Question

It must have been 15 years since I set a cookie value with javascript …

document.cookie = 'key=value';  //got that ...

How do I append another value with the same key? I want to create a list of values (page=1,34,48,59…) that I can then read and loop over. Or is there a better way?

Answer 1

Specify them all once eg:

var value = ['1', '2', '3', 'n'].join(',');
document.cookie = 'key=' + value;

where 'key=' + value will now be:

key=1,2,3,n

Or alternatively, read your data from cookie first and add new data:

var keycookie = // read your cookie here
keycookie += 'new stuff';
document.cookie = 'key=' + keycookie;