---
id: bad87fee1348bd9acde08712
title: Use Responsive Design with Bootstrap Fluid Containers
challengeType: 0
forumTopicId: 18362
dashedName: use-responsive-design-with-bootstrap-fluid-containers
---

# --description--

In the HTML5 and CSS section of freeCodeCamp we built a Cat Photo App. Now let's go back to it. This time, we'll style it using the popular Bootstrap responsive CSS framework.

Bootstrap will figure out how wide your screen is and respond by resizing your HTML elements - hence the name <dfn>responsive design</dfn>.

With responsive design, there is no need to design a mobile version of your website. It will look good on devices with screens of any width.

You can add Bootstrap to any app by adding the following code to the top of your HTML:

```html
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" integrity="sha384-BVYiiSIFeK1dGmJRAkycuHAHRg32OmUcww7on3RYdg4Va+PmSTsz/K68vbdEjh4u" crossorigin="anonymous"/>
```

In this case, we've already added it for you to this page behind the scenes. Note that using either `>` or `/>` to close the `link` tag is acceptable.

To get started, we should nest all of our HTML (except the `link` tag and the `style` element) in a `div` element with the class `container-fluid`.

# --hints--

Your `div` element should have the class `container-fluid`.

```js
assert.isTrue(document.querySelector('div')?.classList?.contains('container-fluid'));
```

Your `div` element should have a closing tag.

```js
assert.match(code,/<\/div>/g);
assert.match(code,/<div/g);
assert.equal(code.match(/<\/div>/g).length ,code.match(/<div/g).length);
```

All HTML elements after the closing `style` tag should be nested in `.container-fluid`.

```js
const fluidContainer = document.querySelector('.container-fluid');
const possibleStyleElements = fluidContainer?.querySelectorAll(`:scope ${'style'}`);
const possibleLinkElements = fluidContainer?.querySelectorAll(`:scope ${'link'}`);

assert.lengthOf(fluidContainer?.children,8);
assert.isEmpty(possibleStyleElements);
assert.isEmpty(possibleLinkElements);
```

# --seed--

## --seed-contents--

```html
<link href="https://fonts.googleapis.com/css?family=Lobster" rel="stylesheet" type="text/css">
<style>
  .red-text {
    color: red;
  }

  h2 {
    font-family: Lobster, Monospace;
  }

  p {
    font-size: 16px;
    font-family: Monospace;
  }

  .thick-green-border {
    border-color: green;
    border-width: 10px;
    border-style: solid;
    border-radius: 50%;
  }

  .smaller-image {
    width: 100px;
  }
</style>

<h2 class="red-text">CatPhotoApp</h2>

<p>Click here for <a href="#">cat photos</a>.</p>

<a href="#"><img class="smaller-image thick-green-border" src="https://cdn.freecodecamp.org/curriculum/cat-photo-app/relaxing-cat.jpg" alt="A cute orange cat lying on its back."></a>

<p>Things cats love:</p>
<ul>
  <li>catnip</li>
  <li>laser pointers</li>
  <li>lasagna</li>
</ul>
<p>Top 3 things cats hate:</p>
<ol>
  <li>flea treatment</li>
  <li>thunder</li>
  <li>other cats</li>
</ol>
<form action="https://freecatphotoapp.com/submit-cat-photo">
  <label><input type="radio" name="indoor-outdoor"> Indoor</label>
  <label><input type="radio" name="indoor-outdoor"> Outdoor</label>
  <label><input type="checkbox" name="personality"> Loving</label>
  <label><input type="checkbox" name="personality"> Lazy</label>
  <label><input type="checkbox" name="personality"> Crazy</label>
  <input type="text" placeholder="cat photo URL" required>
  <button type="submit">Submit</button>
</form>
```

# --solutions--

```html
<link href="https://fonts.googleapis.com/css?family=Lobster" rel="stylesheet" type="text/css">
<style>
  .red-text {
    color: red;
  }

  h2 {
    font-family: Lobster, Monospace;
  }

  p {
    font-size: 16px;
    font-family: Monospace;
  }

  .thick-green-border {
    border-color: green;
    border-width: 10px;
    border-style: solid;
    border-radius: 50%;
  }

  .smaller-image {
    width: 100px;
  }
</style>
<div class="container-fluid">
  <h2 class="red-text">CatPhotoApp</h2>

<p>Click here for <a href="#">cat photos</a>.</p>

<a href="#"><img class="smaller-image thick-green-border" src="https://cdn.freecodecamp.org/curriculum/cat-photo-app/relaxing-cat.jpg" alt="A cute orange cat lying on its back."></a>

<p>Things cats love:</p>
<ul>
  <li>catnip</li>
  <li>laser pointers</li>
  <li>lasagna</li>
</ul>
<p>Top 3 things cats hate:</p>
<ol>
  <li>flea treatment</li>
  <li>thunder</li>
  <li>other cats</li>
</ol>
<form action="https://freecatphotoapp.com/submit-cat-photo">
  <label><input type="radio" name="indoor-outdoor"> Indoor</label>
  <label><input type="radio" name="indoor-outdoor"> Outdoor</label>
  <label><input type="checkbox" name="personality"> Loving</label>
  <label><input type="checkbox" name="personality"> Lazy</label>
  <label><input type="checkbox" name="personality"> Crazy</label>
  <input type="text" placeholder="cat photo URL" required>
  <button type="submit">Submit</button>
</form>
</div>
```
