var patt = /^(?=.*[a-zA-Z0-9.!@#&*\\-\\u0080-\\u052F])[a-zA-Z0-9\\s.!@#&*\',\\-\\u0080-\\u052F]*$/; console.log(patt.test(\"\\u002f\"));
I
You can escape a / character, by using \/.
/
\/
Using unicode will actually result in the absolute same result, as using the character itself - and therefore will not solve your problem.