It should be possible to specify the types for a template only component

[akatz]

Which package(s) does this enhancement pertain to?

• [ ] @types/ember
• [ ] @types/ember__string
• [ ] @types/ember__polyfills
• [ ] @types/ember__object
• [ ] @types/ember__utils
• [ ] @types/ember__array
• [ ] @types/ember__engine
• [ ] @types/ember__debug
• [ ] @types/ember__runloop
• [ ] @types/ember__error
• [ ] @types/ember__controller
• [x] @types/ember__component
• [ ] @types/ember__routing
• [ ] @types/ember__application
• [ ] @types/ember__test
• [ ] @types/ember__test-helpers
• [ ] @types/ember__service
• [ ] @types/ember-data
• [ ] @types/rsvp
• [ ] Other
• [ ] I don't know

As an app or addon developer I want to be able to specify the args for a template only component that could potentially be used at the call site to statically validate the type of the props being passed in.

[chriskrycho]

Thanks for filing this! You can technically do this today by creating a .ts file which imports the corresponding template and then exports it again with the templateOnly wrapper. However, it's very much non-ergonomic! Additionally, it of course doesn't have any impact on actual type-checking… as nothing does yet. This is a key part of the design space we're exploring for template imports and for our still-in-private-alpha-because-very-much-not-fully-ready language server integration.

[chriskrycho]

Follow-on to the above: we specifically need to make it possible to set the "type" of a templateOnly component!

[chriskrycho]

This is now done, via the combination of Ember's own templateOnlyComponent() API and the design of Ember's Signature types. 🎉