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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

In CodePen, whatever you write in the HTML editor is what goes within the <body> tags in a basic HTML5 template. So you don't have access to higher-up elements like the <html> tag. If you want to add classes there that can affect the whole document, this is the place to do it.

About the <head>

In CodePen, whatever you write in the HTML editor is what goes within the <body> tags in a basic HTML5 template. If you need things in the <head> of the document, put that code here.

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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

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HTML 

              
                <body itemscope itemtype="https://schema.org/WebPage">
  <header class="page-header">
    <img src="https://via.placeholder.com/468x60?text=468x60 Banner Logo" alt="House of Ellis Logo">
  </header>

  <aside>
    <nav>
      <h1>Main</h1>
      <ul>
        <li><a href="#">Home</a></li>
        <li><a href="#">News</a></li>
        <li><a href="#">Reviews</a></li>
        <li><a href="#">Tutorials</a></li>
        <li><a href="#">Projects</a></li>
        <li><a href="#">About</a></li>
        <li><a href="#">Contact</a></li>
        <li><a href="#" target="_blank">RSS</a></li>
      </ul>
    </nav>
    <section>
      <form>
        <h1><label for="search-term">Search</label></h1>
        <div>
          <input type="text" name="search-term" id="search-term">
          <input type="submit" id="search-submit" value="Search">
        </div>
      </form>
    </section>
    <section>
      <h1>Links</h1>
      <ul>
        <li><a href="#">External</a></li>
        <li><a href="#">External</a></li>
        <li><a href="#">External</a></li>
        <li><a href="#">External</a></li>
      </ul>
    </section>
  </aside>

  <main>
    <article itemprop="blogPost" itemscope itemtype="https://schema.org/BlogPosting">
      <meta itemprop="mainEntityOfPage" content="/link/to/single/post">

      <header>
        <h1>
          <a href="/link/to/category" itemprop="genre" content="Category">Category</a>:
          <a href="/link/to/single/post" itemprop="url">
            <span itemprop="name headline">Post Title</span>
          </a>
        </h1>
      </header>

      <div class="content" itemprop="description">
        <p>
          Lorem ipsum dolor sit amet, consectetur adipiscing elit. Etiam eu leo mollis, finibus augue nec, eleifend metus. Orci varius natoque penatibus et magnis dis parturient montes, nascetur ridiculus mus. Mauris augue mauris, lobortis at ex id, bibendum mollis eros. Etiam sit amet dolor sit amet risus dapibus aliquet eget eget magna. Pellentesque in arcu non metus laoreet finibus. Suspendisse non sollicitudin tellus. Aliquam erat volutpat. Curabitur gravida, ante id imperdiet condimentum, quam lectus euismod turpis, sed pharetra purus mauris sed mauris. Nulla rutrum congue turpis ac egestas. Nunc accumsan tortor purus, tempor pellentesque dui pharetra vitae. Vestibulum lobortis justo sed leo porta vehicula. Fusce accumsan orci eros, eu lobortis augue suscipit id. Phasellus et sodales elit, a pellentesque odio. Nam auctor neque sed consequat scelerisque. Suspendisse a finibus orci.
        </p>
      </div>

      <footer>
        <meta itemprop="dateModified" content="2017-04-11T12:52:01Z">
        <time datetime="2022-12-19T14:15:16Z" itemprop="datePublished">2022-12-19 14:15 GMT</time>
        <span role="separator">|</span>
        <span itemprop="keywords">
          <a href="/link/to/tag_1" title="View articles in this category" rel="category tag">Tag 1</a>
          <a href="/link/to/tag_2" title="View articles in this category" rel="category tag">Tag 2</a>
        </span>
      </footer>
    </article>

    <article itemprop="blogPost" itemscope itemtype="https://schema.org/BlogPosting">
      <meta itemprop="mainEntityOfPage" content="/link/to/single/post">

      <header>
        <h1>
          <a href="/link/to/category" itemprop="genre" content="Category">Category</a>:
          <a href="/link/to/single/post" itemprop="url">
            <span itemprop="name headline">Post Title</span>
          </a>
        </h1>
      </header>

      <div class="content" itemprop="description">
        <p>
          Lorem ipsum dolor sit amet, consectetur adipiscing elit. Etiam eu leo mollis, finibus augue nec, eleifend metus. Orci varius natoque penatibus et magnis dis parturient montes, nascetur ridiculus mus. Mauris augue mauris, lobortis at ex id, bibendum mollis eros. Etiam sit amet dolor sit amet risus dapibus aliquet eget eget magna. Pellentesque in arcu non metus laoreet finibus. Suspendisse non sollicitudin tellus. Aliquam erat volutpat. Curabitur gravida, ante id imperdiet condimentum, quam lectus euismod turpis, sed pharetra purus mauris sed mauris. Nulla rutrum congue turpis ac egestas. Nunc accumsan tortor purus, tempor pellentesque dui pharetra vitae. Vestibulum lobortis justo sed leo porta vehicula. Fusce accumsan orci eros, eu lobortis augue suscipit id. Phasellus et sodales elit, a pellentesque odio. Nam auctor neque sed consequat scelerisque. Suspendisse a finibus orci.
        </p>
      </div>

