Vue-Socket.io/src/index.js

import Mixin from './mixin';
import Logger from './logger';
import Listener from './listener';
import Emitter from './emitter';
import SocketIO from 'socket.io-client';

export default class VueSocketIO {

    /**
     * lets take all resource
     * @param io
     * @param vuex
     * @param debug
     * @param options
     */
    constructor({connection, vuex, debug, options}){

        Logger.debug = debug;
        this.io = this.connect(connection, options);
        this.useConnectionNamespace = (options && options.useConnectionNamespace) || false;
        this.emitter = new Emitter(vuex);
        this.listener = new Listener(this.io, this.emitter);

    }

    /**
     * Vue.js entry point
     * @param Vue
     */
    install(Vue){

        const namespace = this.io.nsp.replace("/", "");

        if (this.useConnectionNamespace) {
          if (typeof Vue.prototype.$socket === "object") {
            Vue.prototype.$socket = {
              ...Vue.prototype.$socket,
              [namespace]: this.io
            };

            Vue.prototype.$vueSocketIo = {...Vue.prototype.$vueSocketIo, [namespace]: this};
          } else {
            Vue.prototype.$socket = {
              [namespace]: this.io
            };
            Vue.prototype.$vueSocketIo = { [namespace]: this};
          }
        } else {
          Vue.prototype.$socket = this.io;
          Vue.prototype.$vueSocketIo = this;
        }
      
        Vue.mixin(Mixin);

        Logger.info('Vue-Socket.io plugin enabled');

    }


    /**
     * registering SocketIO instance
     * @param connection
     * @param options
     */
    connect(connection, options){

        if(connection && typeof connection === 'object'){

            Logger.info('Received socket.io-client instance');

            return connection;

        } else if(typeof connection === 'string'){

            Logger.info('Received connection string');

            return this.io = SocketIO(connection, options);

        } else {

            throw new Error('Unsupported connection type');

        }

    }

}