| <!DOCTYPE HTML> |
| <html> |
| |
| <head> |
| <meta charset="utf-8"> |
| <title>Changing content targetting :has-slotted through multiple shadow roots</title> |
| <link rel="help" href="https://github.com/w3c/csswg-drafts/pull/10586"> |
| <script src="/resources/testharness.js"></script> |
| <script src="/resources/testharnessreport.js"></script> |
| <script src="/resources/testdriver.js"></script> |
| <script src="/resources/testdriver-vendor.js"></script> |
| <script src="/resources/testdriver-actions.js"></script> |
| </head> |
| |
| <body> |
| |
| <my-element id="test">Test</my-element> |
| <template id="myTemplate"> |
| <slot></slot> |
| <p id="target">This text will be styled.</p> |
| <style> |
| p { |
| color: rgb(0 255 0); |
| } |
| slot:not(:has-slotted) + p { |
| color: rgb(0 0 255); |
| } |
| </style> |
| </template> |
| |
| <script> |
| customElements.define('my-element', class extends HTMLElement { |
| constructor() { |
| super(); |
| this.attachShadow({ |
| mode: 'open', |
| slotAssignment: 'manual', |
| }); |
| this.shadowRoot.append(myTemplate.content.cloneNode(true)); |
| } |
| |
| get slot() { |
| return this.shadowRoot.querySelector('slot'); |
| } |
| }); |
| |
| const blue = 'rgb(0, 0, 255)'; |
| const green = 'rgb(0, 255, 0)'; |
| test(function (t) { |
| const test = document.getElementById('test'); |
| const target = test.shadowRoot.getElementById('target'); |
| t.add_cleanup(() => { test.innerHTML = 'Test' }); |
| let styles = getComputedStyle(target); |
| assert_equals(styles.getPropertyValue('color'), blue); |
| }, "empty node is blue"); |
| |
| test(function (t) { |
| const test = document.getElementById('test'); |
| const target = test.shadowRoot.getElementById('target'); |
| t.add_cleanup(() => { test.innerHTML = 'Test' }); |
| test.slot.assign(test.childNodes[0]) |
| styles = getComputedStyle(target); |
| assert_equals(test.slot.assignedNodes().length, 1); |
| assert_equals(styles.getPropertyValue('color'), green); |
| test.slot.assign() |
| styles = getComputedStyle(target); |
| assert_equals(styles.getPropertyValue('color'), blue); |
| }, "manually assigning a text node is green, emptying assignment is blue"); |
| |
| test(function (t) { |
| const test = document.getElementById('test'); |
| const target = test.shadowRoot.getElementById('target'); |
| t.add_cleanup(() => { test.innerHTML = 'Test' }); |
| |
| test.innerHTML = '<div></div>'; |
| assert_equals(styles.getPropertyValue('color'), blue); |
| |
| test.slot.assign(...test.children) |
| styles = getComputedStyle(target); |
| assert_equals(test.slot.assignedNodes().length, 1); |
| assert_equals(styles.getPropertyValue('color'), green); |
| test.slot.assign() |
| styles = getComputedStyle(target); |
| assert_equals(styles.getPropertyValue('color'), blue); |
| }, "manually assigning a Element is green, emptying assignment is blue"); |
| </script> |
| </body> |
| |
| </html> |
