The future of JS ans You
summary
Tracer is a JavaScript‑to‑JavaScript compiler written in JavaScript that takes proposed Harmony features and emits ES5 that runs in browsers or Node (it has a Node batch mode). It actually rewrites rest parameters into Array.prototype.slice calls and turns async/await‑style code into a generated state machine (CPS) with larger sometimes dead‑code output. Demos compile and run; the compiler is usable for prototyping but has an implicit expiration date once the engine natively implements the features.
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chapters (10)
- 0:00Introduction
- 2:51Harmony
- 7:55What is a compiler
- 9:48Lexing
- 11:05Building a tree
- 12:45Parts of function
- 14:13Transformers
- 16:04Output
- 17:40Callback
- 18:56Promise Pattern
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