The forums ran from 2008-2020 and are now closed and viewable here as an archive.
Home › Forums › CSS › How to display and order a two column post layout with flex or grid › Reply To: How to display and order a two column post layout with flex or grid
Unfortunately, if you are using a flex-column where you need it to wrap, then it must have a defined (or calculable) height so that the column knows when to wrap.
Frontend Masters is the best place to get it. They have courses on all the most important front-end technologies, from React to CSS, from Vue to D3, and beyond with Node.js and Full Stack.