This is an event that fires when Cordova is fully loaded.

document.addEventListener("deviceready", yourCallbackFunction, false);


This is a very important event that every Cordova application should use.

Cordova consists of two code bases: native and JavaScript. While the native code is loading, a custom loading image is displayed. However, JavaScript is only loaded once the DOM loads. This means your web application could, potentially, call a Cordova JavaScript function before it is loaded.

The Cordova deviceready event fires once Cordova has fully loaded. After the device has fired, you can safely make calls to Cordova function.

Typically, you will want to attach an event listener with document.addEventListener once the HTML document's DOM has loaded.

Supported Platforms

  • Android
  • BlackBerry WebWorks (OS 5.0 and higher)
  • iOS
  • Windows Phone 7
  • Bada 1.2 & 2.x

Quick Example

document.addEventListener("deviceready", onDeviceReady, false);

function onDeviceReady() {
    // Now safe to use the Cordova API

Full Example

<!DOCTYPE html>
    <title>Cordova Device Ready Example</title>

    <script type="text/javascript" charset="utf-8" src="cordova-1.8.0.js"></script>
    <script type="text/javascript" charset="utf-8">

    // Call onDeviceReady when Cordova is loaded.
    // At this point, the document has loaded but cordova-1.8.0.js has not.
    // When Cordova is loaded and talking with the native device,
    // it will call the event `deviceready`.
    function onLoad() {
        document.addEventListener("deviceready", onDeviceReady, false);

    // Cordova is loaded and it is now safe to make calls Cordova methods
    function onDeviceReady() {
        // Now safe to use the Cordova API

  <body onload="onLoad()">