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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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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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HTML 

              
                <base href="https://raw-dot-custom-elements.appspot.com/JeffLeFoll/slate-font-awesome/4.7.3/slate-font-awesome/">
<script src="../webcomponentsjs/webcomponents-lite.js"></script>

<link rel="icon" href="demo/favicon.ico" type="image/x-icon" />
<link rel="shortcut icon" href="demo/favicon.ico" type="image/x-icon" />

<script>
  // setup Polymer options
  window.Polymer = { lazyRegister: true, dom: "shadow" };
  // load webcomponents polyfills
  (function() {
    if (
      "registerElement" in document &&
      "import" in document.createElement("link") &&
      "content" in document.createElement("template")
    ) {
      // browser has web components
    } else {
      // polyfill web components
      var e = document.createElement("script");
      e.src = "../../webcomponentsjs/webcomponents-lite.js";
      document.head.appendChild(e);
    }
  })();
</script>

<link rel="import" href="../polymer/polymer-element.html">
<link rel="import" href="../iron-demo-helpers/demo-snippet.html">
<link rel="import" href="../iron-demo-helpers/demo-pages-shared-styles.html">
<link rel="import" href="slate-font-awesome.html">

<custom-style>
  <style is="custom-style" include="demo-pages-shared-styles slate-font-awesome">
    .centered {
      max-width: 50vw;
    }
  </style>
</custom-style>

<body unresolved>
  <div class="centered">
    <h4>Icons</h4>
    <demo-snippet>
      <template>
        <dom-module id="slate-font-awesome-example">
          <template>
            <style include="slate-font-awesome"></style>
            <i class="fa fa-camera-retro lg"></i> fa-lg <br>
            <i class="fa fa-camera-retro fa-2x"></i> fa-2x <br>
            <i class="fa fa-camera-retro fa-3x"></i> fa-3x <br>
            <i class="fa fa-fighter-jet fa-spin fa-3x fa-fw"></i> Top Gun Style :) <br>
            <span class="fa-stack fa-lg">
              <i class="fa fa-camera fa-stack-1x"></i>
              <i class="fa fa-ban fa-stack-2x" style="color: red;"></i>
            </span> fa-ban on fa-camera
          </template>

          <script>
            HTMLImports.whenReady( function() {
              class SlateFontAwesomeExample extends Polymer.Element {
                static get is() {
                  return "slate-font-awesome-example";
                }
              }
              window.customElements.define(
                SlateFontAwesomeExample.is,
                SlateFontAwesomeExample
              );
            });
          </script>
        </dom-module>
        <slate-font-awesome-example></slate-font-awesome-example>
      </template>
    </demo-snippet>
  </div>
</body>
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