How to make a div fill a remaining horizontal space?

Question

I have 2 divs: one in the left side and one in the right side of my page. The one in the left side has fixed width and I want the one of the right side to f

Answer 1

If you are trying to fill remaining space in a flexbox between 2 items, add the following class to a an empty div between the 2 you want to seperate:

.fill {
  // This fills the remaining space, by using flexbox. 
  flex: 1 1 auto;
}