector("div")).color, "rgb(255, 0, 0)", "backmost stylesheet should take precedence");
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}, "Appending duplicate stylesheets yields the correct cascade position in the ShadowRoot");
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</script>
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