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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 

              
                <div id="right_panel">
  <div class="wrap-table">
    <table>
      <thead>
        <tr>
          <th scope="col" class="sticky-col">Customer</th>
          <th scope="col">Status</th>
          <th scope="col">Course</th>
          <th scope="col">Enrolled</th>
          <th scope="col">Progress</th>
          <th scope="col">Date</th>
          <th scope="col" class="sticky-col sticky-col-right">Actions</th>
        </tr>
      </thead>
      
      <tbody>
        <tr>
          <td class="sticky-col" scope="row" data-label="Customer">
            <div class="user__info">
              <label>
                <input type="checkbox">
                <span>
                  <svg xmlns="http://www.w3.org/2000/svg" fill="none" viewBox="0 0 24 24" stroke-width="2" stroke="currentColor" class="w-6 h-6">
  <path stroke-linecap="round" stroke-linejoin="round" d="M4.5 12.75l6 6 9-13.5" />
</svg>
</span>
              </label>
               <img class="user__photo" src="https://images.unsplash.com/photo-1517841905240-472988babdf9?ixlib=rb-1.2.1&amp;ixid=eyJhcHBfaWQiOjEyMDd9&amp;auto=format&amp;fit=facearea&amp;facepad=2&amp;w=256&amp;h=256&amp;q=80" alt="">
              <div>
                <div class="user__name">Lindsay Walton</div>
                <div class="user__email">lindsay@example.com</div>
              </div>
            </div>
          </td>
          <td data-label="Status">
            <div class="user__badge">Enrolled</div>
          </td>
          <td data-label="Course">
            <span>HTML</span>
          </td>
          <td data-label="Enrolled">Member</td>
          <td data-label="Progress">
            <progress value="32" max="100"> 32% </progress>
          </td>
          <td data-label="Date">9/08/2023</td>
          <td data-label="Actions" class="sticky-col sticky-col-right">
            <a href="#" class="user__edit">Edit</a>
            </td>
            </tr>
        <tr>
          <td class="sticky-col" scope="row" data-label="Customer">
            <div class="user__info">
              <label>
                <input type="checkbox">
                <span>
                  <svg xmlns="http://www.w3.org/2000/svg" fill="none" viewBox="0 0 24 24" stroke-width="2" stroke="currentColor" class="w-6 h-6">
  <path stroke-linecap="round" stroke-linejoin="round" d="M4.5 12.75l6 6 9-13.5" />
</svg>
</span>
              </label>
               <img class="user__photo" src="https://t4.ftcdn.net/jpg/02/14/74/61/360_F_214746128_31JkeaP6rU0NzzzdFC4khGkmqc8noe6h.jpg" alt="">
              <div>
                <div class="user__name">Marvin McKinney</div>
                <div class="user__email">marvin@example.com</div>
              </div>
            </div>
          </td>
          <td data-label="Status">
            <div class="user__badge">Enrolled</div>
          </td>
          <td data-label="Course">
            <span>CSS</span>
          </td>
          <td data-label="Enrolled">Member</td>
          <td data-label="Progress">
            <progress value="56" max="100"> 56% </progress>
          </td>
          <td data-label="Date">3/13/2023</td>
          <td data-label="Actions" class="sticky-col sticky-col-right">
            <a href="#" class="user__edit">Edit</a>
            </td>
            </tr>
        <tr>
          <td class="sticky-col" scope="row" data-label="Customer">
            <div class="user__info">
              <label>
                <input type="checkbox">
                <span>
                  <svg xmlns="http://www.w3.org/2000/svg" fill="none" viewBox="0 0 24 24" stroke-width="2" stroke="currentColor" class="w-6 h-6">
  <path stroke-linecap="round" stroke-linejoin="round" d="M4.5 12.75l6 6 9-13.5" />
</svg>
</span>
              </label>
               <img class="user__photo" src="https://img.freepik.com/free-photo/female-looking-directly-into-camera_273609-12389.jpg?t=st=1698951187~exp=1698951787~hmac=56a4af748044a4b82323def79882a55ac39f150aea6e1738cba45a52f3e9563a" alt="">
              <div>
                <div class="user__name">Alma Lawson</div>
                <div class="user__email">alma@example.com</div>
              </div>
            </div>
          </td>
          <td data-label="Status">
            <div class="user__badge user__badge_unpaid">Not paid</div>
          </td>
          <td data-label="Course">
            <span>Ruby on Rails</span>
          </td>
          <td data-label="Enrolled">Member</td>
          <td data-label="Progress">
            <progress value="12" max="100"> 12% </progress>
          </td>
          <td data-label="Date">10/02/2023</td>
          <td data-label="Actions" class="sticky-col sticky-col-right">
            <a href="#" class="user__edit">Edit</a>
            </td>
            </tr>
        <tr>
          <td class="sticky-col" scope="row" data-label="Customer">
            <div class="user__info">
              <label>
                <input type="checkbox">
                <span>
                  <svg xmlns="http://www.w3.org/2000/svg" fill="none" viewBox="0 0 24 24" stroke-width="2" stroke="currentColor" class="w-6 h-6">
  <path stroke-linecap="round" stroke-linejoin="round" d="M4.5 12.75l6 6 9-13.5" />
</svg>
</span>
              </label>
               <img class="user__photo" src="https://as2.ftcdn.net/v2/jpg/02/24/86/95/1000_F_224869519_aRaeLneqALfPNBzg0xxMZXghtvBXkfIA.jpg" alt="">
              <div>
                <div class="user__name">Floyd Miles</div>
                <div class="user__email">floyd@example.com</div>
              </div>
            </div>
          </td>
          <td data-label="Status">
            <div class="user__badge">Enrolled</div>
          </td>
          <td data-label="Course">
            <span>CSS</span>
          </td>
          <td data-label="Enrolled">Member</td>
          <td data-label="Progress">
            <progress value="100" max="100"> 100% </progress>
          </td>
          <td data-label="Date">6/12/2023</td>
          <td data-label="Actions" class="sticky-col sticky-col-right">
            <a href="#" class="user__edit">Edit</a>
            </td>
            </tr>
        <tr>
          <td class="sticky-col" scope="row" data-label="Customer">
            <div class="user__info">
              <label>
                <input type="checkbox">
                <span>
                  <svg xmlns="http://www.w3.org/2000/svg" fill="none" viewBox="0 0 24 24" stroke-width="2" stroke="currentColor" class="w-6 h-6">
  <path stroke-linecap="round" stroke-linejoin="round" d="M4.5 12.75l6 6 9-13.5" />
</svg>
</span>
              </label>
               <img class="user__photo" src="https://img.freepik.com/free-photo/pretty-smiling-joyfully-female-with-fair-hair-dressed-casually-looking-with-satisfaction_176420-15187.jpg?t=st=1698950906~exp=1698951506~hmac=d7a71b36eec872667dc27ea767679dc74adf02bff3acb18a1b1523b63843fdfa" alt="">
              <div>
                <div class="user__name">Georgia Young</div>
                <div class="user__email">georgia@example.com</div>
              </div>
            </div>
          </td>
          <td data-label="Status">
            <div class="user__badge user__badge_pending">Pending</div>
          </td>
          <td data-label="Course">
            <span>JavaScript</span>
          </td>
          <td data-label="Enrolled">Member</td>
          <td data-label="Progress">
            <progress value="10" max="100"> 10% </progress>
          </td>
          <td data-label="Date">9/29/2023</td>
          <td data-label="Actions" class="sticky-col sticky-col-right">
            <a href="#" class="user__edit">Edit</a>
            </td>
            </tr>
      </tbody>
    </table>
  </div>
  <button id="btn_resize">
    <span></span>
  </button>
</div>
!

