Function setUpControlValueAccessor

packages/forms/src/directives/shared.ts:82–109

(
  control: FormControl,
  dir: NgControl,
  callSetDisabledState: SetDisabledStateOption = setDisabledStateDefault,
)

 * @param dir Directive that should be linked with a given control.
 */
export function setUpControlValueAccessor(
  control: FormControl,
  dir: NgControl,
  callSetDisabledState: SetDisabledStateOption = setDisabledStateDefault,
): void {
  if (typeof ngDevMode === 'undefined' || ngDevMode) {
    if (!control) _throwError(dir, 'Cannot find control with');
    if (!dir.valueAccessor) _throwMissingValueAccessorError(dir);
  }

  setUpValidators(control, dir);

  dir.valueAccessor!.writeValue(control.value);

  // The legacy behavior only calls the CVA's `setDisabledState` if the control is disabled.
  // If the `callSetDisabledState` option is set to `always`, then this bug is fixed and
  // the method is always called.
  if (control.disabled || callSetDisabledState === 'always') {
    dir.valueAccessor!.setDisabledState?.(control.disabled);
  }

  setUpViewChangePipeline(control, dir);
  setUpModelChangePipeline(control, dir);

  setUpBlurPipeline(control, dir);

  setUpDisabledChangeHandler(control, dir);
}

/**
 * Reverts configuration performed by the `setUpControl` control function.