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id	title	challengeType	videoUrl	forumTopicId	dashedName
bad87fee1348bd9aedf08805	Use CSS Selectors to Style Elements	0	https://scrimba.com/c/cJKMBT2	18349	use-css-selectors-to-style-elements

--description--

With CSS, there are hundreds of CSS properties that you can use to change the way an element looks on your page.

When you entered <h2 style="color: red;">CatPhotoApp</h2>, you were styling that individual h2 element with inline CSS, which stands for Cascading Style Sheets.

That's one way to specify the style of an element, but there's a better way to apply CSS.

At the top of your code, create a style block like this:

<style>
</style>

Inside that style block, you can create a CSS selector for all h2 elements. For example, if you wanted all h2 elements to be red, you would add a style rule that looks like this:

<style>
  h2 {
    color: red;
  }
</style>

Note that it's important to have both opening and closing curly braces ({ and }) around each element's style rule(s). You also need to make sure that your element's style definition is between the opening and closing style tags. Finally, be sure to add a semicolon to the end of each of your element's style rules.

--instructions--

Delete your h2 element's style attribute, and instead create a CSS style block. Add the necessary CSS to turn all h2 elements blue.

--hints--

The style attribute should be removed from your h2 element.

assert(!$('h2').attr('style'));

You should create a style element.

assert($('style') && $('style').length >= 1);

Your h2 element should be blue.

assert($('h2').css('color') === 'rgb(0, 0, 255)');

Your stylesheet h2 declaration should be valid with a semicolon and closing brace.

assert(code.match(/h2\s*\{\s*color\s*:.*;\s*\}/g));

All your style elements should be valid and have closing tags.

assert(
  code.match(/<\/style>/g) &&
    code.match(/<\/style>/g).length ===
      (
        code.match(
          /<style((\s)*((type|media|scoped|title|disabled)="[^"]*")?(\s)*)*>/g
        ) || []
      ).length
);

--seed--

--seed-contents--

<h2 style="color: red;">CatPhotoApp</h2>
<main>
  <p>Click here to view more <a href="#">cat photos</a>.</p>

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

  <div>
    <p>Things cats love:</p>
    <ul>
      <li>cat nip</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>
  </div>

  <form action="https://freecatphotoapp.com/submit-cat-photo">
    <label><input type="radio" name="indoor-outdoor" checked> Indoor</label>
    <label><input type="radio" name="indoor-outdoor"> Outdoor</label><br>
    <label><input type="checkbox" name="personality" checked> Loving</label>
    <label><input type="checkbox" name="personality"> Lazy</label>
    <label><input type="checkbox" name="personality"> Energetic</label><br>
    <input type="text" placeholder="cat photo URL" required>
    <button type="submit">Submit</button>
  </form>
</main>

--solutions--

<style>
  h2 {
    color: blue;
  }
</style>
<h2>CatPhotoApp</h2>
<main>
  <p>Click here to view more <a href="#">cat photos</a>.</p>

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

  <div>
    <p>Things cats love:</p>
    <ul>
      <li>cat nip</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>
  </div>

  <form action="https://freecatphotoapp.com/submit-cat-photo">
    <label><input type="radio" name="indoor-outdoor" checked> Indoor</label>
    <label><input type="radio" name="indoor-outdoor"> Outdoor</label><br>
    <label><input type="checkbox" name="personality" checked> Loving</label>
    <label><input type="checkbox" name="personality"> Lazy</label>
    <label><input type="checkbox" name="personality"> Energetic</label><br>
    <input type="text" placeholder="cat photo URL" required>
    <button type="submit">Submit</button>
  </form>
</main>

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