Feature Request: digits with decimals

[pasevin]

Nice library! I was looking forward to using it, but didn't find the only validator I need at the moment :)

I would like to validate digits with certain number of decimal places.

If decimal places set to 2:
0.12 -> Valid
0.123 -> Invalid

Maybe this can be helpful (my 2 decimal places validator):

export class DecimalValidator {
	static validate(formGroup: FormGroup): any {
		if (formGroup.pristine || !formGroup.value) {
			return undefined;
		}

		const TWO_DECIMAL_REGEXP = /^\d*(?:[.,]\d{1,2})?$/;
		formGroup.markAsTouched();
		if (TWO_DECIMAL_REGEXP.test(formGroup.value)) {
			return undefined;
		}
		return {
			invalidDecimal: true
		};
	}
}

[rsaenen]

Thanks, I will check it for the next release.

[beradrian]

You can use a pattern validator for this like the one in your code.