undefined usePost variable won't get set correctly in object.OutQueueManager

[chrissherlock]

In the function object.OutQueueManager (src/js/out_queue.js) there is the following line:

usePost = usePost && window.XMLHttpRequest && ('withCredentials' in new XMLHttpRequest());

If usePost is set to true or false, then you get the desired outcome. Not so if for some reason usePost is undefined. Then you just get undefined.

At least give a warning that it's undefined perhaps?

[BenFradet]

A undefined check first would make sense indeed, feel free to open a pull request 👍

[chrissherlock]

Pull request submitted. I just emit a Console.warn(), hopefully this is sufficient for any dev that might be debugging...

[chrissherlock]

Hmmmm... we can't use Console.warn()?

[chrissherlock]

Sorry about before, try this patch.

[snowplowcla]

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[snowplowcla]

Chris Sherlock (@chrissherlock) has signed the Individual Contributor License Agreement. Thanks so much

[paulboocock]

See note on #615