Feature Request: Support for Parsing YYYY/MM/DD Date Format in Hermes Engine
Open
Nobody has claimed this yet.
enhancement
- Dominant language
- JavaScript
- Stars
- 11.3k
- Forks
- 865
- Avg merge
- 1h 30m
- Merged PRs (30d)
- 3
Description
Problem
Date.parse('2025/5/15')
output: NaN
Solution
Additional Context
https://github.com/facebook/hermes/issues/136
https://github.com/facebook/hermes/issues/175
https://github.com/facebook/hermes/issues/647
Safari or Chrome support parse YYYY/MM/DD nowadays
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 at the Date.parse('2025/5/15') entry point and compare Hermes behavior with the linked issues and the stated Safari or Chrome behavior. Done means YYYY/MM/DD input such as 2025/5/15 no longer returns NaN and matches the intended parsing semantics.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- javascript
- Domain
- compilers
- Issue type
- Feature
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Stale
- Clarity
- Mostly clear
- Newbie friendliness
- 35/100