PatternValidator

A Directive that adds the pattern validator to any controls marked with the pattern attribute, via the NG_VALIDATORS binding. Uses attribute value as the regex to validate Control value against. Follows pattern attribute semantics; i.e. regex must match entire Control value.

NgModules

• FormsModule

• ReactiveFormsModule

Selectors

• [pattern][formControlName]
• [pattern][formControl]
• [pattern][ngModel]

Properties

Property	Description
@Input()pattern: string | RegExp

Description

Example

<input [name]="fullName" pattern="[a-zA-Z ]*" ngModel>

Methods

ngOnChanges()
ngOnChanges(changes: SimpleChanges): void Parameters changes Type: SimpleChanges. Returns void

validate()
validate(control: AbstractControl): ValidationErrors | null Parameters control Type: AbstractControl. Returns ValidationErrors | null

registerOnValidatorChange()
registerOnValidatorChange(fn: () => void): void Parameters fn Type: () => void. Returns void