This is a personnal list of conferences I like the most throughout the event. You may have your own preferences but the most part is worth watching for frontend developers.
My take on this event
It was a pretty standard Devfest event. Advanced topics are still missing for this kind of meeting. As I grow up as a developer, I feel the need to go deeper on subjects. Compared to Devoxx, it could be a bit lackluster. Anyway, it was really cool and I liked it.