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https://github.com/airbnb/ts-migrate

A tool to help migrate JavaScript code quickly and conveniently to TypeScript
https://github.com/airbnb/ts-migrate

codemod javascript migration typescript

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A tool to help migrate JavaScript code quickly and conveniently to TypeScript

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# ts-migrate



*ts-migrate* is a tool for helping migrate code to TypeScript.

It takes a JavaScript, or a partial TypeScript, project in and gives a compiling TypeScript project out.



*ts-migrate* is intended to accelerate the TypeScript migration process. The resulting code will pass the build, but a followup is required to improve type safety. There will be lots of `// @ts-expect-error`, and `any` that will need to be fixed over time. In general, it is a lot nicer than starting from scratch.



*ts-migrate* is designed as a set of plugins so that it can be pretty customizable for different use-cases. Potentially, more plugins can be added for addressing things like improvements of type quality or libraries-related things (like prop-types in React).



Plugins are combined into migration configs. We currently have two main migration configs:



* for the main JavaScript → TypeScript migration

* for the reignore script



These configs can be moved out of the default script, and people can add custom configs with a different set of plugins for their needs.



You can find instructions on how to install and run ts-migrate in the [main package](./packages/ts-migrate/). If you find any [issues](https://github.com/airbnb/ts-migrate/issues) or have ideas for improvements, we welcome your [contributions](https://github.com/airbnb/ts-migrate/blob/master/CONTRIBUTING.md)!



Check out the [blog post](https://medium.com/airbnb-engineering/ts-migrate-a-tool-for-migrating-to-typescript-at-scale-cd23bfeb5cc) about ts-migrate!



# Published Packages



| Folder | Version | Package |

| ------ | ------- | ------- |

| [packages/ts-migrate](./packages/ts-migrate/) | [![npm version](https://badge.fury.io/js/ts-migrate.svg)](https://badge.fury.io/js/ts-migrate) | [ts-migrate](https://www.npmjs.com/package/ts-migrate) |

| [packages/ts-migrate-plugins](./packages/ts-migrate-plugins/) | [![npm version](https://badge.fury.io/js/ts-migrate-plugins.svg)](https://badge.fury.io/js/ts-migrate-plugins) | [ts-migrate-plugins](https://www.npmjs.com/package/ts-migrate-plugins) |

| [packages/ts-migrate-server](./packages/ts-migrate-server/) | [![npm version](https://badge.fury.io/js/ts-migrate-server.svg)](https://badge.fury.io/js/ts-migrate-server) | [ts-migrate-server](https://www.npmjs.com/package/ts-migrate-server) |



# Unpublished Packages



| Folder | Description |

| ------ | -----------|

| [packages/ts-migrate-example](./packages/ts-migrate-example/) | basic example of usage of the ts-migrate-server with a writing a custom simple plugin |



# Authors



  

    

      

        

        


        Brie Bunge

      

      

        

        


        Sergii Rudenko

      

      

        

        


        John Haytko

      

      

        

        


        Elliot Sachs

      

      

        

        


        Joe Lencioni

     

  



# License



MIT, see [LICENSE](https://github.com/airbnb/ts-migrate/blob/master/LICENCE) for details.