How to get #hash value in a URL in JS

Question

For example, I have a URL as :

http://www.google.com/#hash=value2x

I want a js code to return just value2x. I tried

Answer 1

function getHashValue(key) {
  var matches = location.hash.match(new RegExp(key+'=([^&]*)'));
  return matches ? matches[1] : null;
}

// usage
var hash = getHashValue('hash');