ACTIONSCRIPT 3 Developer’s Guide en

ACTIONSCRIPT 3.0 DEVELOPER’S GUIDE
Handling HTML-related events in AIR
function throwError() {
var x = 400 * melbaToast;
}
Click me.
It contains a JavaScript function, throwError(), that references an unknown variable, melbaToast:
var x = 400 * melbaToast;
When a JavaScript operation encounters an illegal operation that is not caught in the JavaScript code with a try/catch
structure, the HTMLLoader object containing the page dispatches an HTMLUncaughtScriptExceptionEvent event.
You can register a handler for this event, as in the following code:
var html:HTMLLoader = new HTMLLoader();
var urlReq:URLRequest = new URLRequest("test.html");
html.load(urlReq);
html.width = container.width;
html.height = container.height;
container.addChild(html);
html.addEventListener(HTMLUncaughtScriptExceptionEvent.UNCAUGHT_SCRIPT_EXCEPTION,
htmlErrorHandler);
function htmlErrorHandler(event:HTMLUncaughtJavaScriptExceptionEvent):void
{
event.preventDefault();
trace("exceptionValue:", event.exceptionValue)
for (var i:int = 0; i < event.stackTrace.length; i++)
{
trace("sourceURL:", event.stackTrace[i].sourceURL);
trace("line:", event.stackTrace[i].line);
trace("function:", event.stackTrace[i].functionName);
}
}
Within JavaScript, you can handle the same event using the window.htmlLoader property:
Last updated 6/6/2012
1019