| <!DOCTYPE html> |
| <title>Deleting a @namespace rule when list contains anything other than @import or @namespace rules should throw InvalidStateError.</title> |
| <link rel="help" href="https://drafts.csswg.org/cssom-1/#remove-a-css-rule"> |
| <script src="/resources/testharness.js"></script> |
| <script src="/resources/testharnessreport.js"></script> |
| <style> |
| @namespace a url(); |
| </style> |
| <script> |
| test(function () { |
| let styleSheet = document.styleSheets[0]; |
| styleSheet.cssRules[0]; |
| styleSheet.insertRule(`b {}`, 1); |
| assert_throws_dom("InvalidStateError", () => styleSheet.deleteRule(0)); |
| }, "Deleting a @namespace rule when list contains anything other than @import or @namespace rules should throw InvalidStateError."); |
| </script> |
