Events

Events

Cordova lifecycle events.

Event Types


deviceready

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

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

Details

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

Quick Example

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

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

Full Example

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

    <script type="text/javascript" charset="utf-8" src="cordova-1.6.1.js"></script>
    <script type="text/javascript" charset="utf-8">

    // Call onDeviceReady when Cordova is loaded.
    //
    // At this point, the document has loaded but cordova-1.6.1.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
    }

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

pause

This is an event that fires when a Cordova application is put into the background.

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

Details

Cordova consists of two code bases: native and JavaScript. While the native code puts the application into the background the pause event is fired.

Typically, you will want to attach an event listener with document.addEventListener once you receive the Cordova 'deviceready' event.

Supported Platforms

Quick Example

document.addEventListener("pause", onPause, false);

function onPause() {
    // Handle the pause event
}

Full Example

<!DOCTYPE html>
<html>
  <head>
    <title>Cordova Pause Example</title>

    <script type="text/javascript" charset="utf-8" src="cordova-1.6.1.js"></script>
    <script type="text/javascript" charset="utf-8">

    // Call onDeviceReady when Cordova is loaded.
    //
    // At this point, the document has loaded but cordova-1.6.1.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() {
        document.addEventListener("pause", onPause, false);
    }

    // Handle the pause event
    //
    function onPause() {
    }

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

iOS Quirks

In the pause handler, any calls that go through Objective-C will not work, nor will any calls that are interactive, like alerts. This means that you cannot call console.log (and its variants), or any calls from Plugins or the Cordova API. These will only be processed when the app resumes (processed on the next run-loop).


resume

This is an event that fires when a Cordova application is retrieved from the background.

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

Details

Cordova consists of two code bases: native and JavaScript. While the native code pulls the application from the background the resume event is fired.

Typically, you will want to attach an event listener with document.addEventListener once you receive the Cordova 'deviceready' event.

Supported Platforms

Quick Example

document.addEventListener("resume", onResume, false);

function onResume() {
    // Handle the resume event
}

Full Example

<!DOCTYPE html>
<html>
  <head>
    <title>Cordova Resume Example</title>

    <script type="text/javascript" charset="utf-8" src="cordova-1.6.1.js"></script>
    <script type="text/javascript" charset="utf-8">

    // Call onDeviceReady when Cordova is loaded.
    //
    // At this point, the document has loaded but cordova-1.6.1.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() {
        document.addEventListener("resume", onResume, false);
    }

    // Handle the resume event
    //
    function onResume() {
    }

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

iOS Quirks

Any calls to console.log during your pause event handler will be run now when the app resumes, see the iOS Quirks section for the pause event for an explanation.


online

This is an event that fires when a Cordova application is online (connected to the Internet).

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

Details

When the application's network connection changes to being online, the online event is fired.

Typically, you will want to attach an event listener with document.addEventListener once you receive the Cordova 'deviceready' event.

Supported Platforms

Quick Example

document.addEventListener("online", onOnline, false);

function onOnline() {
    // Handle the online event
}

Full Example

<!DOCTYPE html>
<html>
  <head>
    <title>Cordova Online Example</title>

    <script type="text/javascript" charset="utf-8" src="cordova-1.6.1.js"></script>
    <script type="text/javascript" charset="utf-8">

    // Call onDeviceReady when Cordova is loaded.
    //
    // At this point, the document has loaded but cordova-1.6.1.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() {
        document.addEventListener("online", onOnline, false);
    }

    // Handle the online event
    //
    function onOnline() {
    }

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

iOS Quirks

During initial startup, the first online event (if applicable) will take at least a second to fire.

Windows Phone 7 Quirks

When running in the Emulator, the connection.status of the device is always unknown, and this event will NOT fire.


offline

This is an event that fires when a Cordova application is offline (not connected to the Internet).

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

Details

When the application's network connection changes to being offline, the offline event is fired.

Typically, you will want to attach an event listener with document.addEventListener once you receive the Cordova 'deviceready' event.

