After a while decided to post some more problem solutions. The first problem this year is about looking for a node in a DOM tree: given two identical DOM tree structures, A and B, and a node from A, find the corresponding node in B.
In this post I will describe the way how I have solved a tricky problem to broadcast deferred messages to unknown iframes from parent window on the same domain using localStorage.,
How to implement the layout that utilizes both flexbox and relative sizing. Incredibly useful for displaying a cascade grid within a flexbox element.