javascript - URL Pattern Matching issue, .+ matches all after -

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i matching stored urls current url , having little bit of issue - regex works fine when being matched against url itself, reason sub-directories match (when want direct match of course).

say user stores www.facebook.com, should match both http://www.facebook.com , https://www.facebook.com , does

the problem is matching sub-directories such https://www.facebook.com/events/upcoming etc.

the regex example: 

/.+:\/\/www\.facebook\.com/

matches following:

https://www.facebook.com/events/upcoming

when should matching 

 http://www.facebook.com/  https://www.facebook.com/

how can fix seemingly broken regex?

if you're being specific want match, why not reflect in regexp?

/^https?:\/\/(?:(?:www|m)\.)?facebook\.com\/?$/

regular expression visualization

  • http or https
  • www., m. or no subdomain
  • facebook.com

demo

edit include optional trailing backslash


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