Supported Platforms

Quick Example

document.addEventListener("offline", onOffline, false);

function onOffline() {
    // Handle the offline event
}

Full Example

<!DOCTYPE html>
<html>
  <head>
    <title>Cordova Offline Example</title>

    <script type="text/javascript" charset="utf-8" src="cordova-1.6.1.js"></script>
    <script type="text/javascript" charset="utf-8">

    // Call onDeviceReady when Cordova is loaded.
    //
    // At this point, the document has loaded but cordova-1.6.1.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() {
        document.addEventListener("offline", onOffline, false);
    }

    // Handle the offline event
    //
    function onOffline() {
    }

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

iOS Quirks

During initial startup, the first offline event (if applicable) will take at least a second to fire.

Windows Phone 7 Quirks

When running in the Emulator, the connection.status of the device is always unknown, and this event will NOT fire.


backbutton

This is an event that fires when the user presses the back button.

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

Details

If you need to override the default back button behaviour you can register an event listener for the 'backbutton' event. It is no longer necessary to call any other method to over ride the back button behaviour. Now, you only need to register an event listener for 'backbutton'.

Typically, you will want to attach an event listener with document.addEventListener once you receive the Cordova 'deviceready' event.

Supported Platforms

Quick Example

document.addEventListener("backbutton", onBackKeyDown, false);

function onBackKeyDown() {
    // Handle the back button
}

Full Example

<!DOCTYPE html>
<html>
  <head>
    <title>Cordova Back Button Example</title>

    <script type="text/javascript" charset="utf-8" src="cordova-1.6.1.js"></script>
    <script type="text/javascript" charset="utf-8">

    // Call onDeviceReady when Cordova is loaded.
    //
    // At this point, the document has loaded but cordova-1.6.1.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 call Cordova methods
    //
    function onDeviceReady() {
        // Register the event listener
        document.addEventListener("backbutton", onBackKeyDown, false);
    }

    // Handle the back button
    //
    function onBackKeyDown() {
    }

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

batterycritical

This is an event that fires when a Cordova application detects the battery has reached the critical level threshold.

window.addEventListener("batterycritical", yourCallbackFunction, false);

Details

This event that fires when a Cordova application detects the percentage of battery has reached the critical battery threshold. This value is device specific.

The batterycritical handler will be called with an object that contains two properties:

Typically, you will want to attach an event listener with window.addEventListener once you receive the Cordova 'deviceready' event.

Supported Platforms

Quick Example

window.addEventListener("batterycritical", onBatteryCritical, false);

function onBatteryCritical(info) {
    // Handle the battery critical event
    alert("Battery Level Critical " + info.level + "%\nRecharge Soon!"); 
}

Full Example

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

    <script type="text/javascript" charset="utf-8" src="cordova-1.6.1.js"></script>
    <script type="text/javascript" charset="utf-8">

    // Call onDeviceReady when Cordova is loaded.
    //
    // At this point, the document has loaded but cordova-1.6.1.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() {
        window.addEventListener("batterycritical", onBatteryCritical, false);
    }

    // Handle the batterycritical event
    //
    function onBatteryCritical(info) {
        alert("Battery Level Critical " + info.level + "%\nRecharge Soon!"); 
    }

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

batterylow

This is an event that fires when a Cordova application detects the battery has reached the low level threshold.

window.addEventListener("batterylow", yourCallbackFunction, false);

Details

This event that fires when a Cordova application detects the percentage of battery has reached the low battery threshold. This value is device specific.

The batterylow handler will be called with an object that contains two properties:

Typically, you will want to attach an event listener with document.addEventListener once you receive the Cordova 'deviceready' event.

