Welcome to the Treehouse Community

Want to collaborate on code errors? Have bugs you need feedback on? Looking for an extra set of eyes on your latest project? Get support with fellow developers, designers, and programmers of all backgrounds and skill levels here with the Treehouse Community! While you're at it, check out some resources Treehouse students have shared here.

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and join thousands of Treehouse students and alumni in the community today.

Start your free trial

CSS CSS Basics (2014) Basic Selectors ID and Class Selectors

Posted by Muneeb Farrukh
Muneeb Farrukh
9,216 Points

id selector

id selector

index.html 
<!DOCTYPE html>
<html>
  <head>
    <title>Lake Tahoe</title>
    <link rel="stylesheet" href="page.css">
    <link rel="stylesheet" href="style.css">
  </head>
  <body> 
    <header class = main-header>
      <span>Journey through the Sierra Nevada Mountains</span>
      <h1 class = main-heading>Lake Tahoe, California</h1>
    </header>
    <p>
      Lake Tahoe is one of the most breathtaking attractions located in California. It's home to a number of ski resorts, summer outdoor recreation, and tourist attractions. Snow and skiing are a significant part of the area's reputation.
    </p>
    <a href="#">Find out more</a>
    <div id=main-content>
      <h2>Check out all the Wildlife</h2>
      <p>
        As spawning season approaches, the fish acquire a humpback and protuberant jaw. After spawning, they die and their carcasses provide a feast for gatherings of mink, bears, and Bald eagles.
      </p>
      <a href="#">See the Wildlife</a>
    </div>
  </body>
</html>
style.css 
/* Complete the challenge by writing CSS below */
.main-header {
background-color: orange;
}

.main-heading {
font-size: 72px;
}

div {
background-color: lightsteelblue;
}

2 Answers

Nicholas Grenwalt
Nicholas Grenwalt
46,626 Points
Nicholas Grenwalt
Nicholas Grenwalt
46,626 Points

For ID selectors in your HTML where you have 'class=' it should be 'id=' and then instead of the '.' for your CSS selectors you will need '#' in front of them.

Daniel Gauthier
Daniel Gauthier
15,000 Points
Daniel Gauthier
Daniel Gauthier
15,000 Points

Hey Muneeb,

Replace:

div {
background-color: lightsteelblue;
}

With:

#main-content {
 background-color: lightsteelblue; 
}

Remember that you target classes with the . operator, and ids with the # operator.

Also, it won't make a huge deal, but you may want to consider encasing your attributes with quotes. It's not necessary and your code will work without them, but it's very standard in web development to use them.

Good luck!