freeCodeCamp/curriculum/challenges/english/01-responsive-web-design/css-flexbox/use-display-flex-to-position-two-boxes.md

---
id: 587d78ab367417b2b2512af0
title: 'Use display: flex to Position Two Boxes'
challengeType: 0
videoUrl: 'https://scrimba.com/p/pVaDAv/cgz3QS7'
forumTopicId: 301105
dashedName: use-display-flex-to-position-two-boxes
---

# --description--

This section uses alternating challenge styles to show how to use CSS to position elements in a flexible way. First, a challenge will explain theory, then a practical challenge using a simple tweet component will apply the flexbox concept.

Placing the CSS property `display: flex;` on an element allows you to use other flex properties to build a responsive page.

# --instructions--

Add the CSS property `display` to `#box-container` and set its value to `flex`.

# --hints--

`#box-container` should have the `display` property set to a value of `flex`.

```js
assert($('#box-container').css('display') == 'flex');
```

# --seed--

## --seed-contents--

```html
<style>
  #box-container {
    height: 500px;

  }

  #box-1 {
    background-color: dodgerblue;
    width: 50%;
    height: 50%;
  }

  #box-2 {
    background-color: orangered;
    width: 50%;
    height: 50%;
  }
</style>
<div id="box-container">
  <div id="box-1"></div>
  <div id="box-2"></div>
</div>
```

# --solutions--

```html
<style>
  #box-container {
    height: 500px;
    display: flex;
  }

  #box-1 {
    background-color: dodgerblue;
    width: 50%;
    height: 50%;
  }

  #box-2 {
    background-color: orangered;
    width: 50%;
    height: 50%;
  }
</style>
<div id="box-container">
  <div id="box-1"></div>
  <div id="box-2"></div>
</div>
```