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HTML

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CSS

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CSS preprocessors help make authoring CSS easier. All of them offer things like variables and mixins to provide convenient abstractions.

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CSS Base

About CSS Base

It's a common practice to apply CSS to a page that styles elements such that they are consistent across all browsers. We offer two of the most popular choices: normalize.css and a reset. Or, choose Neither and nothing will be applied.

Vendor Prefixing

About Vendor Prefixing

To get the best cross-browser support, it is a common practice to apply vendor prefixes to CSS properties and values that require them to work. For instance -webkit- or -moz-.

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JavaScript

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JavaScript preprocessors can help make authoring JavaScript easier and more convenient.

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Babel includes JSX processing.

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Packages

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HTML 

              
                <div class="grid-container">
  <div class="grid-item gi-1">1</div>
</div>
!

CSS 

              
                /* CSS Reset */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  padding: 2%;
}

/* READ THIS:
    
Since we have set box-sizing to "border-box" on all HTML elements (see top of stylesheet), this means that the sum of the inner content, padding, and border will equal the total width and height of the item.

We set the border to 5px on all sides.  This means that the border takes up 10px of space in both the height and width directions.  Therefore, the total "available space" for grid items in this container is 300px in both directions.

310px - (5px + 5px) = 300px

Remember this as we go through the tutorial.
*/
.grid-container {
  width: 310px;
  height: 310px;
  border: 5px solid #212226;
  display: grid;
  grid-template-rows: repeat(8, 30px);
  grid-template-columns: repeat(8, 30px);
}

.gi-1 {
  color: #1E4040;
  background-color: #71D99E;
  grid-row-start: 2;
  grid-row-end: 6;
  grid-column-start: 2;
  grid-column-end: 6;
}

/* 
Basic grid item styles.  By using Flexbox, we can center the numbers in each grid item for aesthetic purposes.

You should be comfortable with these.  If you aren't, please go back and take my basic CSS and Flexbox tutorials.

Basic CSS - https://bit.ly/39TbwrZ 
Flexbox - https://bit.ly/3mcK9Oe 
*/
.grid-item {
  font-size: 2rem;
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
}
!

JS
!
999px

Console