Wikipedia API + Cross-origin requests

I had the same problem while working on a freeCodeCamp project and the solution was so simple it made me laugh, since I had spent hours searching for it. In your jQuery URL include the parameter below.

&origin=*

Working CodePen

$.getJSON(
  'https://en.wikipedia.org/w/api.php?action=query&format=json&gsrlimit=15&generator=search' +
  '&origin=*' + // <-- this is the magic ingredient!
  '&gsrsearch="q, function(data){ /* ... */ }
);