customParseFormat strict cannot parse 1-2 digit milliseconds

[fretfan]

When using customParseFormat with strict mode enabled cannot parse milliseconds in 1-, 2-digit (S or SS pattern). Results in "Invalid Date".
Only 3-digits are parsed fine.
YYYY-MM-DDTHH:mm:ss.SSS pattern is OK
YYYY-MM-DDTHH:mm:ss.SS and YYYY-MM-DDTHH:mm:ss.S patterns are not OK

See jsfiddle: https://jsfiddle.net/4t5yk0ju/1/

[fretfan]

Is there any progress with this? Is this a bug or am I missing some configuration properties?

[fretfan]

@iamkun can you give any information about this?

[lsorin77]

I am having a similar issue, e.g. dayjs('04:59:00.900 PM', 'h:mm:ss.SSS A', true) returns InvalidDate. Works in moment.

[BePo65]

The problem is that dayjs uses format to identify strict matches when parsing, but 'format' does not have a S or SS format token. Therefore the test for strictness fails.

PR #1914 solves this topic.

[janardhanbobba522]

I'm facing the same issue with the format

Issue while using "S" and "SS" in the format
dayjs().format("YYYY-MM-DD HH:mm.S"); // '2022-10-17 11:37.S',
dayjs().format("YYYY-MM-DD HH:mm.SS"); // '2022-10-17 11:37.SS',

Works fine
dayjs().format("YYYY-MM-DD HH:mm.SSS"); // '2022-10-17 11:37.983'