import-js / import-js/eslint-plugin-import

Feature request: import/extensions autofix

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enhancement help wanted
Dominant language
JavaScript
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Description

With Node 13.2 and up now having near-stable support for ESM modules, existing projects will need to update their imports in order to make use of it. According to the docs:

A file extension must be provided when using the import keyword. Directory indexes (e.g. './startup/index.js') must also be fully specified. This behavior matches how import behaves in browser environments, assuming a typically configured server.

(https://nodejs.org/api/esm.html#esm_mandatory_file_extensions)

Currently, while the import/extensions plugin can be configured to throw if an import doesn't have a proper ending, it does not provide a way to autofix it. Having that would be a tremendeous benefits to existing, large codebases migrating to native modules.

Contributor guide

Open the contributing guide

First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start with the import/extensions rule and Node's mandatory file extensions documentation linked in the issue. Define how the rule should determine and apply safe fixes, then validate the behavior against its existing tests; done means eligible imports can be autofixed with the required file extensions.

Written by the indexing model from the issue text.

Assessment

Tech stack
eslint, javascript
Domain
tooling
Issue type
Feature
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
45/100

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