@cureapp/babel-plugin-flow-to-typescript NPM

@cureapp/babel-plugin-flow-to-typescript

Babel plugin to convert Flow code into TypeScript

How to use

$ yarn global add @babel/cli 
$ yarn add @cureapp/babel-plugin-flow-to-typescript

# you must use babel@^7.x.x
$ babel --version 
7.0.0-beta.44 (@babel/core 7.0.0-beta.44)

$ babel --plugins @cureapp/babel-plugin-flow-to-typescript ${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]`
❎	$Shape	`$Shape<T>`	`Partial<T>`
❎	Class	`Class<T>`	`typeof T`