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