"Melange: The Next Frontier in Type-Safe Web Development"
summary
Melange compiles OCaml/ReasonML to idiomatic, readable JavaScript and promises near‑seamless interop with npm via PPX bindings, ships a CLI/boilerplate via create-melange-app, and demonstrates full‑stack React where native OCaml SSR outperforms Node runtimes by about 10x faster than Node/Bun. Claims include stronger, sound type safety versus TypeScript and OCaml native code approaching 50% the speed of C. Examples include a working OAuth callback server and concrete binding code that compiles to tidy JS.
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chapters (21)
- 0:00Melange intro and type-safe web
- 1:07What is OCaml and its features
- 4:22ReasonML syntax for OCaml
- 5:26Melange purpose explained
- 7:14JavaScript-compiling languages
- 7:34Speaker's FP journey
- 10:24TypeScript strengths
- 12:10TypeScript unsoundness issues
- 17:40OCaml and ReasonML basics
- 22:55OCaml variants and pattern matching
- 25:02Result and Option error handling
- 28:16OCaml mutability and refs
- 28:57OAuth server in OCaml
- 31:48Hindley-Milner type inference
- 34:41Type inference vs TypeScript
- 35:53Melange JavaScript compilation
- 37:16Binding JS with Melange PPX
- 39:04Binding JS library example
- 41:29Melange tools setup
- 42:53SSR React with OCaml
- 45:04Melange learning resources
