Angular router

PostEditComponent sample:

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

import { PostInterface } from '@core/interfaces/post.interface';
import { PostService } from '@core/services/post.service';


@Component({
  selector: 'app-post-edit',
  templateUrl: './post-edit.component.html',
  styleUrls: ['./post-edit.component.scss']
})
export class PostEditComponent implements OnInit {
  postForm: FormGroup;
  postData: PostInterface;
  postId: number;

  constructor(private activatedRoute: ActivatedRoute,
              public postService: PostService) {
    this.postId = +this.activatedRoute.snapshot.paramMap.get('id');

    // will console.log if URL will look like: site.com/post/2/edit?action=create
    if (this.activatedRoute.snapshot.queryParamMap.get('action') === 'create') {
      console.log('Created successfully');
    }
  }

  ngOnInit(): void {
    this.postForm = new FormGroup({
      title: new FormControl('', [Validators.required]),
      content: new FormControl('', [Validators.required])
    });

    // populate post form data
    this.postService.getById(this.postId).subscribe((postResponse: PostInterface) => {
	  this.postData = postResponse;
      const postValues = {
        title: this.postData?.title,
        content: this.postData?.content
      };
      this.postForm.patchValue(postValues);
    });

  }

  submit() {
    const postFormData = {
      title: this.postForm.value.title,
      content: this.postForm.value.content
    };
    this.postService.update(this.postData.id, postFormData).subscribe(postResponse => {
      console.log('Updated successfully');
    });
  }

}

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