Regex for a specific format ( javascript)

Question

How would I write a regex to validate a particular format

lets say I have version numbers

v1.0   or v2.0

etc , my regex expression just checks for the presence of v or a number or . , how do I do a validation for a particular format in javascript

Versioning takes on many shapes. If you don't know all the permutationsd, the best you could do (in your case) is [vV][.\d]+ — user557597
– user557597, Commented Nov 14, 2013 at 20:10

anubhava · Accepted Answer · 2013-11-14 19:42:41Z

5

You can try this regex:

/^v\d+(\.\d+)+$/i

This will match:

etc.

answered Nov 14, 2013 at 19:42

anubhava

790k67 gold badges603 silver badges671 bronze badges

Sign up to request clarification or add additional context in comments.

3 Comments

This won't match v or V1 or v.5 or This is v-9.0

@sln: Slightly modified regex /^v\d+(\.\d+)*$/i can take care of it I believe.

actually I have a pretty fixed format for the version number and your first regex was perfect , Thank you for your help