Angular: Write an Exclude List Character Validator for Formbuilder

I am want to write an Angular FormBuilder validator that excludes a certain list of characters: @##$%^&*()[email protected]#

Want to write it as exclusion list validator, so we can add maybe Certain Letters or other text in future.



This answer writes it as an Include List instead of Exclude List


write an ng-pattern to disallow whitespaces and special characters

Source: Angular Questions

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