https://learn.freecodecamp.org/ + Youtube
https://coreskill.github.io/csss/
https://learn.freecodecamp.org/javascript-algorithms-and-data-structures/es6
https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Functions/Arrow_functions
https://reactjs.org/docs/reconciliation.html
Tutoriál: https://nextjs.org/learn/basics/getting-started
Dokumentace: https://nextjs.org/docs
Příklady: https://github.com/zeit/next.js/tree/canary/examples