String Pattern Validation in Typescript

Question

In Typescript, how to validate string pattern? example const str = "ABC1-AB9"

1. max length should be 8
2. string pattern should be xxxx-xxx
3. x can be AZ and 0-9 only

Answer 1

^[A-z0-9]{4}-[A-z0-9]{3} [0-9]{1}

This could be the regex you are looking for. You can test the same by going to https://regexr.com/ website and making your own custom regex.