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JavaScript Regular Expressions in Detail

Special Characters: Matching the URL and Non-Capturing Groups

Explore how to use special characters and non-capturing groups in JavaScript regular expressions to match URLs. Understand breaking down URL components, capturing hostnames, and cleaning captured groups for efficient pattern matching.

We'll cover the following...

Regular expression to match sections of the URL

Finally, we’re looking for anything that comes after the first slash right after your hostname (i.e., after the .com). Again, we’re keeping it simple for now, so matching that should be quite simple. For the breakdown:

/\.com(\/[a-z\.]+)?/g

And for the breakdown:

  • The mandatory .com at the start is clearly escaping the dot at the beginning.
  • The optional condition for the URL is given by the last ? after the capturing group.
  • The only characters we’re allowing for the URL are anything between a to z and the actual
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