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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-.

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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

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

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HTML 

              
                <ul>
  <li><a href="#textdecoration">Propriedade text-decoration</a></li>
  <li><a href="#textemphasis">Propriedade text-emphasis</a></li>
  <li><a href="#enfeitandolink">Enfeitando link</a></li>
  </ul>

<h1 id='decoration'>Propriedade text-decoration</h1>

<div>
<code>text-decoration: text-decoration-line text-decoration-color text-decoration-style text-decoration-thickness|initial|inherit;
  </code></div>

<div class='wavy'>E se o texto for pequeno.</div>

<p class="solid">O amor é uma flor roxa que nasce no coração do trouxa. Style: solid.</p>


<p class="wavy">Muita calma nessa hora. Style: wavy.</p>


<p class="double">Você deve comer frutas e legumes. Style: double.</p>


<p class="dotted">Um texto com risco dotted (pontilhado), pra variar.</p>

<p class="dashed">Por cima e por baixo. Era dashed, fica dotted se encostar.</p>

<h1 id='textemphasis'>Propriedade text-emphasis</h1>

<div><code>
  text-emphasis: text-emphasis-style text-emphasis-color.
  
  <br/><br/>text-emphasis: none|filled|open|dot|circle|double-circle|triangle|sesame|string|color|initial|inherit;
  
  <br/><br/>
  text-emphasis-position: over|under|left|right|initial|inherit
  
  </div>

<p class="filled">Aqui tem filled open-circle.</p>

<p class="dot">Aqui tem dot.</p>

<p class="opentri">Aqui tem open triangle.</p>

<p class="borboleta">Aqui tem borboleta acima.</p>
  
  <p class="abelha">Aqui tem abelha acima.</p>

<p class="loop">Aqui tem loop abaixo.</p>

<p class="double-circle">Aqui tem open double-circle.</p>

<p class="triangle">Aqui&nbsp;tem&nbsp;triangle.</p>
  
  <p class="triangulo">Emphasis funciona melhor em fonte mono.</p>
  
  <p class="sesame">Aqui tem sesame.</p>

<h1 id="enfeitandolink">Enfeitando link</h1>

<div><a class='riscado' target="_self" href="#">underline virou texto riscado</a></div>

<div><a class='flores' href="#" target="_self">Nem tem link neste link, mas enfeitei também.</a></div>
  
  <div><a class='enfatico' href="#" target="_self">Era decoration, transformei em emphasis.</a></div>
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CSS 

              
                @import url('https://fonts.googleapis.com/css2?family=Inter');

* {text-decoration-color:dodgerblue;
  text-decoration-thickness:5%; 
  text-emphasis:dodgerblue;
  text-emphasis-position:under;
  font-family:Inter, Arial; 
  color:#000033;
  text-underline-position:under;
text-decoration-skip-ink:none;}

 /* property duration timing-function delay|initial|inherit; */

body {background:#fffff0; border:2px tan dashed; margin:0; padding:10px;}

a {text-decoration:underline green solid;} 

a:hover {text-decoration:underline green wavy;} 

a:active {text-decoration:line-through red dashed;} 

code {font-family:"Courier New";}

div:has(a) {font-size:200%; padding:20px;}

div:has(code) {background:#ccc; color:#000; display:block; padding:20px; margin:20px;}

h1 {background:lightpink;padding:5px;}

p {font-size:200%; margin-bottom:30px; padding-bottom:0; padding-top:0;}

/* classes daqui para baixo */
.solid {
  text-decoration-line: underline;
  text-decoration-style: solid;
}

.wavy {
  text-decoration-line: underline;
  text-decoration-style: wavy;
}

.double {
  text-decoration-line: underline;
  text-decoration-style: double;
}

.dashed {
  text-decoration-line: overline underline;
  text-decoration-style: dashed;
}

.dotted {text-decoration-color:darkred;
  text-decoration-line: line-through;
  text-decoration-style: dotted;
  text-decoration-thickness:15%;
}

.dashed:hover {text-decoration:overline underline dotted orange;}

.filled {text-emphasis: filled double-circle dodgerblue;}

.dot {text-emphasis:dot tan;}

.opentri {text-emphasis:open triangle #000;}

.borboleta {text-emphasis:"🦋"; text-emphasis-position:over;}

.abelha {text-emphasis:"🐝"; text-emphasis-position:over; font-family:"Courier New",monospace;}

.loop {text-emphasis:"➿" #f0f; text-emphasis-position:under;}

.double-circle {
  text-emphasis: open double-circle #702963;
}

.triangle {
  text-emphasis: triangle lightpink;
}

.triangulo {font-family:monospace;
  text-emphasis: triangle chocolate;
}

.sesame {text-emphasis:sesame deeppink;}

.flores {text-decoration:none; text-emphasis:"😐"; text-emphasis-position:under;}

a.flores:hover {text-decoration:none; text-emphasis:"😂"}

.enfatico:hover {text-decoration:none; text-emphasis:"#" salmon;}

a.riscado:hover {text-decoration:line-through red 10px;}
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JS
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