dayjs(value, formats, true).isValid() bug
- Dominant language
- JavaScript
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Description
**Describe the bug**
dayjs(value, formats, true).isValid() always returns false
im using is with a post response to convert date to +1 gmt. if(dayjs(value, formats, true).isValid()) then convert
code:
import * as customParseFormat from 'dayjs/plugin/customParseFormat';
dayjs.extend(customParseFormat)
var formats = [
"DD/MM/YYYY :) HH*mm*ss",
"YYYY/MM/DD :) HH*mm*ss.SSS",
"YYYY-MM-DDTHH:mm:ssZ",
"YYYY-MM-DDTHH:mm:ss.SSSZ",
"YYYY-MM-DDTHH:mm:ss.SSS",
"DD MM YYYY HH:mm:ss Z",
"LLLL",
"LLL",
"llll",
"lll",
];
dayjs('2024-03-25T23:00:00.000Z', formats, true).isValid()
the output will be false and I expect it to return true
**Expected behavior**
A clear and concise description of what you expected to happen.
**Information**
- Day.js Version [^1.11.10]
- OS: [Windows]
- Browser [Chrome]
- Time zone: [+1]
Contributor guide
Research direction
Start by reproducing the reported dayjs('2024-03-25T23:00:00.000Z', formats, true).isValid() call with the customParseFormat plugin enabled. Trace the plugin's handling of the supplied format array and strict parsing, then verify that the reported ISO value is accepted while preserving the existing format behavior.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- javascript
- Domain
- web-dev
- Issue type
- Bug
- Difficulty
- 3/5
- Estimated time
- 1-2 days
- Activity status
- Stale
- Clarity
- Clearly specified
- Newbie friendliness
- 35/100