regex to identify numeric and alphanumeric
"^[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)],Copyright © 2021 Codeinu
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