| <!doctype html> |
| <html> |
| <head> |
| <script src="../../resources/js-test-pre.js"></script> |
| <style> |
| html { |
| background-color:white; |
| } |
| html:nth-last-child(1) { |
| background-color:rgb(1, 2, 3); |
| } |
| html:nth-last-child(-n+1) { |
| background-color:rgb(1, 2, 3); |
| } |
| html:nth-last-child(+1) { |
| background-color:rgb(1, 2, 3); |
| } |
| :root:nth-last-child(1) { |
| background-color:rgb(1, 2, 3); |
| } |
| :root:nth-last-child(-n+1) { |
| background-color:rgb(1, 2, 3); |
| } |
| :root:nth-last-child(+1) { |
| background-color:rgb(1, 2, 3); |
| } |
| |
| svg:nth-last-child(1) { |
| background-color:rgb(1, 2, 3); |
| } |
| svg:root { |
| background-color:rgb(4, 5, 6); |
| } |
| </style> |
| </head> |
| <body> |
| <div style="display:none"> |
| <svg><g></g></svg> |
| </div> |
| </body> |
| <script> |
| description('Verify the nth-last-child() pseudo class matcher always test for the parent element. Some :nth-last-child pseudo selectors can skip counting the siblings, but they should never skip the parent check.'); |
| |
| shouldBe('document.querySelectorAll("html:nth-last-child(1)").length', '0'); |
| shouldBe('document.querySelectorAll("html:nth-last-child(-n+1)").length', '0'); |
| shouldBe('document.querySelectorAll("html:nth-last-child(+1)").length', '0'); |
| shouldBe('document.querySelectorAll(":root:nth-last-child(1)").length', '0'); |
| shouldBe('document.querySelectorAll(":root:nth-last-child(-n+1)").length', '0'); |
| shouldBe('document.querySelectorAll(":root:nth-last-child(+1)").length', '0'); |
| shouldBeEqualToString('getComputedStyle(document.documentElement).backgroundColor', 'rgb(255, 255, 255)'); |
| |
| // This svg document is not the root, ":root" should not match anything, nth-last-child should work. |
| shouldBe('document.querySelectorAll("svg:root").length', '0'); |
| shouldBe('document.querySelectorAll("svg:nth-last-child(1)").length', '1'); |
| shouldBe('document.querySelectorAll("svg:nth-last-child(-n+1)").length', '1'); |
| shouldBe('document.querySelectorAll("svg:nth-last-child(+1)").length', '1'); |
| shouldBeEqualToString('getComputedStyle(document.querySelector("svg")).backgroundColor', 'rgb(1, 2, 3)'); |
| </script> |
| <script src="../../resources/js-test-post.js"></script> |
| </html> |
