I am not a javascript guru, but try to use js-cookie.
I included the script: https://github.com/js-cookie/js-cookie: I downloaded it (LINK), and put it in my own js file on the server.
I then include it in a test file and read some cookie, but it keeps showing me the error Cookies is not defined in the browser console. What am I doing wrong :( ?
Code:
<html><head>
<script type=javascript src=https://server/cookies.js></script>
<script>
console.log(ALL COOKIES: + Cookies.get());
</script></head>
<body></body>