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Archived:Using the externalInterface class of Flash in WRT

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Archived.pngArchived: This article is archived because it is not considered relevant for third-party developers creating commercial solutions today. If you think this article is still relevant, let us know by adding the template {{ReviewForRemovalFromArchive|user=~~~~|write your reason here}}.

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Code ExampleArticle
Created: Risalmin (15 Sep 2010)
Last edited: hamishwillee (14 May 2013)

This draft document will describe how to use the externalInterface class in Adobe Flash for communicating between a Web Runtime Widget (JavaScript) and a Flash SWF (ActionScript). A good example of such implementation is the On demand Web TV – have your favorite channels with you



Add an id to the Flash object's embed tag:

<param name="canHandleException" value="true" />


ActionScript 2

//required to use the externalinterface class
import flash.external.*;
//Add a function call that can be accessed from javascript
ExternalInterface.addCallback("hello",this, hello);
//and the actual function
function hello(){
//do something

ActionScript 3

//required to use the externalinterface class
import flash.external.*;
//Add a function call that can be accessed from javascript
ExternalInterface.addCallback("hello", hello);
//and the actual function
function hello(){
//do something

Calling the function in Flash from JavaScript

function hello() {

Example implementation

You can download an example FLA and WRT widget from this link

This page was last modified on 14 May 2013, at 06:16.
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