Learn Responsive Web Design by Building a Piano - Step 6

HTML-CSS
1

how to add second class attribute
Your code so far

<!-- file: index.html -->
<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <title>Piano</title>
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
  </head>
  <body>
    <div id="piano">
      <div class="keys">
        <div class="key"></div>
        <div class="key" class="black--key"></div>
        <div class="key"></div>
        <div class="key"></div>
        <div class="key"></div>
        <div class="key"></div>
        <div class="key"></div>
      </div>
    </div>
  </body>
</html>

/* file: styles.css */

Your browser information:

User Agent is: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/106.0.0.0 Safari/537.36

Challenge: Learn Responsive Web Design by Building a Piano - Step 6

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2

As I can never remember if I need to put the classes separated with a comma or a space, I just googled the answer:

To define multiple classes, separate the class names with a space, e.g. <div class="city main">. The element will be styled according to all the classes specified.

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