vue-events/dist/index.js

Easy event handling for Vue applications.

'use strict';

Object.defineProperty(exports, "__esModule", {
  value: true
});

var _typeof = typeof Symbol === "function" && typeof Symbol.iterator === "symbol" ? function (obj) { return typeof obj; } : function (obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; };

function plugin(Vue) {

  // Exit if the plugin has already been installed.
  if (plugin.installed) return;

  // Create a `vm` to serve as our global event bus.
  var events = new Vue({
    methods: {
      /**
       * Emit the given event.
       *
       * @param {string|object} event
       * @param {...*} args
       */
      emit: function emit(event) {
        for (var _len = arguments.length, args = Array(_len > 1 ? _len - 1 : 0), _key = 1; _key < _len; _key++) {
          args[_key - 1] = arguments[_key];
        }

        this.$emit.apply(this, [event].concat(args));
      },


      /**
       * Emit the given event.
       *
       * @param {string|object} event
       * @param {...*} args
       */
      fire: function fire(event) {
        for (var _len2 = arguments.length, args = Array(_len2 > 1 ? _len2 - 1 : 0), _key2 = 1; _key2 < _len2; _key2++) {
          args[_key2 - 1] = arguments[_key2];
        }

        this.emit.apply(this, [event].concat(args));
      },


      /**
       * Listen for the given event.
       *
       * @param {string} event
       * @param {function} callback
       */
      on: function on(event, callback) {
        this.$on(event, callback);
      },


      /**
       * Listen for the given event.
       *
       * @param {string} event
       * @param {function} callback
       */
      listen: function listen(event, callback) {
        this.on(event, callback);
      },


      /**
       * Listen for the given event once.
       *
       * @param {string} event
       * @param {function} callback
       */
      once: function once(event, callback) {
        this.$once(event, callback);
      },


      /**
       * Remove one or more event listeners.
       *
       * @param {string} event
       * @param {function} callback
       */
      off: function off(event, callback) {
        this.$off(event, callback);
      },


      /**
       * Remove one or more event listeners.
       *
       * @param {string} event
       * @param {function} callback
       */
      remove: function remove(event, callback) {
        this.off(event, callback);
      }
    }
  });

  // Extend `Vue.prototype` to include our global event bus.
  Object.defineProperty(Vue.prototype, '$events', {
    get: function get() {
      return events;
    }
  });

  // Register a mixin that adds an `events` option to Vue 2.0 components.
  Vue.mixin({
    // Hook into the Vue 2.0 `beforeCreate` life-cycle event.
    beforeCreate: function beforeCreate() {
      // Exit if there's no `events` option.
      if (_typeof(this.$options.events) !== 'object') return;
      // Cache of events to bound functions for automatic unsubscriptions
      var eventMap = {};
      // Loop through each event.
      for (var key in this.$options.events) {
        // Assign event type and bound function to map
        eventMap[key] = this.$options.events[key].bind(this);
      }
      // Listen for the `hook:beforeMount` Vue 2.0 life-cycle event.
      this.$once('hook:beforeMount', function () {
        // Loop through each event.
        for (var key in eventMap) {
          // Register a listener for the event.
          events.$on(key, eventMap[key]);
        }
      });
      // Listen for the `hook:beforeDestroy` Vue 2.0 life-cycle event.
      this.$once('hook:beforeDestroy', function () {
        // Loop through each event.
        for (var key in eventMap) {
          // Register a listener for the event.
          events.$off(key, eventMap[key]);
        }
        // Release cache
        eventMap = null;
      });
    }
  });
}

// Check for `window.Vue`
if (typeof window !== 'undefined' && window.Vue) {
  // Install plugin automatically.
  window.Vue.use(plugin);
}

exports.default = plugin;