Supported Platforms

Quick Example

window.addEventListener("batterylow", onBatteryLow, false);

function onBatteryLow(info) {
    // Handle the battery low event
    alert("Battery Level Low " + info.level + "%"); 
}

Full Example

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

    <script type="text/javascript" charset="utf-8" src="cordova-1.6.1.js"></script>
    <script type="text/javascript" charset="utf-8">

    // Call onDeviceReady when Cordova is loaded.
    //
    // At this point, the document has loaded but cordova-1.6.1.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() {
        window.addEventListener("batterylow", onBatteryLow, false);
    }

    // Handle the batterylow event
    //
    function onBatteryLow(info) {
        alert("Battery Level Low " + info.level + "%"); 
    }

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

batterystatus

This is an event that fires when a Cordova application detects a change in the battery status.

window.addEventListener("batterystatus", yourCallbackFunction, false);

Details

This event that fires when a Cordova application detects the percentage of battery has changed by at least 1 percent. It is also fired if the device has been plugged in or un-plugged.

The battery status handler will be called with an object that contains two properties:

Typically, you will want to attach an event listener with window.addEventListener once you receive the Cordova 'deviceready' event.

Supported Platforms

Windows Phone 7 Quirks

The level property is unavailable as Windows Phone 7 does not provide native APIs for determining battery level. The isPlugged parameter is supported.

Quick Example

window.addEventListener("batterystatus", onBatteryStatus, false);

function onBatteryStatus(info) {
    // Handle the online event
    console.log("Level: " + info.level + " isPlugged: " + info.isPlugged); 
}

Full Example

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

    <script type="text/javascript" charset="utf-8" src="cordova-1.6.1.js"></script>
    <script type="text/javascript" charset="utf-8">

    // Call onDeviceReady when Cordova is loaded.
    //
    // At this point, the document has loaded but cordova-1.6.1.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() {
        window.addEventListener("batterystatus", onBatteryStatus, false);
    }

    // Handle the batterystatus event
    //
    function onBatteryStatus(info) {
        console.log("Level: " + info.level + " isPlugged: " + info.isPlugged); 
    }

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

menubutton

This is an event that fires when the user presses the menu button.

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

Details

If you need to override the default menu button behaviour you can register an event listener for the 'menubutton' event.

Typically, you will want to attach an event listener with document.addEventListener once you receive the Cordova 'deviceready' event.

Supported Platforms

Quick Example

document.addEventListener("menubutton", onMenuKeyDown, false);

function onMenuKeyDown() {
    // Handle the back button
}

Full Example

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"
                      "http://www.w3.org/TR/html4/strict.dtd">
<html>
  <head>
    <title>Cordova Menu Button Example</title>

    <script type="text/javascript" charset="utf-8" src="cordova-1.6.1.js"></script>
    <script type="text/javascript" charset="utf-8">

    // Call onDeviceReady when Cordova is loaded.
    //
    // At this point, the document has loaded but cordova-1.6.1.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() {
        // Register the event listener
        document.addEventListener("menubutton", onMenuKeyDown, false);
    }

    // Handle the menu button
    //
    function onMenuKeyDown() {
    }

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

searchbutton

This is an event that fires when the user presses the search button on Android.

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

Details

If you need to override the default search button behaviour on Android you can register an event listener for the 'searchbutton' event.

Typically, you will want to attach an event listener with document.addEventListener once you receive the Cordova 'deviceready' event.

Supported Platforms

Quick Example

document.addEventListener("searchbutton", onSearchKeyDown, false);

function onSearchKeyDown() {
    // Handle the search button
}

Full Example

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"
                      "http://www.w3.org/TR/html4/strict.dtd">
<html>
  <head>
    <title>Cordova Search Button Example</title>

    <script type="text/javascript" charset="utf-8" src="cordova-1.6.1.js"></script>
    <script type="text/javascript" charset="utf-8">

    // Call onDeviceReady when Cordova is loaded.
    //
    // At this point, the document has loaded but cordova-1.6.1.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() {
        // Register the event listener
        document.addEventListener("searchbutton", onSearchKeyDown, false);
    }

    // Handle the search button
    //
    function onSearchKeyDown() {
    }

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

startcallbutton

This is an event that fires when the user presses the start call button.

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

Details

If you need to override the default start call behaviour you can register an event listener for the 'startcallbutton' event.

Typically, you will want to attach an event listener with document.addEventListener once you receive the Cordova 'deviceready' event.