      <footer>
        <meta itemprop="dateModified" content="2017-04-11T12:52:01Z">
        <time datetime="2022-12-19T14:15:16Z" itemprop="datePublished">2022-12-19 14:15 GMT</time>
        <span role="separator">|</span>
        <span itemprop="keywords">
          <a href="/link/to/tag_1" title="View articles in this category" rel="category tag">Tag 1</a>
          <a href="/link/to/tag_2" title="View articles in this category" rel="category tag">Tag 2</a>
        </span>
      </footer>
    </article>
    <!-- Upto 8 more articles -->

    <nav class="pagination-container">
      <ul class="pagination">
        <li class="pagination__btn"><a href="#">&larr; Next</a></li>
        <li class="pagination__numbers"><a href="#">100</a></li>
        <li class="pagination__dots">...</li>
        <li class="pagination__numbers"><a href="#">55</a></li>
        <li class="pagination__numbers active"><a href="#">54</a></li>
        <li class="pagination__numbers"><a href="#">53</a></li>
        <li class="pagination__numbers"><a href="#">52</a></li>
        <li class="pagination__numbers"><a href="#">51</a></li>
        <li class="pagination__numbers"><a href="#">50</a></li>
        <li class="pagination__dots">...</li>
        <li class="pagination__numbers"><a href="#">1</a></li>
        <li class="pagination__btn"><a href="#">Previous &rarr;</a></li>
      </ul>
    </nav
  </main>

  <footer class="page-footer">Footer Content</footer>
!

CSS 

              
                /* My styles */
:root {
  --blk: #000;
  --wht: #fff;
  --hOrg: #ff7902;
  --lGry: #666;
  --dGry: #333;
}

body {
  display: grid;
  min-height: 100vh;
  grid-template: auto 1fr auto / auto 1fr auto;
  font: normal 10pt Verdana, Geneva, Arial, Helvetica, sans-serif;
}

a {
  background: transparent;
  color: var(--blk);
  font-size: 100%;
  margin: 0;
  padding: 0;
  text-decoration: underline;
  vertical-align: baseline;
}

a:hover {
  color: var(--hOrg);
}

h1 {
  box-sizing: border-box;
  all: unset;
  display: revert;
  font-size: 1.17em;
}

aside {
  grid-column: 1 / 2;
  padding: 0.125rem;
  width: 162px;
}

aside nav,
aside section {
  background-color: var(--blk);
  margin-bottom: 0.313rem;
  padding: 0.063rem;
}

aside h1 {
  color: var(--wht);
  text-align: right;
  font-weight: bold;
  padding: 0.125rem;
}

aside form div {
  background-color: var(--wht);
  padding: 0.125rem;
}

aside label {
  margin: 0;
  padding: 0;
}
aside input[type="text"] {
  width: 148px;
  margin-bottom: 0.125rem;
}

aside input[type="submit"] {
  width: 100%;
}

aside ul {
  background-color: var(--wht);
  list-style: none;
  margin: 0;
  padding: 0.125rem;
}

aside ul li {
}

article {
  background-color: var(--blk);
  padding: 1px;
  margin-bottom: 5px;
  max-width: 40rem;
}

article h1 {
  color: var(--wht);
  font-weight: bold;
  margin: 0;
  padding: 0.125rem 0.313rem;
}

article h1 a {
  color: var(--wht);
}

article footer {
  color: var(--wht);
  font-size: smaller;
  padding: 0.125rem;
}

article footer a {
  color: #fff;
}

article .content {
  background-color: var(--wht);
  padding: 0.313rem 0.125rem;
}

main {
  grid-column: 2 / 4;
  padding: 0.125rem;
}

.page-footer {
  padding: 0.125rem;
  text-align: center;
  grid-column: 1 / 4;
}

.page-header {
  grid-column: 1 / 4;
  height: 60px;
  margin: 0.125rem;
  padding: 0;
}

/** pagination **/
.pagination-container {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
}

.pagination-container ul {
  list-style-type: none;
}

.pagination {
  display: flex;
  justify-content: center;
  align-items: center;
}

.pagination__numbers,
.pagination__btn,
.pagination__dots {
  display: flex;
  justify-content: center;
  align-items: center;
  cursor: pointer;
}

.pagination__dots {
  width: 2.6rem;
  height: 2.6rem;
  color: var(--lGry);
  cursor: initial;
}

.pagination__numbers {
  width: 2rem;
  height: 2rem;
}

.pagination__numbers a:hover {
  color: var(--lGry);
}

.pagination__numbers.active {
  background: var(--blk);
  font-weight: 600;
}

.pagination__numbers.active a {
  color: var(--wht);
}

.pagination__numbers.active a:hover {
  color: var(--hOrg);
}
!

JS
!
999px

Console