| <!doctype html> |
| <title>CSS Container Queries Test: custom property style query changes</title> |
| <link rel="help" href="https://drafts.csswg.org/css-contain-3/#style-container"> |
| <script src="/resources/testharness.js"></script> |
| <script src="/resources/testharnessreport.js"></script> |
| <script src="support/cq-testcommon.js"></script> |
| <style> |
| #container { container-name: my-container; } |
| #child, #grandchild { color: red; } |
| @container style(--target: child) { |
| #child { color: green; } |
| } |
| @container my-container style(--target: grandchild) { |
| #grandchild { color: green; } |
| } |
| </style> |
| <div id="container"> |
| <div id="child"></div> |
| <div> |
| <div id="grandchild"></div> |
| </div> |
| </div> |
| <script> |
| setup(() => assert_implements_container_queries()); |
| |
| const green = "rgb(0, 128, 0)"; |
| const red = "rgb(255, 0, 0)"; |
| |
| test(() => { |
| assert_equals(getComputedStyle(child).color, red); |
| assert_equals(getComputedStyle(grandchild).color, red); |
| }, "Initially no queries match."); |
| |
| test(() => { |
| container.style.setProperty("--target", "child"); |
| assert_equals(getComputedStyle(child).color, green); |
| assert_equals(getComputedStyle(grandchild).color, red); |
| }, "Target child"); |
| |
| test(() => { |
| container.style.setProperty("--target", "grandchild"); |
| assert_equals(getComputedStyle(child).color, red); |
| assert_equals(getComputedStyle(grandchild).color, green); |
| }, "Target grandchild"); |
| </script> |
| |
| <style> |
| @property --length { |
| syntax: "<length>"; |
| inherits: false; |
| initial-value: 0px; |
| } |
| |
| #reg_container { |
| container-name: my-reg-container; |
| font-size: 50px; |
| } |
| #reg_child, #reg_grandchild { color: red; } |
| @container style(--length: 100px) { |
| #reg_child { color: green; } |
| } |
| @container my-reg-container style(--length: 200px) { |
| #reg_grandchild { color: green; } |
| } |
| </style> |
| <div id="reg_container"> |
| <div id="reg_child"></div> |
| <div> |
| <div id="reg_grandchild"></div> |
| </div> |
| </div> |
| <script> |
| test(() => { |
| assert_equals(getComputedStyle(reg_child).color, red); |
| assert_equals(getComputedStyle(reg_grandchild).color, red); |
| }, "Initially no queries for registered property match."); |
| |
| test(() => { |
| reg_container.style.setProperty("--length", "2em"); |
| assert_equals(getComputedStyle(reg_child).color, green); |
| assert_equals(getComputedStyle(reg_grandchild).color, red); |
| }, "Registered property query child"); |
| |
| test(() => { |
| reg_container.style.setProperty("--length", "200px"); |
| assert_equals(getComputedStyle(reg_child).color, red); |
| assert_equals(getComputedStyle(reg_grandchild).color, green); |
| }, "Registered property query grandchild"); |
| </script> |