Call a JavaScript function from Flex App.Using ExternalInterface API

Here to do this we have to use the ExternalInterface API.

call() Method of this Class will help doing this.

<mx:Application xmlns:mx=”http://www.adobe.com/2006/mxml” layout=”absolute” creationComplete=”init()”>

<mx:Script>
<![CDATA[
private function init():void
{
ExternalInterface.call("alertfromJS");
}
]]>
</mx:Script>

</mx:Application>

Here in the above code we are calling a function in the Javascript of the html page.on initilizing of the App.

The function is alertfromJS which we have to define at the Html page and in the JS block.

And that would be:-

<script language=”JavaScript” type=”text/javascript”>
function alertfromJS()
{
alert(“kumar Gandhi”);
}

</script>

So now when u run the App , a alert box from Javascript will appear with text KumarGandhi.

A good programmer will always have an eye on the html wrapper generated by the Flex App.