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Use npm Packages

We can make npm packages available for you to use in your JavaScript. We use webpack to prepare them and make them available to import. We'll also process your JavaScript with Babel.

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HTML Settings

Here you can Sed posuere consectetur est at lobortis. Donec ullamcorper nulla non metus auctor fringilla. Maecenas sed diam eget risus varius blandit sit amet non magna. Donec id elit non mi porta gravida at eget metus. Praesent commodo cursus magna, vel scelerisque nisl consectetur et.

              <div class="example-cntr">
    <h1>CSS <code>:lang()</code> pseudo-class</h1>
    <p>The <code>:lang()</code> pseudo-class matches the language of an element determined by combination of the <code>lang=""</code> HTML attribute, the <code>&lt;meta></code> element and by information from the protocol like HTTP headers.</p>
    <p>The <code>lang=""</code> HTML attribute is commonly used in the <code>&lt;html></code> tag but it can also be used in any other tag if necessary.</p>
    <article lang="en">
        <q>If you already know some HTML and CSS, and understand the principles of responsive web design, this book is for you.</q>
    <article lang="fr">
        <q>Si vous connaissez déjà les bases du HTML et CSS, et comprennez les principes du design web adaptif, ce livre est pour vous.</q>
    <article lang="de">
        <q>Falls Sie schon mit HTML und CSS vertraut sind, und die Prinzipien von responsivem Webdesign verstehen, ist dieses Buch für Sie.</q>
     <article lang="de" class="ua">
        <h4>German 2 - <span class="note">This paragraph is also in German but the quote marks are added by the browser's User Agent. Either style of quote marks are correct for the German language.</span></h4>
        <q>Falls Sie schon mit HTML und CSS vertraut sind, und die Prinzipien von responsivem Webdesign verstehen, ist dieses Buch für Sie.</q>
              :lang(en) q { quotes: '“' '”'; }
:lang(fr) q { quotes: '«' '»'; }
:lang(de):not(.ua) q { quotes: '»' '«'; }

//Styling stuff not needed for demo
body {
    text-align: left;
    line-height: 1.5;
h1 {
    font-size: 22px;
    text-transform: none;
    border-bottom: #636363 1px dotted;
    code {
        display: inline-block;
        margin-bottom: 10px;
        color: $y;
        background: none;
        box-shadow: none;
h3 span { font:italic normal 16px 'Source Sans Pro'; }
h4 {
    margin-bottom: 5px;
    padding-bottom: 5px;
    border-bottom: #333 1px solid;
    box-shadow: inset 0 -1px 0 #222;
code { font-size: 1em; }
.example-cntr {
    max-width: 800px;
    margin: 0 auto 50px;
    padding: 30px;
    box-shadow: 0 1px 2px rgba(black,.3);
    background: rgba(black,.15);
    & > code {
        display: block;
        margin-bottom: 10px;
        font-size: 22px;
        color: $y;
        background: none;
        box-shadow: none;
article {
    width: 90%;
    margin: auto;
    h4 { color: $y; }
q {
    font-family: Georgia;
    font-style: italic;
    color: #ddd;
.note {
    color: desaturate($y,50);
    font-size: 12px;
    letter-spacing: .5px;
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