Yes, it will be held in Poland, about jsfiddle I didn’t know.
Besides that, I see that developers kinda likes it, but there’s almost no jobs for Vue.js devs — React & Angular rules in Poland, then there’s some Ember ones etc.
I’m actively looking for Vue-dedicated job right now at Poznań/remote — no success. Even if I would be not interested I haven’t found any Vue.js-related offers in other cities in Poland.
So maybe it is popular among developers, but not employers — I hold big hopes that this will change after conference in Wrocław :)