regex to identify numeric and alphanumeric
"^[a-zA-Z0-9_]*$"javascript regular expression for alphanumeric
/^[a-z0-9]+$/i
^ Start of string
[a-z0-9] a or b or c or ... z or 0 or 1 or ... 9
+ one or more times (change to * to allow empty string)
$ end of string
/i case-insensitiveregex 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)],regex alphanumeric
/^\w+$/Copyright © 2021 Codeinu
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