Nested Validations in angular 6?

Question

I want to put a validation in angular 6. It should contain alpha numeric characters. Either Alphabets or Numeric, 3 to 9 digits only. It should start with 1 if it is Numeric.

Can anybody help me with these validation ?

Validators.pattern("[^[A-Z a-z | \d 1 ] ]")

Can anybody please help me in this?

Try `^(?:1\d{2,8}|[A-Za-z]{3,9})$` https://regex101.com/r/k8P4oF/1 Should the alphabets also be 3 - 9 characters? — The fourth bird, Mar 04 '20 at 13:00
create a function and set the flag using if-else loop and use the lag in place of validation — Sanjay Lohar, Mar 04 '20 at 13:00
You can create custom validator with which you can check multiple regex or conditions. — Pujan Shah, Mar 04 '20 at 13:01
See https://stackoverflow.com/questions/48350506/how-to-validate-password-strength-with-angular-5-validator-pattern — Wiktor Stribiżew, Mar 04 '20 at 13:18
@Thefourthbird yes, the alphabets should also be 3-9 chars, & if it starts with number it should only start with 1 — sai, Mar 04 '20 at 13:39

score 1 · Accepted Answer · answered Mar 04 '20 at 13:44

You could match either 9 digits, starting with 1 and followed by 8 digits 0-9 or match a char a-zA-Z and repeat that 9 times using an alternation

^(?:1\d{2,8}|[A-Za-z]{3,9})$

Explanation

^ Start of string
(?: Non capture group
- 1\d{2,8} Match 1 followed by 2-8 digits to match 3-9 times
- | Or
- [A-Za-z]{3,9} Match a char a-zA-Z and repeat that 3-9 times
) Close group
$ End of string

Regex demo

Nested Validations in angular 6?

1 Answers1