How to use the cordova/channel.onDeviceReady function in cordova

if (!window.console) {
    window.console = {
        log: function(){}
    };
}
if (!window.console.warn) {
    window.console.warn = function(msg) {
        this.log("warn: " + msg);
    };
}

// Register pause, resume and deviceready channels as events on document.
channel.onPause = cordova.addDocumentEventHandler('pause');
channel.onResume = cordova.addDocumentEventHandler('resume');
channel.onDeviceReady = cordova.addStickyDocumentEventHandler('deviceready');

// Listen for DOMContentLoaded and notify our channel subscribers.
if (document.readyState == 'complete' || document.readyState == 'interactive') {
    channel.onDOMContentLoaded.fire();
} else {
    document.addEventListener('DOMContentLoaded', function() {
        channel.onDOMContentLoaded.fire();
    }, false);
}

// _nativeReady is global variable that the native side can set
// to signify that the native code is ready. It is a global since
// it may be called before any cordova JS is ready.
if (window._nativeReady) {
    channel.onNativeReady.fire();
}

if (!window.console) {
    window.console = {
        log: function(){}
    };
}
if (!window.console.warn) {
    window.console.warn = function(msg) {
        this.log("warn: " + msg);
    };
}

// Register pause, resume and deviceready channels as events on document.
channel.onPause = cordova.addDocumentEventHandler('pause');
channel.onResume = cordova.addDocumentEventHandler('resume');
channel.onActivated = cordova.addDocumentEventHandler('activated');
channel.onDeviceReady = cordova.addStickyDocumentEventHandler('deviceready');

// Listen for DOMContentLoaded and notify our channel subscribers.
if (document.readyState == 'complete' || document.readyState == 'interactive') {
    channel.onDOMContentLoaded.fire();
} else {
    document.addEventListener('DOMContentLoaded', function() {
        channel.onDOMContentLoaded.fire();
    }, false);
}

// _nativeReady is global variable that the native side can set
// to signify that the native code is ready. It is a global since
// it may be called before any cordova JS is ready.
if (window._nativeReady) {
    channel.onNativeReady.fire();
}

window.setTimeout(function () {
    if (channel.onDeviceReady.state !== 2) {
        console.log('deviceready has not fired after 5 seconds.');
        logUnfiredChannels(platformInitChannelsArray);
        logUnfiredChannels(channel.deviceReadyChannelsArray);
    }
}, 5000);

window.setTimeout(function () {
    if (channel.onDeviceReady.state !== 2) {
        console.log('deviceready has not fired after 5 seconds.');
        logUnfiredChannels(platformInitChannelsArray);
        logUnfiredChannels(channel.deviceReadyChannelsArray);
    }
}, 5000);

window.setTimeout(function() {
    if (channel.onDeviceReady.state != 2) {
        console.log('deviceready has not fired after 5 seconds.');
        logUnfiredChannels(platformInitChannelsArray);
        logUnfiredChannels(channel.deviceReadyChannelsArray);
    }
}, 5000);

window.setTimeout(function() {
    if (channel.onDeviceReady.state != 2) {
        console.log('deviceready has not fired after 5 seconds.');
        logUnfiredChannels(platformInitChannelsArray);
        logUnfiredChannels(channel.deviceReadyChannelsArray);
    }
}, 5000);

window.setTimeout(function() {
    if (channel.onDeviceReady.state != 2) {
        console.log('deviceready has not fired after 5 seconds.');
        logUnfiredChannels(platformInitChannelsArray);
        logUnfiredChannels(channel.deviceReadyChannelsArray);
    }
}, 5000);

window.setTimeout(function() {
    if (channel.onDeviceReady.state != 2) {
        console.log('deviceready has not fired after 5 seconds.');
        logUnfiredChannels(platformInitChannelsArray);
        logUnfiredChannels(channel.deviceReadyChannelsArray);
    }
}, 5000);

window.setTimeout(function() {
    if (channel.onDeviceReady.state != 2) {
        console.log('deviceready has not fired after 5 seconds.');
        logUnfiredChannels(platformInitChannelsArray);
        logUnfiredChannels(channel.deviceReadyChannelsArray);
    }
}, 5000);

window.setTimeout(function () {
    if (channel.onDeviceReady.state !== 2) {
        console.log('deviceready has not fired after 5 seconds.');
        logUnfiredChannels(platformInitChannelsArray);
        logUnfiredChannels(channel.deviceReadyChannelsArray);
    }
}, 5000);