How to conduct A/B testing using cookies?

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gymnast_t342019-01-29 12:29:06

JavaScript

gymnast_t34, 2019-01-29 12:29:06

I'm going to test a new site design. On the front and backend, I checked for cookies. If there is, then the new design, if not, then the old design. I was going to test on 10% of visitors. The problem is that google analytics requires 2 different page addresses (for example, site.ru and site.ru/new), while my options differ only in the presence of cookies. Is it possible for 10% of visitors to simply substitute a js code that will set a cookie and reload the page with a new design?

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Dmitry Belyaev, 2019-01-29
@bingo347

You should have 2 options for cookies, which are set in advance, and the server should keep a count of how many of which cookies you have already issued before. If the user does not have a cookie, then we choose which one to set based on this count. Simply put, you set cookie A for the first visitor, then 9 people receive B.
For google analytics, put utm tags in the url (you can use js through the history API)