Tutorial: Cordova plugin in Swift. Part 5.

index.js

var app = {
    initialize: function() {
        document.addEventListener('deviceready', this.onDeviceReady.bind(this), false);
    },

    onDeviceReady: function() {
        this.receivedEvent('deviceready');

        echotest.echo('YO BRO!', function(msg) { 
                document.getElementById('deviceready').querySelector('.received').innerHTML = msg;   
            },
            function(err) {
                document.getElementById('deviceready').innerHTML = '<p class="event received">' + err + '</p>'; 
            }
          );
    },

    receivedEvent: function(id) {
        var parentElement = document.getElementById(id);
        var listeningElement = parentElement.querySelector('.listening');
        var receivedElement = parentElement.querySelector('.received');

        listeningElement.setAttribute('style', 'display:none;');
        receivedElement.setAttribute('style', 'display:block;');

        console.log('Received Event: ' + id);
    }
};

app.initialize();