角度材质2-手动将字段/控件设置为无效

最后,我如何将CSS错误类添加到嵌套反应式表单中无效的字段中:

 this.invalidControls(this.formGroup); //Call it just after submit the form

 //The implementation of the function
 invalidControls(name): void {
    for (const field in name.controls) {
      const control = name.get(field);

      if(control.constructor.name == "FormArray" || control.constructor.name == "FormGroup"){
        this.invalidControls(control); //If the AbstractControl is not a FormControl the funtion will be called again
      }
      else{
        if(control.status === "INVALID"){
          control.markAsTouched({ onlySelf: true });
          control.markAsDirty({ onlySelf: true });
        }
      }
    }
  }

因此,如果将控件设置为 无效的 ,则, 肮脏的 ,它是 空的 ,将添加CSS错误类。否则不会。