Version B: Separate files for Actions and Events

actions.js

'use strict';

var events = require('./events');

module.exports = {
    display: function ( notice ) {
        this.dispatch( events.DISPLAY, notice );
    },

    dismiss: function ( noticeId ) {
        this.dispatch( events.DISMISS, noticeId );
    },

    fetchMixes: function () {
        this.dispatch( events.FETCH_MIXES, mixGroupId );
        API('mixes').getMixGroup({ id: mixGroupId }).then(
            this.dispatch.bind( this, events.FETCH_MIXES_SUCCESS ),
            this.dispatch.bind( this, events.FETCH_MIXES_FAIL )
        );
    }
};

events.js

'use strict';

module.exports = {
    CHANGE: 'change',

    DISPLAY: 'DISPLAY',
    DISMISS: 'DISMISS',

    FETCH_MIXES: 'FETCH_MIXES',
    FETCH_MIXES_SUCCESS: 'FETCH_MIXES_SUCCESS',
    FETCH_MIXES_FAIL: 'FETCH_MIXES_FAIL'
};