I just completed development of a new course about Lightning component development for Pluralsight, which I will be telling you more about soon. But, in the meantime, I wanted to blog about a very annoying bug that I ran into several times as I was developing the course that I thought you should be aware of.
The issue involves seeing Access Check Failed warning messages all over the console log in your browser tools. They indicate that there is a problem with components you have no control of (such as any of the ui controls, like ui:inputText, etc). For example, this is one such error I saw:
WARNING: Access Check Failed! Component.getEvent():’change’ of component ‘markup://ui:inputSelect {38:2;a} {Type}’ is not visible to ‘markup://c:RaceTrackerApp {1:2;a}’.
I did extensive research on this issue and did get a confirmation from the guy at Salesforce in charge of this area that this is likely a bug they have already identified, but not yet resolved (see the comments at the bottom of this post).
This error can be ignored, BUT you do not want to ignore all Access check failed messages because some are indeed valid. For example, any that involve components you do have control over. For these, you want to use an access attribute for your component, attribute or event. You can find more info about that here.
Hope this helps someone.
saramorgan.net 