2 divs aligned side by side, how to make right div fill width 100%?

Question

I\'m wondering what the best way to go about doing this is...

I have 3 divs:

• a div#container with width=100%; tha

Answer 1

This can be accomplished using Flex-Box, which has been introduced with CSS3 and according to Can I use is cross-browser.

.container { 
  display: flex; 
}

.left {
  width: 100px; /* or leave it undefined */
}

.right { 
  flex-grow: 1;
}

/* some styling */
.container {height: 90vh}
.left {background: gray}
.right {background: red}

  
100px
  
Rest