Since recent update errors everywhere

Unfortunately I failed to reproduce the issue using similar code:

Do you have a sample project you can share that reproduces it?

What about something simple that any project can reproduce like this:

or this:

I had a very similar issue that started after the I upgraded WebStorm to Build #WS-241.14494.235.
All unused variable warnings have become problems all of a sudden.

I started seeing high number of problems on right top corner of the file editor along with squiggly red lines under file name.
But when I went to that bottom pane (Problems pane?) that lists errors and warnings, it was all warnings and suggestions only.

- I tried File > Invalidated Caches  (all checked) → it didn't help.
- I tried changing Inspections settings (JavaScript and TypeScript > Unused symbols) to Consideration from Warning → it didn't help.

- I tried shutting down WebStorm, deleting .idea folder for the project completely, and reopening it. → this worked.

What strange is that even if I put the old .idea folder back now, WS won't give me the same errors.

I hope this helps..

I reset all my settings and didn't import old ones… reinstalled my plugins and everything is working as expected now.

Never mind, spoke too soon. After restarting all the errors are back.

However, if I disable this the errors go away:

Yes, as the errors come from the Svelte Language Server, disabling it should help.

Please note that with the server disabled you can miss certain diagnostic messages for warnings and errors.

I have a similar problem with a React TypeScript project. I'm using a default `eslint.config.js` file provided by Vite. IntelliJ is marking every unused variable with a red underline. 

When I add the suggested rule as a warning:

"rules": {
  ...
  '@typescript-eslint/no-unused-vars': ['warn'],
}

I get additional highlight instead:

Having this rule  and additional `eslint-disable-next-line` rule is applied to the highlight:

I went through the Inspection settings and it seems TSLint is disabled, and every rule I see in “JavaScript and TypeScript” inspection is marked as warning

EDIT:

The // @ts-ignore annotation disables these warnings, but also legitimate errors, like unknown type:

TS6133 is a Typescript compiler error; you probably have

"noUnusedLocals": true

specified in your tsconfig.json. Just turn it off during development.

Elena Pogorelova 

That helped. Thanks!