I’m just doing the local weather challenge. It suggests using the Dark Sky API, but the Dark Sky API page clearly states:
And doing it solely on CodePen means that is exactly what is going to be done. As it was when I looked at another challenge in review. This does not seem at all appropriate, when expressly not allowed by Dark Sky, yet it seems to be what is recommended by the challenge, and indeed is what people are having to do without any back-end coding experience to put it on a server (it being a front-end challenge).
For my challenge I am setting up a PHP script on my site to handle the API call, but I wanted to raise this issue.