CSS two divs next to each other

Question

I want to put two <div>s next to each other. The right <div> is about 200px; and the left <div> must fill up the rest of the screen width? How can I do this?

Answer 1

You can use flexbox to lay out your items:

#parent {
  display: flex;
}
#narrow {
  width: 200px;
  background: lightblue;
  /* Just so it's visible */
}
#wide {
  flex: 1;
  /* Grow to rest of container */
  background: lightgreen;
  /* Just so it's visible */
}

<div id="parent">
  <div id="wide">Wide (rest of width)</div>
  <div id="narrow">Narrow (200px)</div>
</div>

This is basically just scraping the surface of flexbox. Flexbox can do pretty amazing things.

---

For older browser support, you can use CSS float and a width properties to solve it.

#narrow {
  float: right;
  width: 200px;
  background: lightblue;
}
#wide {
  float: left;
  width: calc(100% - 200px);
  background: lightgreen;
}

<div id="parent">
  <div id="wide">Wide (rest of width)</div>
  <div id="narrow">Narrow (200px)</div>
</div>