Javascript :: How Could The FLEX ExternalInterface.available Check Fail But Still Be Unavailable
Mar 23, 2012
We have several flash objects written in FLEX and being rendered inside a single HTML page.We are using javascript to communicate between the objects and perform other page related operations.
Execution Flow:
In the creationComplete event of the FLEX code of our objects we execute the following (pseudo-ish) code:
if (ExternalInterface.available) {
ExternalInterface.addCallBack("initialize");
ExternalInterface.callMethod("ready");
[code]....
Sometimes the last javascript function outlined is never called. When this happens none of the error alerts appear, the final code is just not executed but everything up to this point has executed successfully.
This happens about 1/100+ times in Chrome/Firefox
This happens about 1/10 times in IE8
This happens about 9/10 times in IE7 (full disclosure - the only machine we have to use for testing this is also much slower)
Since the problem is intermittent and becomes more apparent in slower browsers/machines my suspicion is that it is timing related. If I stop the first flex 'intiailize' call from happening until I click a button in the UI instead of automatically on what is essentially 'creationComplete' everything ALWAYS works.
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