Function-first means that we separate each file into the folder they belong to by their usage. For example in a modern frontend project we might have the following folders:
/components: Dumb components who only have presentational purposes/containers: Smart components who fetch data and have the logic to parse or modify it before sending it into the dumb components:/store: Contains all the store files like actions, reducers, selectors, etc.
This might be troublesome when having a large application. For example you might see yourself adding a lot of containers for each page and then having problems finding the file you want inside the containers folder. A common approach to solve this is put every container file inside a folder with the feature name, but then we are using feature-first.
