CONSOLE MESSAGE: Origin http://127.0.0.1:8000 is not allowed by Access-Control-Allow-Origin. Status code: 200 This test whether a script can read the rules from a cross-origin style sheet. For more information on why we block this, please see https://bugs.webkit.org/show_bug.cgi?id=20527. Test begins. == Cross-Origin resource, no-cors mode == exception thrown for cssRules: SecurityError: Not allowed to access cross-origin stylesheet exception thrown for rules: SecurityError: Not allowed to access cross-origin stylesheet == Same-Origin resource, no-cors mode == cssRules: [object CSSRuleList] cssRules length: 1 rules: [object CSSRuleList] rules length: 1 == Cross-Origin resource, cors mode, failing cors check == exception thrown for cssRules: SecurityError: Not allowed to access cross-origin stylesheet exception thrown for rules: SecurityError: Not allowed to access cross-origin stylesheet == Cross-Origin resource, cors mode, successful cors check == cssRules: [object CSSRuleList] cssRules length: 1 rules: [object CSSRuleList] rules length: 1 Test ends.