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[![Coverage Status](https://coveralls.io/repos/github/burnnat/flow-to-dts/badge.svg?branch=master)](https://coveralls.io/github/burnnat/flow-to-dts?branch=master)\n\nConvert [Flow libdefs](https://flow.org/en/docs/libdefs/) to [Typescript declaration files](https://www.typescriptlang.org/docs/handbook/declaration-files/introduction.html).\n\n**This tool is currently pre-alpha.** Contribution of issues, suggesions, and pull requests are welcome!\n\n# Usage\n## Command Line\n```\nflow-to-dts input.flow.js output.d.ts\n```\n\n## Node API\nTransforming a code string:\n```js\nimport { transform } from 'flow-to-dts';\n\nconst input = 'type MyCode';\n\ntransform(input).then((output) =\u003e console.log(output));\n```\n\nTransforming an AST:\n```js\nimport { parse } from '@babel/parser';\nimport { transformAst } from 'flow-to-dts';\n\nconst input = parse('type MyCode');\n\ntransformAst(input).then((output) =\u003e console.log(JSON.stringify(output)));\n```\n\n# Supported Features\n(Note that this is not intended as an exhaustive list, but merely a representative sample indicating some of the key transformations performed by the tool.)\n\n| Feature          | Supported          | Flow                                | Typescript                                        |\n|------------------|--------------------|-------------------------------------|---------------------------------------------------|\n| Flow Header      | :heavy_check_mark: | `// @flow`                          | `// `                                             |\n| Module Exports   | :heavy_check_mark: | `declare module.exports: MyModule;` | `export = MyModule;`                              |\n| Mixed Type       | :heavy_check_mark: | `mixed`                             | `number \\| string \\| boolean \\| symbol \\| object` |\n| Nullable Types   | :heavy_check_mark: | `?string`                           | `string \\| null \\| undefined`                     |\n| Tuple Types      | :heavy_check_mark: | `[number, string]`                  | `[number, string]`                                |\n| Exact Objects    | :heavy_check_mark: | `{\\| name: string \\|}`              | `{ name: string }`                                |\n| Open Objects     | :heavy_check_mark: | `{ name: string }`                  | `{ name: string; [field: string]: any }`          |\n| Class Types      | :heavy_check_mark: | `Class\u003cSomeType\u003e`                   | `typeof SomeType`                                 |\n| Built-in Types   | :heavy_check_mark: | `http$ClientRequest`                | `import { ClientRequest } from \"http\";`           |\n| Key Types        | :x:                | `$Keys\u003cA\u003e`                          |                                                   |\n| Value Types      | :x:                | `$Values\u003cA\u003e`                        |                                                   |\n| Difference Types | :x:                | `$Diff\u003cA\u003e`                          |                                                   |\n| Partial Types    | :heavy_check_mark: | `$Shape\u003cA\u003e`                         | `Partial\u003cA\u003e`                                      |\n| Rest Types       | :x:                | `$Rest\u003cA\u003e`                          |                                                   |\n| Supertypes       | :x:                | `$Supertype\u003cA\u003e`                     |                                                   |\n| Subtypes         | :x:                | `$Subtype\u003cA\u003e`                       |                                                   |\n| Existential Type | :heavy_check_mark: | `*`                                 | `any`                                             |\n\n# Acknowledgements\nSpecial thanks to the creators and maintainers of the following projects that made this tool possible:\n\n- [`astexplorer`](https://astexplorer.net/)\n- [`babel`](https://babeljs.io/)\n- [`babel-handbook`](https://github.com/jamiebuilds/babel-handbook)\n- [`babel-plugin-tester`](https://github.com/babel-utils/babel-plugin-tester)\n- [`flow-cheatsheet`](https://github.com/saltycrane/flow-cheatsheet)\n- [`flow-typed`](https://github.com/flow-typed/flow-typed)\n- [`recast`](https://github.com/benjamn/recast)\n- [`typescript-vs-flowtype`](https://github.com/niieani/typescript-vs-flowtype)\n- [`yargs`](https://yargs.js.org/)\n","project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fburnnat%2Fflow-to-dts","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Fburnnat%2Fflow-to-dts","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fburnnat%2Fflow-to-dts/lists"}