JS: Tolerate trailing commas in JSON objects#19393
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asgerf merged 2 commits intogithub:mainfrom Apr 29, 2025
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Pull Request Overview
This PR updates the JSON parser logic so that trailing commas in JSON objects are tolerated rather than triggering an error.
- Removed the check that raised an error for trailing commas in JSON objects.
- Aligns the extractor behavior with updated expectations for JSON object formatting.
Files not reviewed (2)
- javascript/extractor/tests/json/input/object-trailing-comma.json: Language not supported
- javascript/extractor/tests/json/output/trap/object-trailing-comma.json.trap: Language not supported
Comments suppressed due to low confidence (1)
javascript/extractor/src/com/semmle/js/parser/JSONParser.java:154
- It would be helpful to add a comment explaining that trailing commas in JSON objects are intentionally allowed per the updated requirements, to aid future maintainability.
if (!needsComma) {
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Stops the extractor from complaining about trailing commas in JSON objects.
When preparing #19267 I somehow convinced myself that this was already working for JSON objects, but it has the exact same issue.