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contains

Validate that a string contains at least one of the given substrings (case-insensitive).

Signature​

NguardValidators.String.contains(...values: primitive[]): ValidatorFn
ParameterTypeDescription
...valuesprimitive[]One or more substrings — the input must contain at least one of them

Reactive forms​

import { FormControl } from '@angular/forms';
import { NguardValidators } from 'ng-nguard';

const description = new FormControl('', [
    NguardValidators.String.contains('angular', 'nguard'),
]);

Template-driven forms​

<input ngModel name="description" [nguardContains]="['angular', 'nguard']" />

Error key​

{ contains: true }

Notes​

  • The check is case-insensitive.
  • Numbers and booleans are coerced to string before the substring search.
  • Empty strings fail unless an empty-string value is supplied (contains('') always passes against any string).
  • If no values are supplied, validation always fails.

See also​