How To Find Cookies Which Begin With String "word" And Extract Information From String With Char #

I have cookies with values in it, and between values I put # so I can later extract data from cookies. Now I need a way to search for cookies which begin with some word let say 'w

Solution 1:

Two helper functions.

One that decodes the document.cookie string into an object with keys/values:

functiondecodeCookie() {
  var cookieParts = document.cookie.split(";"), 
  cookies = {};

  for (var i = 0; i < cookieParts.length; i++) {
    var name_value = cookieParts[i],
        equals_pos = name_value.indexOf("="),
        name       = unescape( name_value.slice(0, equals_pos) ).trim(),
        value      = unescape( name_value.slice(equals_pos + 1) );

    cookies[":" + name] = value;
  }
  return cookies;
}

one that searches through this object and finds the first value that starts with a certain search word:

functionfindCookieByName(searchWord) {
  var cookies = decodeCookie();

  for (name in cookies) {
    var value = cookies[name];
    if (name.indexOf(":" + searchWord) == 0) {
      return value;
    }
  }
}

So you can do:

varvalue = findCookieByName("word");

if (value) {
  var pieces = value.split("#"); // > array of values
}

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P.S.: I prepend the cookie name with ":" to prevent clashes with built-in properties of objects. For example: You can name your cookie __proto__ but that wouldn't work too well with JavaScript objects. Hence I store all cookie names with a prefix.