Switch out nullish operator for ternary to allow loading in fastboot

[jkeen]

I love the nullish operator, but unfortunately fastboot errors upon startup with it in there. This PR switches it for the ternary operator.

P.S. Nice addon!

[ijlee2]

Thanks for the feedback! Yeah, the nullish coalescing operator bit me too in a production app that has FastBoot.

I discussed this issue with a few people on Discord, and I think the solution is for the end user of this addon to update their targets.js file.

Can you try the solution at ember-fastboot/ember-cli-fastboot#770 and let me know if that helps? Another reference is ember-fastboot/ember-cli-fastboot#764.

I think what I can do is to update the documentation to add a warning for FastBoot users. Would this be okay with you?

[jkeen]

Ah ha! You're right. I tried googling for this and didn't find it, so yeah -- I think adding something to the readme would be very helpful.

[ijlee2]

Sounds good. I will work on updating the README tonight!