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@angular/formscode
PatternValidator
directive
stable
A directive that adds regex pattern validation to controls marked with the
pattern attribute. The regex must match the entire control value.
The directive is provided with the NG_VALIDATORS multi-provider list.
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API
class PatternValidator extends AbstractValidatorDirective { @Input() pattern: string | RegExp; override enabled(input: unknown): boolean;}
enabled
booleanDetermines whether this validator should be active or not based on an input.
Base class implementation checks whether an input is defined (if the value is different from
null and undefined). Validator classes that extend this base class can override this
function with the logic specific to a particular validator directive.
@paraminput
unknown@returns
booleanDescription
A directive that adds regex pattern validation to controls marked with the
pattern attribute. The regex must match the entire control value.
The directive is provided with the NG_VALIDATORS multi-provider list.
Exported by
Usage Notes
Adding a pattern validator
The following example shows how to add a pattern validator to an input attached to an ngModel binding.
<input name="firstName" ngModel pattern="[a-zA-Z ]*">Jump to details