JavaScript query string decoder.

QueryStringDecoder.js

/**
 * Simple query string decoder.
 */
var QueryStringDecoder = (function() {
  return {
    decode: function(url) {
      var decoded = {},
          count = 0,
          pairs = url.slice(url.indexOf('?') + 1).split("&"),
          pair;

      for(; count < pairs.length; count++) {
        pair = pairs[count].split("=");
        // Missing "=" returns "null": http://w3.org/TR/2012/WD-url-20120524/#collect-url-parameters
        decoded[pair[0]] = pair[1] || null;
      }

      return decoded;
  }};
})();

This doesn't handle when a query string doesn't have a value, it should then return null.

See: https://github.com/sindresorhus/query-string

@sindresorhus Good catch Sindre! Your solution is great, thanks for sharing.