Rescript and its standard library Belt are great. I have been using BuckleScript/ReasonML/Rescript since 2018. It gives better guarantees than TypeScript and ha

Rescript and its standard library Belt are great. I have been using BuckleScript/ReasonML/Rescript since 2018. It gives better guarantees than TypeScript and has a stronger focus on the functional approach to problems. The only drawback is it has less documentation than TypeScript, and you will likely have to write bindings for JS libraries you want to use.