CODEWITHSUNDEEP
cordovacordova-plugins
Adriano Di Giovanni
Adriano Di Giovanni

Reputation: 1515

Which is the correct way to fire an event from native to javascript with Cordova?

I couldn't find any article/blog/docs explaining how to fire an event from native Android/iOS to javascript with Cordova.

How to implement such async communication?

Upvotes: 3

Views: 1339

Answers (1)

jcesarmobile
jcesarmobile

Reputation: 53301

This is how cordova-plugin-network-information does it

var cordova = require('cordova');
cordova.fireDocumentEvent('offline');

Then you listen for it like this:

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

Statusbar plugin does it like this:

cordova.fireWindowEvent('statusTap');

Then you listen for it like this:

window.addEventListener('statusTap', yourCallbackFunction);

In the native part, it's just a like any other plugin callback, for the statusbar plugin it's like this for iOS

CDVPluginResult* result = [CDVPluginResult resultWithStatus:CDVCommandStatus_OK messageAsDictionary:payload];
    [result setKeepCallbackAsBool:YES];
    [self.commandDelegate sendPluginResult:result callbackId:_eventsCallbackId];

The important part is the setKeepCallbackAsBool set to YES, that's for allowing to call the callback multiple times and the callback is the one firing the event.

Upvotes: 3

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