Question

ExternalInterface.call in Opera (ver. 12.01) doesn’t perform.
I’m using SWFObject.

In my index.php file in head-section:

swfobject.embedSWF("example.swf", "flash", "1", "1", "10.0.0");

JavaScript function in body:

function ready() {
    alert();
}

Code in ActionScript 3:

if (ExternalInterface.available) {
    ExternalInterface.call('ready');
}

In Google Chrome all works fine.
What may cause the problem in Opera?

Even Internet Explorer 7 works properly with this code.

Answer 1

It’s possible that the JavaScript ready method is unavailable when the Flash first attempts to call it. The Adobe documentation recommends polling the JavaScript until you get a result (see the ExternalInterface.as example here).

You could test the theory quickly with something like the following:

if (ExternalInterface.available) {
    // Poll JavaScript.ready method until we get a result
    var interval = setInterval(function() {
        if (ExternalInterface.call('ready')) {
            trace("JavaScript is ready");
            clearInterval(interval);
        }
    }, 50);
}

Also, JavaScript.alert is a fairly intrusive method of debugging. Try using console.log instead:

function ready() {
    console.log("JavaScript.ready method fired");
}