I've been using the regular expression shown below to validate certain text:
^\d+(?:fs|sf)[-+]\d+[hmd]$/
Here are some sample texts I have validated with this regular expression:
So far, it's been working well. However, I want to be able to enter only the first number (like 20, 10, or 3 as in the samples) and still have it validate. If I include additional numbers, then the entire text should be validated.
If anyone has a solution to this issue, please help me out.
To create an optional part in the string that starts with either plus or minus, you can utilize the ? character in the regular expression pattern:
^\d+(?:fs|sf)(?:[-+]\d+[hmd])?$
Unclear on what you're asking for, but does this meet your needs:
^\d+(?:(?:fs|sf)[-+]\d+[hmd])?$/
This regex pattern matches numbers or the scenarios you mentioned.
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