I'm having trouble resolving this error that keeps popping up on this particular line of code: "registrationForm : FormGroup;" Can anyone help me troubleshoot this

***Issue: src/app/r-form-example/r-form-example.component.ts:11:3 - error TS2564: Property 'registrationForm' lacks an initializer and is not definitely set in the constructor.

An error has been detected in the code snippet above.


import { Component, OnInit } from '@angular/core';
import { FormBuilder, FormControl, FormGroup } from '@angular/forms';

@Component({
  selector: 'app-r-form-example',
  templateUrl: './r-form-example.component.html',
  styleUrls: ['./r-form-example.component.css']
})
export class RFormExampleComponent implements OnInit {

  registrationForm : FormGroup;

  constructor( private fb : FormBuilder) {
   }

  ngOnInit(): void {
    // this.registrationForm = new FormGroup({
    //   'firstName': new FormControl(),
    //   'lastName': new FormControl(),
    // })
    this.registrationForm = this.fb.group({
      'firstName': new FormControl(),
      'lastName':new FormControl()
    });
  }
  
  addRegistration(){
    console.log(this.registrationForm.value);
  }

}

Answer №1

When setting up your TypeScript configurations, remember that you must assign a value to any declared variable either at declaration or in the constructor. Here's an example of how to declare a variable:

 userForm!: FormGroup

You can also assign a value to the variable in the constructor.

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