There are still 100s of thousands of Magento 1 sites still around that would be using Prototype for core functions. Always fun trying to get the two to play nic

There are still 100s of thousands of Magento 1 sites still around that would be using Prototype for core functions. Always fun trying to get the two to play nicely together. I remember having to work with MooTools occasionally as well before jQuery completely took over.