"Creating a sleek and efficient AI chess game using chess.js with Angular's

Cannot read property 'moves' of undefine

Hello there! I am currently working on developing a chess game using Angular.

I'm facing an issue with the artificial intelligence in the game where the piece seems to get stuck in the mouse.

The libraries I am currently using for this project are chess.js and the chessboard library. However, the problem lies in the fact that the AI is predominantly written in jQuery.

If I comment out those specific lines, everything else works but the AI functionality stops functioning.

Here's some Angular code snippet:

import { Component, OnInit } from '@angular/core';
import * as ChessBoard from 'chessboardjs/www/js/chessboard';
declare var $: any;

declare var ChessBoard: any;
declare var Chess: any;
@Component({
  selector: 'app-chess',
  templateUrl: './chess.component.html',
  styleUrls: ['./chess.component.scss']
})
export class ChessComponent implements OnInit {
  board: any;
  game: any;

  constructor() { }

  ngOnInit() {
      let minimaxDepth = 2;
      initGame();

    function setDepth(depth){
      console.log("this is "+depth);
      document.getElementById('difficulty').style.display = 'none';
      document.getElementById('chessboard').style.display = 'block';
      document.getElementById('restart').style.display = 'block';
      console.log(depth);
      minimaxDepth = depth;
    }

    // Other functions and logic for the chess game

}


// Other parts of the code...

<div class=" alert alerta-game alert-warning alert-dismissible fade show" role="alert">

  <p>
    <strong>Attention: </strong>this game is in development.
  </p>
</div>
<div class="menu" id="difficulty">
  <br>
  <h1>Select Difficulty:</h1>
  <hr><br>...
</div>

Answer №1

It appears that you've simply copied and pasted a JavaScript file into a component, but unfortunately, this approach is not going to be successful.

  1. Instead of using "getElementById," try utilizing a Reactive Form in Angular for a more effective approach.

  2. When handling the "click" event, opt for an Angular method attached to the element to execute actions upon user click.

  3. The same principle applies to "onDrag" and "orDrop" events, among others.

  4. Avoid using anonymous functions and opt for Fat Arrow "=>" instead to eliminate the need for binding "this" in most cases.

In summary, simply throwing vanilla JS code into the ngOnInit method will not suffice. You must adapt the code, particularly focusing on event handling and view updating logic. It seems like you are attempting to integrate a JS library primarily focused on event control and view rendering, along with a few AI methods, so this task may not be straightforward.

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