Extract parameter value from url using regular expressions

Question

This should be very simple (when you know the answer). From this question

I want to give the posted solution a try. My question is:

How to get the parameter value of a given URL using JavaScript regular expressions?

I have:

http://www.youtube.com/watch?v=Ahg6qcgoay4 

I need:

Ahg6qcgoay4 

I tried:

http://www.youtube.com/watch\\?v=(w{11}) 

But: I suck...

Answer 1

You almost had it, just need to escape special regex chars:

regex = /http\:\/\/www\.youtube\.com\/watch\?v=([\w-]{11})/;  url = 'http://www.youtube.com/watch?v=Ahg6qcgoay4'; id = url.match(regex)[1]; // id = 'Ahg6qcgoay4' 

Edit: Fix for regex by soupagain.

Answer 2

Why dont you take the string and split it

Example on the url

var url = "http://www.youtube.com/watch?p=DB852818BF378DAC&v=1q-k-uN73Gk" 

you can do a split as

var params = url.split("?")[1].split("&"); 

You will get array of strings with params as name value pairs with "=" as the delimiter.