If you're afraid of vendor lock-in, but fine with comments then you can just put all of your typing information in jsdoc comments. https://github.com/Microsoft

If you're afraid of vendor lock-in, but fine with comments then you can just put all of your typing information in jsdoc comments. https://github.com/Microsoft/TypeScript/wiki/JSDoc-support-in-JavaScript https://github.com/Microsoft/TypeScript/wiki/JSDoc-support-i...