获取cookie的单值javascript

Question

I already have a script that check for the cookies existence, but i need it to get the cookies value so i can use it in a url like this:

var lang = cookievalue;
location.replace(window.location.protocol+"//"+document.domain+"/"+cookievalue+window.location.pathname);

so what would be the easiest way to simply get the value of a cookie through javascript, everything i've looked for seems to involve spliting the value and stuff,w hich is not necesary since theres simply only one value (en,fr,es etc)

Answer 1

function getCookieValue(key) {
  var cookies = document.cookie.split('; ');
  for (var i = 0, parts; (parts = cookies[i] && cookies[i].split('=')); i++) {
    if (decode(parts.shift()) === key) {
      return decode(parts.join('='));
    }
  }
  return null;
}

function decode(s) {
  return decodeURIComponent(s.replace(/\+/g, ' '));
}

Then, to get a value for a cookie named my_cookie_name , you would use getCookieValue('my_cookie_name') .

Also as an alternative , you can use the jquery-cookie plugin. It's very simple to use ( $.cookie('my_cookie_name') ) and lightweight.