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HTML

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HTML preprocessors can make writing HTML more powerful or convenient. For instance, Markdown is designed to be easier to write and read for text documents and you could write a loop in Pug.

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CSS

About CSS Preprocessors

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

About JavaScript Preprocessors

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

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Babel includes JSX processing.

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Packages

Add Packages

Search for and use JavaScript packages from npm here. By selecting a package, an import statement will be added to the top of the JavaScript editor for this package.

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HTML 

              
                <section>
  <article></article>
  <article></article>
  <article></article>
  <article><img src="https://i.imgur.com/vasnArm.png" alt="A happy red fox laying on its side on the snow" /></article>
  <article></article>
</section>
!

CSS 

              
                /* Center placement & color */
html { display: grid; height: 100%; place-items: center; background-color: #080011; padding: 20px; box-sizing: border-box }

section {
  max-width: 850px;
  margin: auto;
  border: 1px solid rgba(150,150,150,0.2);
  padding: 20px;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  border-radius: 12px;
  gap: 24px;
}
article {
  width: 200px;
  height: 150px;
  background: rgba(100,100,100,0.2);
  border-radius: 12px;
  flex-grow: 1;
  max-width: 280px;
  overflow: hidden;
  /* This will be the exiting transition */
  transition: transform .2s, background .2s, opacity .2s;
}

/* When the container is hovered, visually deprioritize the cards */
section:hover article {
  transform: translateY(6px);
  opacity: .5;
  /* Transition cards down slowly */
  transition: transform 1s, background .2s, opacity .2s;
}
/* Override above for the hovered card to highlight it */
section article:hover {
  background-color: coral;
  transform: translateY(-6px);
  opacity: 1;
  /* Make transition speed for hovered card normal again */
  transition-duration: .2s;
}

/* Hovering the section container will cause 
all the cards to visually deprioritize.
We can prevent this by removing the pointer events
from the section container so that nothing happens when 
hovering over it, but then add back the pointer events 
to the cards themselves so that the container hover only 
activates when hovering a card. */
section {
  /* remove cursor hover actions, 
  can be moved into section class above */
  pointer-events: none;
}
article {
  /* add back cursor hover actions,
  can be moved into article class above */
  pointer-events: all;
}




/* foxo :D */
article img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  opacity: 0;
  transition: opacity .2s;
}
section article:hover img {
  opacity: 1;
}
!

JS
!
999px

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