Patching form group value into an Array

patchingAsDefault.js

  // Patch value to default
displayData: string[];  

patchCreateAsDefault(mainControl: FormGroup): void {
  
    //  Check if the formgroup is valid or not first   
    if (mainControl.valid) {
      
      // Get raw value of formgroup, for nested form       
      const formObj = mainControl.getRawValue();
      
      // Assign a new reference       
      const serializeForm = JSON.stringify(formObj);
      
      // Push/assign to Array (current: push)
      this.displayData.push(JSON.parse(serializeForm));
      
      // Assign       
//       this.displayData = JSON.parse(
//         JSON.stringify(this.defaultData)
//       );
    }
  }