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dayjs("2").format() == '2001-02-01T00:00:00+09:00' ???

See original GitHub issue

Hi guys. First of all, Thank you for creating and managing this wonderful time library module. I think you are really great people!! I hope one day I can help you to manage this module.

Describe the bug Now I’m trying to change my typescript codes’s time library module from moment.js to dayjs. But I got a strange result like below.

console.log(dayjs("2").isValid())        // true
console.log(dayjs("2").format())        // "2001-02-01T00:00:00+09:00"

I expected it to be invalid and dayjs would throw error. But It didn’t at all. I can’t understand how these result came out.

Could anyone please explain me why these result came out?

Information

Day.js Version [1.10.7]
OS: [macOS Big Sur 11.4]
node: [12.22.3]
Time zone: [e.g. GMT-09:00 KST (Korea Standard Time)]

Issue Analytics

State:
Created 2 years ago
Comments:6 (3 by maintainers)

Top GitHub Comments

1reaction

kihyunkimleecommented, Sep 22, 2021

@imwh0im Thanks!

0reactions

imwh0imcommented, Sep 22, 2021

@kihyunkimlee Yes. In addition, the wrong format gives the phrase ‘invalid date’.

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