license: Licensed to the Apache Software Foundation (ASF) under one or more contributor license agreements. See the NOTICE file distributed with this work for additional information regarding copyright ownership. The ASF licenses this file to you under the Apache License, Version 2.0 (the “License”); you may not use this file except in compliance with the License. You may obtain a copy of the License at

       http://www.apache.org/licenses/LICENSE-2.0

     Unless required by applicable law or agreed to in writing,
     software distributed under the License is distributed on an
     "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
     KIND, either express or implied.  See the License for the
     specific language governing permissions and limitations
     under the License.

deviceready

The event fires when Cordova is fully loaded.

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

Details

This event is essential to any application. It signals that Cordova's device APIs have loaded and are ready to access.

Cordova consists of two code bases: native and JavaScript. While the native code loads, a custom loading image displays. However, JavaScript only loads once the DOM loads. This means the web app may potentially call a Cordova JavaScript function before the corresponding native code becomes available.

The deviceready event fires once Cordova has fully loaded. Once the event fires, you can safely make calls to Cordova APIs. Applications typically attach an event listener with document.addEventListener once the HTML document's DOM has loaded.

The deviceready event behaves somewhat differently from others. Any event handler registered after the deviceready event fires has its callback function called immediately.

Supported Platforms

  • Amazon Fire OS
  • Android
  • BlackBerry 10
  • iOS
  • Tizen
  • Windows Phone 8
  • Windows 8

Quick Example

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

function onDeviceReady() {
    // Now safe to use device APIs
}

Full Example

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

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

    // Wait for device API libraries to load
    //
    function onLoad() {
        document.addEventListener("deviceready", onDeviceReady, false);
    }

    // device APIs are available
    //
    function onDeviceReady() {
        // Now safe to use device APIs
    }

    </script>
  </head>
  <body onload="onLoad()">
  </body>
</html>