javascript Reg Exp to match specific domain name

Question

I have been trying to make a Reg Exp to match the URL with specific domain name.

So if i want to check if this url is from example.com what reg exp should be the bes

Answer 1

Not sure if this would work for your case, but it would probably be better to rely on the built in URL parser vs. using a regex.

var url  = document.createElement('a');
url.href = "http://www.example.com/thing";

You can then call those values using the given to you by the API

url.protocol // (http:)
url.host     // (www.example.com)
url.pathname // (/thing)

If that doesn't help you, something like this could work, but is likely too brittle:

var url     = "http://www.example.com/thing";
var matches = url.match(/:\/\/(.[^\/]+)(.*)/);

// matches would return something like
// ["://example.com/thing", "example.com", "/thing"]

These posts could also help:

https://stackoverflow.com/a/3213643/4954530

https://stackoverflow.com/a/6168370

Good luck out there!