parse-hash-bang-arguments-in-javascript.js

/**
 * Parse hash bang parameters from a URL as key value object.
 * 
 * For repeated parameters the last parameter is effective.
 * 
 * If = syntax is not used the value is set to null.
 * 
 * #!x+y:3 -> { x:null, y:3 }
 * 
 * @param options 
 * 
 * @return Object of key -> value mappings.
 */
function parseHashBangArgs(/*Object*/options) {
  options = options || {};
  
  var href = options.href || window.location.href;
  if (!!!(href.indexOf("#!") + 1)) return false;
  
  var vars = {},
    paramDelimiter = options.paramDelimiter || "+",
    valueDelimiter = options.valueDelimiter || ":",
    hashes = href.slice(href.indexOf("#!") + 2).split(paramDelimiter),
    i = hashes.length;

  while (i--) {
    var hash = hashes[i].split(valueDelimiter);
    vars[hash[0]] = (hash.length > 1)
      ? hash[1]
      : null;
  }

  return vars;
};

console.log(parseHashBangArgs());