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f6a096e3d4
Replace `new Error()` in a forms Validators function with `RuntimeError`, for better tree-shakability. Also, improve the error messages, and add documentation. PR Close #46537
877 B
877 B
@name Wrong Async Validator Return Type @category forms @shortDescription Async validator must return a Promise or Observable
@description Async validators must return a promise or an observable, and emit/resolve them whether the validation fails or succeeds. In particular, they must implement the AsyncValidatorFn API
export function isTenAsync(control: AbstractControl):
Observable<ValidationErrors> | null {
const v: number = control.value;
if (v !== 10) {
// Emit an object with a validation error.
return of({ 'notTen': true, 'requiredValue': 10 });
}
// Emit null, to indicate no error occurred.
return of(null);
}
@debugging Did you mistakenly use a synchronous validator instead of an async validator?
@reviewed 2022-06-28