regex para identificar numéricos y alfanuméricos
"^[a-zA-Z0-9_]*$"
Troubled Tarantula
"^[a-zA-Z0-9_]*$"
string.replace(/[^a-zA-Z0-9_]+/g, '')
validPattern = "^[a-zA-Z0-9]{10}$"; // alphanumeric exact 10 letters
this.projectForm = this.fb.group({
...
CIG: [null, [Validators.required, Validators.pattern(this.validPattern)],