Comment duplication with experimental ternaries
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area:comments
lang:javascript
- Dominant language
- JavaScript
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Description
Prettier 3.1.1
Playground link
--parser babel
--experimental-ternaries
Input:
x = IS_AUTOTEST || (IS_DEV && !IS_TEST)
? [
/*FooBlock*/
]
: []
Output:
x =
IS_AUTOTEST || (IS_DEV && !IS_TEST) ?
/*FooBlock*/
[
/*FooBlock*/
]
: [];
Expected behavior:
Keep the comment in the output array, don't insert a new one above.
Contributor guide
First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Start with the linked Prettier Playground reproduction using the Babel parser and --experimental-ternaries option, then trace how comments are handled when printing this conditional expression. Verify the fix against the supplied JSX input and output, ensuring the existing comment remains only inside the output array.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- javascript
- Domain
- tooling
- Issue type
- Bug
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Stale
- Clarity
- Clearly specified
- Newbie friendliness
- 35/100