How can I change the file type association of an existing file in WebStorm?

Question

I accidentally created a file with no extension and I chose the wrong file type association. Text Document I think. I renamed it to have the .js extension which is what I

Answer 1

I've had this problem in php storm 8.0.3 on OSX.

I was struggling with a single file that had been added as a text file, but I'd typed in the .js extension.

I tried deleting and recreating, renaming and renaming back, deleting .idea altogether. Nothing worked.

I found that PHPStorm had added the entire file name to the list of patterns for a text file.

....
*.txt
myfile.js
... etc

This was obviously overriding all other settings. And futhermore it was in the IDE Config not the project config. So I'm guessing every other project would have suffered the same issue.

Once I knew where to look it was easily fixed.

Navigate to:

PhpStorm > Preferences > Editor > File Types >  Text files

Then find myfile.js in the Registered Patterns panel and delete it. The file should immediately assume it's correct association.