TypeScript support

[d9k]

I know, probably it's hard to implement.

I had to use https://www.typescriptlang.org/play/ with TS config -> Target -> ESNext to strip types from "options" code and than return types to "composition" code by hand

Update: defineComponent() must be stripped to.

[abdul-alhasany]

It is hard to implement as you have stated. Generally speaking, vue2 and options API were not written using TypeScript so providing support for this feature might have limited use-case. If you have a sample code I can check if this is something feasible.