Method control

packages/forms/src/form_builder.ts:366–384

* @description * Constructs a new `FormControl` with the given state, validators and options. Sets * `{nonNullable: true}` in the options to get a non-nullable control. Otherwise, the * control will be nullable. Accepts a single generic argument, which is the type of the * control's val

(
    formState: T | FormControlState<T>,
    validatorOrOpts?: ValidatorFn | ValidatorFn[] | FormControlOptions | null,
    asyncValidator?: AsyncValidatorFn | AsyncValidatorFn[] | null,
  )

   * {@example forms/ts/formBuilder/form_builder_example.ts region='disabled-control'}
   */
  control<T>(
    formState: T | FormControlState<T>,
    validatorOrOpts?: ValidatorFn | ValidatorFn[] | FormControlOptions | null,
    asyncValidator?: AsyncValidatorFn | AsyncValidatorFn[] | null,
  ): FormControl {
    let newOptions: FormControlOptions = {};
    if (!this.useNonNullable) {
      return new FormControl(formState, validatorOrOpts, asyncValidator);
    }
    if (isAbstractControlOptions(validatorOrOpts)) {
      // If the second argument is options, then they are copied.
      newOptions = validatorOrOpts;
    } else {
      // If the other arguments are validators, they are copied into an options object.
      newOptions.validators = validatorOrOpts;
      newOptions.asyncValidators = asyncValidator;
    }
    return new FormControl<T>(formState, {...newOptions, nonNullable: true});
  }

  /**
   * Constructs a new `FormArray` from the given array of configurations,