Our wish to Flowtype
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This document summarizes a talk given about Flowtype, a static type checker for JavaScript. The talk discussed how Flowtype allows for strong type inference in React.js projects, checks propTypes statically, and is fast. While Flowtype is not a language itself and just a type checker, its type annotations use a colon instead of TypeScript's angle brackets. The speaker was eager for Flowtype's continued development, as its documentation and support for contributing were still incomplete.
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Our wish to Flowtype
- 1. Our wish to Flowtype @teppeis React.js meetup #2 Sep 8, 2015
- 2. Hello! • Teppei Sato, @teppeis • Cybozu, Inc. / kintone • Closure Compiler / TypeScript / Flowtype
- 3. MUST BUY!
- 12. Flowtype is NOT a language
- 13. Just a type checker (now :)) $ jstransform --strip-types • Just strip types!
- 15. Less original syntax // type cast in Flowtype var strOrNull = (null: ?string); // type cast in TypeScript var strOrNull = <string> null; • Only type annotation with ":" • ECMAScript standard friendly
- 17. Many Facebook repos using Flowtype are published
- 18. Our Facebook made it!
- 20. after
- 22. Why?
- 23. d.ts is not supported yet
- 26. Not friendly with npm
- 36. I wait eagerly Flowtype!
- 37. Thanks!