Can I call a TypeScript function from gatsby-node.js file?

[hhimanshu]

My gatsby-node.js file is becoming huge, so I am abstracting it out in different files. However, I would like to use Typescript for the helper files.

I tried 2 things

1. First, I created a function inside a Javascript file (helper.js) and called it from gatsby-node.js file. It worked fine.
2. Then, I renamed the file extension to helper.ts, but I see failures in gatsby develop command

Error: Cannot find module './src/generators/usda/helper.ts'
  Require stack:
  - /Users/hhimanshu/code/prsnl/ts/forkfacts/gatsby-node.js
  - /Users/hhimanshu/code/prsnl/ts/forkfacts/node_modules/gatsby/dist/bootstrap/resolve-module-exports.js
  - /Users/hhimanshu/code/prsnl/ts/forkfacts/node_modules/gatsby/dist/bootstrap/load-plugins/validate.js
  - /Users/hhimanshu/code/prsnl/ts/forkfacts/node_modules/gatsby/dist/bootstrap/load-plugins/load.js
  - /Users/hhimanshu/code/prsnl/ts/forkfacts/node_modules/gatsby/dist/bootstrap/load-plugins/index.js
  - /Users/hhimanshu/code/prsnl/ts/forkfacts/node_modules/gatsby/dist/bootstrap/load-config-and-plugins.js
  - /Users/hhimanshu/code/prsnl/ts/forkfacts/node_modules/gatsby/dist/services/initialize.js
  - /Users/hhimanshu/code/prsnl/ts/forkfacts/node_modules/gatsby/dist/services/index.js
  - /Users/hhimanshu/code/prsnl/ts/forkfacts/node_modules/gatsby/dist/state-machines/develop/services.js
  - /Users/hhimanshu/code/prsnl/ts/forkfacts/node_modules/gatsby/dist/state-machines/develop/index.js
  - /Users/hhimanshu/code/prsnl/ts/forkfacts/node_modules/gatsby/dist/commands/develop-process.js
  - /Users/hhimanshu/code/prsnl/ts/forkfacts/.cache/tmp-18033-PnVyC3Y4PhuY

  - loader.js:889 Function.Module._resolveFilename
    internal/modules/cjs/loader.js:889:15

  - loader.js:745 Function.Module._load
    internal/modules/cjs/loader.js:745:27

  - loader.js:961 Module.require
    internal/modules/cjs/loader.js:961:19

  - v8-compile-cache.js:159 require
    [forkfacts]/[v8-compile-cache]/v8-compile-cache.js:159:20

  - gatsby-node.js:7 Object.<anonymous>
    /Users/hhimanshu/code/prsnl/ts/forkfacts/gatsby-node.js:7:55

  - v8-compile-cache.js:192 Module._compile
    [forkfacts]/[v8-compile-cache]/v8-compile-cache.js:192:30

  - loader.js:1101 Object.Module._extensions..js
    internal/modules/cjs/loader.js:1101:10

  - loader.js:937 Module.load
    internal/modules/cjs/loader.js:937:32

  - loader.js:778 Function.Module._load
    internal/modules/cjs/loader.js:778:12

  - loader.js:961 Module.require
    internal/modules/cjs/loader.js:961:19

  - v8-compile-cache.js:159 require
    [forkfacts]/[v8-compile-cache]/v8-compile-cache.js:159:20

  - resolve-module-exports.ts:197 resolveModuleExports
    [forkfacts]/[gatsby]/src/bootstrap/resolve-module-exports.ts:197:26

  - validate.ts:349 forEach
    [forkfacts]/[gatsby]/src/bootstrap/load-plugins/validate.ts:349:31

Is it possible to leverage TypeScript to write functions and call them from gatsby-node.js?

Thanks

[LekoArts]

Please go to #34613 and you can use TypeScript with Gatsby. By the time you're reading this it's also possible that the feature already was shipped in Gatsby 4. If that is the case the RFC will be marked as done.