How to read cookies with brackets?

Question

JavaScript

I set cookies like this:

document.cookie = "DELIVERY[CITY]=Москва";
или
document.cookie = "DELIVERY[REGION]=" + suggestion.data.region;

And how then to read them and check that it is not empty to fulfill the condition?
In Google, I did not find options in square brackets.

Answer 1

what's with the square brackets? square brackets - this is part of the key
you have keys:
DELIVERY[CITY]
DELIVERY[REGION]
respectively, for these keys and you need to get the values