0.3.0 • Published 6 years ago
babel-plugin-flow2ts v0.3.0
babel-plugin-flow2ts
Babel plugin to convert Flow code into TypeScript
How to use
$ yarn global add @babel/cli
$ yarn add babel-plugin-flow2ts
# you must use babel@^7.x.x
$ babel --version
7.0.0-beta.44 (@babel/core 7.0.0-beta.44)
$ babel --plugins babel-plugin-flow2ts ${SRC_FLOW_FILE} -o ${DEST_TS_FILE}Implementation status
| Supported? | Syntax | Flow | TypeScript |
|---|---|---|---|
| ❎ | Maybe type | let a:?number | let a: number \| null \| undefined |
| ❎ | Void type | void | void |
| ❎ | Mixed type | mixed | {} |
| ❎ | Function type | (A, B) => C | (a: A, b: B) => C |
| ❎ | Exact type | {\| a: A \|} | { a: A } |
| ❎ | Indexers | { [A]: B } | { [a: A]: B } |
| ❎ | Existential type | Map<*, *> | Map<any, any> |
| ❎ | Opaque types | opaque type A = B | type A = B |
| ❎ | Variance | interface A { +b: B, -c: C } | interface A { readonly b: B, c: C } |
| ❎ | Type parameter bounds | function f<A: string>(a:A){} | function f<A extends string>(a:A){} |
| ❎ | Cast | (a: A) | (a as A) |
| ❎ | type/typeof import | import type A from 'module' | import A from 'module' |
| ❎ | $Keys | $Keys<X> | keyof X |
| ❎ | $Values | $Values<X> | X[keyof X] |
| ❎ | $ReadOnly | $Readonly<X> | Readonly<X> |
| ❎ | $Exact | $Exact<X> | X |
| ❎ | $Diff | $Diff<X, Y> | Pick<X, Exclude<keyof X, keyof Y>> |
| ❎ | $PropertyType | $PropertyType<T, k> | T[k] |
| ❎ | $ElementType | $ElementType<T, k> | T[k] |
- add CLI