To update the value of a cookie, assign a new value to the same cookie name:

document.cookie = 'name=Flavio2'

To update the expiration date, assign a new value that includes a new expires or max-age value:

document.cookie = 'name=Flavio; max-age=31536000' // expires in 1 year

Include any other parameters you used when first setting the cookie, such as path or domain.

Lessons in this unit:

0:	Introduction
1:	Setting cookies
2:	Setting a cookie expiration date
3:	Setting a cookie path
4:	Setting a cookie domain
5:	Cookies security
6:	▶︎ Updating a cookie
7:	Deleting a cookie
8:	Accessing the value of a cookie
9:	Checking if a cookie exists
10:	Inspecting cookies
11:	Cookie not being set in Safari