[isValid] function not works properly.

[heuhiu]

Describe the bug How the hell on earth with any string + one random number at the end with space -> the .isValid() is still return true dayjs(what_ever_string_you_input 999).isValid()) -> true ?

Expected behavior It should return false instead.

Information

• Day.js Version in "Antd": "^5.9.1", -> maybe need check with Antd
• OS: window
• Browser: Edge Version 119.0.2151.44 (Official build) (64-bit)
• Time zone: GMT+7

[ljgaro]

This! It makes no sense. The same happens with the native JS Date object.

[Dharmang92]

Facing same issue. Any update?

[Dharmang92]

This works properly in date-fns: https://github.com/date-fns/date-fns/tree/main/src/isValid