YYYY-MM-DD Format Not Working

[GoPro16]

Describe the bug
When passing in a parse format of YYYY-MM-DD with an invalid date string of 10/12/2014, should result in and invalid date but instead resolves to 08-14-2015

Expected behavior
Should result in date.isValid() === false

Information

• Day.js Version [e.g. v1.8.11]
• OS: [e.g. MacOS]
• Browser [e.g. chrome 73]

CodeSandbox Link

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IssueHunt Summary

iamkun has been rewarded.

Backers (Total: $50.00)

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Submitted pull Requests

• #517 fix: Add UTC mode with UTC plugin

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With customParseFormat plugin
dayjs('2014-12-01', 'YYYY-MM-DD').toISOString() returns 2014-12-01T00:00:00.000Z

Looks good.

[GoPro16]

@xxyuk Right sorry, I updated my issue comments. If you check the codesandbox it should be throwing an error when trying to parse the invalid date format but instead parses to a random date.

[iamkun]

will fix soon

[IssueHuntBot]

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[iamkun]

🎉 This issue has been resolved in version 1.8.13 🎉

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

Your semantic-release bot 📦🚀

[issuehunt-oss]

@iamkun has rewarded $45.00 to @iamkun. See it on IssueHunt

• 💰 Total deposit: $50.00
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[adil-chbada]

https://day.js.org/docs/en/plugin/custom-parse-format#docsNav