Answers for "regex for non alphanumeric characters"

regex allow alphanumeric and special characters

/^[ A-Za-z0-9_@./#&+-]*$/

alphanumeric regex validation

validPattern = "^[a-zA-Z0-9]{10}$"; // alphanumeric exact 10 letters
this.projectForm = this.fb.group({
 ...
 CIG: [null, [Validators.required, Validators.pattern(this.validPattern)],