Method insert

packages/forms/src/model/form_array.ts:213–218

* Insert a new `AbstractControl` at the given `index` in the array. * * @param index Index in the array to insert the control. If `index` is negative, wraps around * from the back. If `index` is greatly negative (less than `-length`), prepends to the array. * This behavior is the sam

(index: number, control: TControl, options: {emitEvent?: boolean} = {})

   * NOTE: Inserting to the FormArray will not mark it dirty. If you want to mark if dirty, call `markAsDirty()`.
   */
  insert(index: number, control: TControl, options: {emitEvent?: boolean} = {}): void {
    this.controls.splice(index, 0, control);

    this._registerControl(control);
    this.updateValueAndValidity({emitEvent: options.emitEvent});
  }

  /**
   * Remove the control at the given `index` in the array.