Ignore specific errors from specific files.

[Dari-K]

I think this request is distinct from a few other similar requests because filtering all the errors from a number of files isn't the goal, only specific errors, and also because it would be preferable to ignore these errors in the editor as well.

My specific use-case is turning on strictNullChecks in tsc, which for a large project is just not feasible given the number of errors thrown up. It would be nice to be able to enable strictNullChecks for all new files, while allowing old files to be slowly migrated over time. Ideally this would be done through tsconfig, but the Typescript team have cited various problems with doing this and have decided not to make this possible (related issues: microsoft/TypeScript#8405 microsoft/TypeScript#8855). Using a separate tsconfig for your IDE and for the build you can have the errors show up, but keep your project building, however it's not ideal to have so many errors in the problems pane. It makes it hard to notice actual problems and all of the red in your old files is very distracting when you're not trying to migrate them.

Some method of ignoring errors (not just filtering them from the problems pane, hiding them in the editor as well) would be useful.
Maybe a setting which looks something like:

ignoreDiagnostics: [
    {
        pattern: 'Error to be filtered',
        files: [ './old-folder/*', './old-file.ts']
    } 
]

If the vscode team isn't keen on a change like this, would it be possible for me to extend the built-in Typescript extension to filter out the errors I want to ignore from the tsserver responses? Any advice on how to go about that would be helpful. Cheers.

[cyraid]

I like this, because just using the filters text box to exclude files from files.exclude isn't really enough. Besides, I've noticed it still reports errors from file.exclude "SomeFolder/ThisFolder/" even though it's hidden from the explorer.. Only when you do "SomeFolder/ThisFolder/**" will it hide from both.

[sandy081]

Moving this to Typescript extension as it is the right one to provide such configuration and ignore from generating errors.

[cyraid]

My errors come from a c# project. I have no typescript in my project at all.. Unless you mean that as an internal sense? (a comment to the internal developers)

[mjbvz]

As noted by the OP, this has already been discussed for TypeScript/JavaScript. Right now I don't think it is something we will be investing given that it does add a lot of complexity without bringing significant user value (outside a few specific use cases like the one outlined here). You can use tasks to selectively run more strict checks on a subset of your code

@sandy081 Since I don't think there's anything we plan on doing specifically for TS for this, I'm closing this feature request as out of scope