Anyone know the most common js fetch failed reason and how to fix it?

Yo! CORS is a pain, but another js fetch failed reason could be preflight requests. If your fetch uses non-simple headers or methods, the browser sends a preflight request first.

Check if your server supports OPTIONS requests. If not, it’ll fail.

Also, try using `mode: 'cors'` in your fetch options. It forces the browser to handle CORS properly.

For debugging, the Chrome DevTools network tab is your best friend.