brunofullstack / vue-chessboard

Chessboard vue component to load positions, create positions and see threats

vue-chessboard

Chessboard vue component to load positions, create positions and see threats

• It uses chess.js for chess movements and validations
• It uses chessground for chessboard UI chessground

Check live examples: http://vitomd.com/vue-chessboard-examples/

Table of contents

• Installation
• Usage
• Example

Installation

npm install --save vue-chessboard

Default component import

import {chessboard} from 'vue-chessboard'
import 'vue-chessboard/dist/vue-chessboard.css'

Then use it in your template

    <chessboard/>

Browser

<div id="app">
  <chessboard></chessboard>
</div>

<link rel="stylesheet" href="vue-chessboard/dist/vue-chessboard.css"/>

<script src="vue.js"></script>
<script src="vue-chessboard/dist/vue-chessboard.browser.js"></script>

<script>
new Vue({
  el: '#app',
  components: {
    VueChessboard
  }
});
</script>

Examples

Check live examples: http://vitomd.com/vue-chessboard-examples/

Check live examples repository: https://github.com/vitogit/vue-chessboard-examples

Check full application using the component: Chess Guardian

Simple Chessboard with legal moves

  <chessboard/>

Simple Chessboard with free moves

  <chessboard :free="true"/>

Simple Chessboard with black orientation. Default is white

  <chessboard orientation="black"/>

Simple Chessboard that shows threats for current position and player

  <chessboard :showThreats="true"/>

Fen binded to the chessboard (load position when click on a new position)

  <chessboard :fen="currentFen"/>
  <button class="button is-light" @click="loadFen(fen)" v-for="fen in fens">
    {{fen}}
  </button>

Chessboard with onmove callback. Returns positional info { "legal_black": 20, "checks_black": 0, "threat_black": 0, "turn": "black" } after each move.

It also returns the fen and the history data.

  <chessboard @onMove="showInfo"/>
  <div>
    {{this.positionInfo}}
  </div>

showInfo(data) {
  this.positionInfo = data
}

Chessboard with onpromote callback

When there is a promotion it will execute the callback. Just return the first letter of the piece: q:Queen, r:Rook, k:Knight, b:Bishop

  <chessboard :onPromotion="promote"/>

promote() {
  return 'r' // This will promote to a rook
}

Extended Component (Play vs random AI).

You can extend the chessboard component to add new methods

  // newboard.vue
  <script>
  import { chessboard }  from 'vue-chessboard'

  export default {
    name: 'newboard',
    extends: chessboard,
    methods: {
      userPlay() {
        return (orig, dest) => {
          if (this.isPromotion(orig, dest)) {
            this.promoteTo = this.onPromotion()
          }
          this.game.move({from: orig, to: dest, promotion: this.promoteTo}) // promote to queen for simplicity
          this.board.set({
            fen: this.game.fen()
          })
          this.calculatePromotions()
          this.aiNextMove()
        };
      },
      aiNextMove() {
        let moves = this.game.moves({verbose: true})
        let randomMove = moves[Math.floor(Math.random() * moves.length)]
        this.game.move(randomMove)

        this.board.set({
          fen: this.game.fen(),
          turnColor: this.toColor(),
          movable: {
            color: this.toColor(),
            dests: this.possibleMoves(),
            events: { after: this.userPlay()},
          }
        });
      },
    },
    mounted() {
      this.board.set({
        movable: { events: { after: this.userPlay()} },
      })
    }
  }
  </script>

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License

GPL-3.0