The checkJS option is awesome. I believe a ton of opensource JS projects on the web can benefit from this. Unlike flow which is written in a different language

The checkJS option is awesome. I believe a ton of opensource JS projects on the web can benefit from this. Unlike flow which is written in a different language and has little tooling, typescript can now just act as a type checker, with vscode offer great intellisense and generally play very well with existing build tools. This is just fucking awesome. I see Types as a way of documenting your code for the other team members who will use your API.