Upgrading Angular 4 to Angular 6

Upgrading Angular 4 to Angular 6

I have a small and working Angular 4 project, but would like to make the switch to Angular 6. How do I do this?

What are the odds it will work with no changes?

Here's a sample of the code:

import { Component, Input, OnInit } from '@angular/core';
import { NgFor } from '@angular/common';
import { PuzzlePieceComponent } from '../puzzlepiece/puzzle-piece.component';

@Component({
  selector: 'puzzle-canvas',
  templateUrl: './puzzle-canvas.component.html',
  styleUrls: ['./puzzle-canvas.component.css']
})

export class PuzzleCanvasComponent implements OnInit {
  title = 'Puzzle Peace';
  @Input() piece:PuzzlePieceComponent;
  pieces = [];
  rowNames = [];
  columnNames = [];
  columns:number = 8;
  rows:number = 5;

  constructor() { 
    this.rowNames = ['1', '2', '3', '4', '5' ];
    this.columnNames = ['A', 'B', 'C', 'D', 'E', 'F', 'G', 'H' ];
  }

  fireEvent(e){
      console.log(e.type);
  }

  ngOnInit() { 
    let index = 0;
    for(let row = 0; row < this.rows; row++) {
      for(let column = 0; column < this.columns; column++) {
        this.pieces[index] = new PuzzlePieceComponent();
        this.pieces[index].id=index;
        this.pieces[index].row = this.rowNames[row];
        this.pieces[index].column = this.columnNames[column];
        index++;
      }
    }
  }
}

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curiouswebsterSoftware EngineerAsked:
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Julian HansenCommented:
There is an upgrade process you can follow here
https://update.angular.io/

You have not specified which versions of 4 and 6 you want to target - so go through the guide and then post back if you have issues.

The main thing is - backup your project first so you can restore if needed.

BTW If you are going to upgrade why 6 and not 7?

Looking at the code you posted it should not be to complicated - if you were using ngrx you would have had to make some changes - same with httpclient would need to upgrade to httpclientmodule - but I can't see evidence that you are using those - so it should be straight forward.

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curiouswebsterSoftware EngineerAuthor Commented:
thanks
Julian HansenCommented:
You are welcome.
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