Learn CSS Variables by Building a City Skyline - Step 24

Tell us what’s happening:

Hi everyone, so I am not stuck but rather trying to gain an understanding of the concept.

In the bb1 class selector in css we have set a background-color2 variable of " #66cc99"

.bb1 {
width: 10%;
height: 70%;
display: flex;
flex-direction: column;
align-items: center;
–building-color1: #aa80ff;
–building-color2: #66cc99;
}

We then set the background-color of .bb2 using the background-color2 variable

.bb2 {
width: 10%;
height: 50%;
background-color: var(–building-color2, green);
}

The building color 2 variable is never going to work as we have set this in the .bb1 class slector efectively making the requirement for the var(–building-color2) obsolute because we are effectively just writing out in longer terms, background-color: green;

What do you think the reason for this was am I jumping the gun here? Are they just using this as an example to show me the fall-back option?

What are your guys thoughts?

Your code so far

<!-- file: index.html -->
<!DOCTYPE html>
<html lang="en">    
  <head>
    <meta charset="UTF-8">
    <title>City Skyline</title>
    <link href="styles.css" rel="stylesheet" />   
  </head>

  <body>
    <div class="background-buildings">
      <div></div>
      <div></div>
      <div class="bb1">
        <div class="bb1a"></div>
        <div class="bb1b"></div>
        <div class="bb1c"></div>
        <div class="bb1d"></div>
      </div>
      <div class="bb2"></div>
      <div class="bb3"></div>
      <div></div>
      <div class="bb4"></div>
      <div></div>
      <div></div>
    </div>
  </body>
</html>
/* file: styles.css */
* {
  border: 1px solid black;
  box-sizing: border-box;
}

body {
  height: 100vh;
  margin: 0;
  overflow: hidden;
}

.background-buildings {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: flex-end;
  justify-content: space-evenly;
}

/* User Editable Region */

.bb1 {
  width: 10%;
  height: 70%;
  display: flex;
  flex-direction: column;
  align-items: center;
  --building-color1: #aa80ff;
  --building-color2: #66cc99;
}

.bb1a {
  width: 70%;
  height: 10%;
  background-color: var(--building-color1);
}

.bb1b {
  width: 80%;
  height: 10%;
  background-color: var(--building-color1);
}

.bb1c {
  width: 90%;
  height: 10%;
  background-color: var(--building-color1);
}

.bb1d {
  width: 100%;
  height: 70%;
  background-color: var(--building-color1);
}

.bb2 {
  width: 10%;
  height: 50%;
  background-color: var(--building-color2, green);
}

.bb3 {
  width: 10%;
  height: 55%;
}

/* User Editable Region */

.bb4 {
  width: 11%;
  height: 58%;
}

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Challenge Information:

Learn CSS Variables by Building a City Skyline - Step 24

Hello!

It is a bit of practice with the fallback. But, I can assure you that you will make changes in a future step.

I like how they give us lots of practice to help us retain the memory of it.

Wishing you good progress!

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Ok amazing I thought that might be the case thank you very much for your response!

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You are very welcome.

Keep up the good progress.

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