https://github.com/jakejarvis/vercel-esm-import-bug

https://github.com/jakejarvis/vercel-esm-import-bug

Last synced: 19 days ago
JSON representation

• Host: GitHub
• URL: https://github.com/jakejarvis/vercel-esm-import-bug
• Owner: jakejarvis
• Created: 2021-09-01T22:05:38.000Z (about 3 years ago)
• Default Branch: main
• Last Pushed: 2021-09-01T23:20:23.000Z (about 3 years ago)
• Last Synced: 2024-10-04T05:41:17.538Z (about 1 month ago)
• Language: TypeScript
• Homepage: vercel-esm-import-bug.vercel.app
• Size: 1.95 KB
• Stars: 1
• Watchers: 3
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

        
# vercel-esm-import-bug

Importing a pure ESM module like node-fetch ([as of v3.0.0](https://github.com/node-fetch/node-fetch#loading-and-configuring-the-module)) in a TS function causes a runtime error about using `import` instead of `require()` (which [we are...](https://github.com/jakejarvis/vercel-esm-import-bug/blob/main/index.ts#L1)):

https://vercel-esm-import-bug.vercel.app/

```

2021-09-01T23:19:58.908Z	undefined	ERROR	Error [ERR_REQUIRE_ESM]: Must use import to load ES Module: /var/task/node_modules/node-fetch/src/index.js

require() of ES modules is not supported.

require() of /var/task/node_modules/node-fetch/src/index.js from /var/task/index.js is an ES module file as it is a .js file whose nearest parent package.json contains "type": "module" which defines all .js files in that package scope as ES modules.

Instead rename /var/task/node_modules/node-fetch/src/index.js to end in .cjs, change the requiring code to use import(), or remove "type": "module" from /var/task/node_modules/node-fetch/package.json.

    at Object.Module._extensions..js (internal/modules/cjs/loader.js:1089:13)

    at Module.load (internal/modules/cjs/loader.js:937:32)

    at Function.Module._load (internal/modules/cjs/loader.js:778:12)

    at Module.require (internal/modules/cjs/loader.js:961:19)

    at require (internal/modules/cjs/helpers.js:92:18)

    at Object. (/vercel/path0/index.ts:1:1)

    at Module._compile (internal/modules/cjs/loader.js:1072:14)

    at Object.Module._extensions..js (internal/modules/cjs/loader.js:1101:10)

    at Module.load (internal/modules/cjs/loader.js:937:32)

    at Function.Module._load (internal/modules/cjs/loader.js:778:12) {

  code: 'ERR_REQUIRE_ESM'

}

RequestId: 2ce4dae6-d9c1-4f05-a66b-9fa8dee16e2e Error: Runtime exited with error: exit status 1

Runtime.ExitError

```