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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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Adding Classes

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About the <head>

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Insecure Resource

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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-.

We offer two popular choices: Autoprefixer (which processes your CSS server-side) and -prefix-free (which applies prefixes via a script, client-side).

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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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About Packages

Using packages here is powered by Skypack, which makes packages from npm not only available on a CDN, but prepares them for native JavaScript ES6 import usage.

All packages are different, so refer to their docs for how they work.

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HTML 

              
                <section>
  <h3>Primer ejemplo</h3>
<article id="tipo1">  
Ella usó mi cabeza como un revólver e incendio mi conciencia con sus demonios. Me vi llegando tarde, tarde a todo. Después de un baño cerebral estaba listo para ser amado. Pasa el tiempo y ahora creo que el vacío es un lugar normal. Ella uso mi  Cabeza como un revolver. No creerías las cosas que he hecho por ella, cobardemente pero sin vergüenza. Era piedra en el agua seca por dentro, así se siente cuando la verdad es la palabra sometida. Fui tan dócil como un guante y tan sincero como pude.
</article>
  <h3>Segundo ejemplo</h3>
<article id="tipo2">  
Ella usó mi cabeza como un revólver e incendio mi conciencia con sus demonios. Me vi llegando tarde, tarde a todo. Después de un baño cerebral estaba listo para ser amado. Pasa el tiempo y ahora creo que el vacío es un lugar normal. Ella uso mi  Cabeza como un revolver. No creerías las cosas que he hecho por ella, cobardemente pero sin vergüenza. Era piedra en el agua seca por dentro, así se siente cuando la verdad es la palabra sometida. Fui tan dócil como un guante y tan sincero como pude.
</article>
  <h3>Tercer ejemplo</h3>
<article id="tipo3">  
Ella usó mi cabeza como un revólver e incendio mi conciencia con sus demonios. Me vi llegando tarde, tarde a todo. Después de un baño cerebral estaba listo para ser amado. Pasa el tiempo y ahora creo que el vacío es un lugar normal. Ella uso mi  Cabeza como un revolver. No creerías las cosas que he hecho por ella, cobardemente pero sin vergüenza. Era piedra en el agua seca por dentro, así se siente cuando la verdad es la palabra sometida. Fui tan dócil como un guante y tan sincero como pude.
</article>
  <h3>Cuarto ejemplo</h3>
<article id="tipo4">  
Ella usó mi cabeza como un revólver e incendio mi conciencia con sus demonios. Me vi llegando tarde, tarde a todo. Después de un baño cerebral estaba listo para ser amado. Pasa el tiempo y ahora creo que el vacío es un lugar normal. Ella uso mi  Cabeza como un revolver. No creerías las cosas que he hecho por ella, cobardemente pero sin vergüenza. Era piedra en el agua seca por dentro, así se siente cuando la verdad es la palabra sometida. Fui tan dócil como un guante y tan sincero como pude.
</article>
</section>
!

CSS 

              
                section {
  background: #ddd;
  margin: 0 auto;
  padding: 10px 20px;
  width: 600px;
}
article {
  margin: 20px auto 
}
#tipo1 {  
  -webkit-column-count:2;  
  -moz-column-count:2;  
  column-count:2;  
}

#tipo2 {  
  -moz-column-width: 150px;  
  -webkit-column-width: 150px;   
  column-width: 150px;  
}

#tipo3 {
  -webkit-column-width: 150px;
  -moz-column-width: 150px;
	column-width: 150px;
	/*column gap*/
	-webkit-column-gap: 50px;
	-moz-column-gap: 50px;
	column-gap: 50px;
}

#tipo4 {
  -webkit-column-width: 150px;
  -moz-column-width: 150px;
  column-width: 150px;

  -webkit-column-gap: 50px;
  -moz-column-gap: 50px;
  column-gap: 50px;

  -moz-column-rule: 1px dotted #777;
  -webkit-column-rule: 1px dotted #777;
  column-rule: 1px dotted #777;
}
!

JS
!
999px

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