Hacker News Reader

If you compile your code with TypeScript and set allowJs=true, you’ll get a lot of checking for free with no changes at all to your existing JS code. TS will catch things like dead code, missing return statements, type mismatches and so on for free.

It will be nice if the use case of TS only being used as a static checker be supported better, but then there will be no point in TS as a language

If that's the use case you have, then Facebook's Flow is a better fit.

What kind of additional support do you wish TS had, that it doesn’t have already?

Fortify SCA supports js and typescript. I’ve been writing custom rules for it lately at work and have had great success with it. Expensive but powerful tool.

alternative to typescript would be facebook's flow.js, which works with 'normal' JS code