How can I ensure that a string follows the specific format of x.xx.xxxxx? The first character is mandatory, followed by a period, then two characters, another period, and finally any number of characters of varying lengths.
How can I ensure that a string follows the specific format of x.xx.xxxxx? The first character is mandatory, followed by a period, then two characters, another period, and finally any number of characters of varying lengths.
I experimented with a RegExp pattern /[^.]\.[^.]{2}\.[^.]+/ in the Node console that could be helpful to you.
This pattern calls for a single character that is not a period, followed by a period, then two characters that are not periods, another period, and finally one or more characters that are not periods.
If you want to allow 0 or more non-period characters at the end position, then here is the modified version, ...
/[^.]\.[^.]{2}\.[^.]*/
> pattern = /[^.]\.[^.]{2}\.[^.]+/
/[^.]\.[^.]{2}\.[^.]+/
> pattern.test('a.bc.d')
true
> pattern.test('a.b.d')
false
> pattern.test('a.bc.djfkflkjd483789374')
true
In the context of yup, this documentation shows how you can use a regex for validation... https://github.com/jquense/yup#stringmatchesregex-regex-message-string--function-schema
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