Supported Platforms

Quick Example

document.addEventListener("startcallbutton", onStartCallKeyDown, false);

function onStartCallKeyDown() {
    // Handle the start call button
}

Full Example

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"
                      "http://www.w3.org/TR/html4/strict.dtd">
<html>
  <head>
    <title>Cordova Start Call Button Example</title>

    <script type="text/javascript" charset="utf-8" src="cordova-1.6.1.js"></script>
    <script type="text/javascript" charset="utf-8">

    // Call onDeviceReady when Cordova is loaded.
    //
    // At this point, the document has loaded but cordova-1.6.1.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() {
        // Register the event listener
        document.addEventListener("startcallbutton", onStartCallKeyDown, false);
    }

    // Handle the start call button
    //
    function onStartCallKeyDown() {
    }

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

endcallbutton

This is an event that fires when the user presses the end call button.

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

Details

If you need to override the default end call behaviour you can register an event listener for the 'endcallbutton' event.

Typically, you will want to attach an event listener with document.addEventListener once you receive the Cordova 'deviceready' event.

Supported Platforms

Quick Example

document.addEventListener("endcallbutton", onEndCallKeyDown, false);

function onEndCallKeyDown() {
    // Handle the end call button
}

Full Example

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"
                      "http://www.w3.org/TR/html4/strict.dtd">
<html>
  <head>
    <title>Cordova End Call Button Example</title>

    <script type="text/javascript" charset="utf-8" src="cordova-1.6.1.js"></script>
    <script type="text/javascript" charset="utf-8">

    // Call onDeviceReady when Cordova is loaded.
    //
    // At this point, the document has loaded but cordova-1.6.1.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() {
        // Register the event listener
        document.addEventListener("endcallbutton", onEndCallKeyDown, false);
    }

    // Handle the end call button
    //
    function onEndCallKeyDown() {
    }

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

volumedownbutton

This is an event that fires when the user presses the volume down button.

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

Details

If you need to override the default volume down behaviour you can register an event listener for the 'volumedownbutton' event.

Typically, you will want to attach an event listener with document.addEventListener once you receive the Cordova 'deviceready' event.

Supported Platforms

Quick Example

document.addEventListener("volumedownbutton", onVolumeDownKeyDown, false);

function onVolumeDownKeyDown() {
    // Handle the volume down button
}

Full Example

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"
                      "http://www.w3.org/TR/html4/strict.dtd">
<html>
  <head>
    <title>Cordova Volume Down Button Example</title>

    <script type="text/javascript" charset="utf-8" src="cordova-1.6.1.js"></script>
    <script type="text/javascript" charset="utf-8">

    // Call onDeviceReady when Cordova is loaded.
    //
    // At this point, the document has loaded but cordova-1.6.1.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() {
        // Register the event listener
        document.addEventListener("volumedownbutton", onVolumeDownKeyDown, false);
    }

    // Handle the volume down button
    //
    function onVolumeDownKeyDown() {
    }

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

volumeupbutton

This is an event that fires when the user presses the volume up button.

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

Details

If you need to override the default volume up behaviour you can register an event listener for the 'volumeupbutton' event.

Typically, you will want to attach an event listener with document.addEventListener once you receive the Cordova 'deviceready' event.

Supported Platforms

Quick Example

document.addEventListener("volumeupbutton", onVolumeUpKeyDown, false);

function onVolumeUpKeyDown() {
    // Handle the volume up button
}

Full Example

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"
                      "http://www.w3.org/TR/html4/strict.dtd">
<html>
  <head>
    <title>Cordova Volume Up Button Example</title>

    <script type="text/javascript" charset="utf-8" src="cordova-1.6.1.js"></script>
    <script type="text/javascript" charset="utf-8">

    // Call onDeviceReady when Cordova is loaded.
    //
    // At this point, the document has loaded but cordova-1.6.1.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() {
        // Register the event listener
        document.addEventListener("volumeupbutton", onVolumeUpKeyDown, false);
    }

    // Handle the volume up button
    //
    function onVolumeUpKeyDown() {
    }

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