Pen Settings

HTML

CSS

CSS Base

Vendor Prefixing

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JavaScript

Babel is required to process package imports. If you need a different preprocessor remove all packages first.

Add External Scripts/Pens

Any URL's added here will be added as <script>s in order, and run before the JavaScript in the editor. You can use the URL of any other Pen and it will include the JavaScript from that Pen.

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Code Indentation

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HTML

              
                <button class="button">Just Button</button>
<button class="button button--blue">Blue Button</button>
<button class="button button--pink">Pink Button</button>
<button class="button button--pink button--large">Large Pink Button</button>
<button class="button button--blue button--outlined">Blue Outlined Button</button>

<p>Some text to show that variable scope</p>

<div>Hello</div>
              
            
!

CSS

              
                // root scoping is less precise and can cause confusion with common variable names like size
// :root {
//   --bgColor: green;
//   --size: 1rem;
// }


//--bgColor inside of Button is better than --buttonColor in the root
.button {
  // Default Styles
  background: var(--bgColor);
  padding: var(--size);
  line-height: var(--size);
  border: none;
  font-size: var(--size);
  
  // Default Values
  --bgColor: lightgreen;
  --size: 1rem;
  
  // Variances
  &--blue {
    --bgColor: lightblue;
  }
  
  &--pink {
    --bgColor: hotpink;
  }
  
  &--large {
    --size: 1.5rem;
  }
  
  &--outlined {
    outline: 2px solid currentColor;
  }
}

p {
  color: var(--bgColor); // I AM CONFUSION
}

div {
  --color: red;
  color: var(--color);
}

button {
  margin: 1em .5em;
}
              
            
!

JS

              
                
              
            
!
999px

Console