Given that there is a global javascript variable on my web page named myVar, how can I access the value of the variable myVar from within my flash movie using javascript?
I see plenty of examples of using external interface in order to execute javascript from actionscript, but I am unable to find examples of returning values back into the flash movie using actionscript.
Thanks in advance. I hope my question is clear enough.
ExternalInterface works by allowing JavaScript to invoke an ActionScript function in the movie, and vice-versa. You can optionally receive a return value back from the invoked function. Here's a very simple example:
JavaScript:
<script language="JavaScript">
function getMyVar()
{
return myVar;
}
</script>
Flash/AS:
import flash.external.ExternalInterface;
var result:string = ExternalInterface.call("getMyVar");
You can also provide an anonymous function that returns your global variable value to the ExternalInterface.call method as follow:
ExternalInterface.call("function(){ return myGlobalVariable; }");
I've noticed Rex M's answer is a bit incomplete.
He was right about using...
import flash.external.ExternalInterface;
var result:string = ExternalInterface.call("getMyVar");
Then in your javascript you can use
<script language="JavaScript">
function getMyVar() {
return myVar;
}
</script>
However in order to use this, the flash movie must be in an html accessed over http. Not using file://
Here is a tutorial for communicating from actionscript to javascript and vice versa. http://www.youtube.com/watch?v=_1a6CPPG-Og&feature=plcp
You can also do this:
ExternalInterface.call("eval","getVar=function(obj){return obj}");
var yourVar:String = ExternalInterface.call("eval","getVar(JSvar)");
