The following variables set up the below example:
var COOKIE_NAME = "Example Cookie"; /* The cookie's name. */
var COOKIE_VALUE = "Hello, world!"; /* The cookie's value. */
var COOKIE_PATH = "/foo/bar"; /* The cookie's path. */
var COOKIE_EXPIRES; /* The cookie's expiration date (config'd below). */
/* Set the cookie expiration to 1 minute in future (60000ms = 1 minute). */
COOKIE_EXPIRES = (new Date(Date.now() + 60000)).toUTCString();
document.cookie +=
COOKIE_NAME + "=" + COOKIE_VALUE
+ "; expires=" + COOKIE_EXPIRES
+ "; path=" + COOKIE_PATH;