CSS 

              
                @import url('https://fonts.googleapis.com/css2?family=Poppins:wght@100;400;500;600&display=swap');

body {
  font-family: 'Poppins', sans-serif;
  display: flex;
  justify-content: center;
  padding: 40px 0;
  color: #111827;
}

.wrap-table {
  border: 1px solid #e5e7eb;
  border-radius: 12px;
  overflow-x: auto;
  width: 100%;
  container-type: inline-size;
  container-name: table;
}

table {
  border-collapse: collapse;
  width: 100%;
  font-size: 14px;
}

th {
  font-weight: 700;
  color: #374151;
  font-size: 14px;
  padding: 12px 14px;
  text-align: left;
  background: #f9fafb;
  border-bottom: 1px solid #e5e7eb;
}

td {
  padding: 12px 14px;
  border-bottom: 1px solid #e5e7eb;
  background: #fff;
}

.user__photo {
  width: 48px;
  height: 48px;
  object-fit: cover;
  border-radius: 100px;
}

.user__info {
  display: flex;
  align-items: center;
  gap: 12px;
}

.user__name {
  font-size: 14px;
  font-weight: 600;
  color: #111827;
}

.user__email {
  font-size: 12px;
  color: #4b5563;
}

.user__badge {
  width: max-content;
  background: #dcfce7;
  border-radius: 6px;
  border: 1px solid #15803d;
  color: #15803d;
  padding: 4px 12px;
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  font-weight: 500;
}

.user__badge:before {
  content: "";
  width: 4px;
  height: 4px;
  border-radius: 100px;
  background: #15803d;
  display: block;
}

.user__badge_pending {
  background: #fefce8;
  color: #8a551c;
  border-color: #f4e7c5;
}

.user__badge_pending:before {
  background: #8a551c;
}

.user__badge_unpaid {
  background: #fef2f2;
  color: #b91c1c;
  border-color: #fbe0e0;
}

.user__badge_unpaid:before {
  background: #b91c1c;
}

.user__edit {
  display: block;
  padding: 4px 12px;
  text-decoration: none;
}

input {
  display: none;
}

input + span {
  display: block;
  width: 16px;
  height: 16px;
  border: 2px solid #d1d5db;
  border-radius: 4px;
  transition: .3s;
  cursor: pointer;
}

input + span > svg {
  opacity: 0;
}

input:checked + span {
  background: #dcfce7;
  border: 2px solid #15803d;
  color: #15803d;
}

input:checked + span > svg {
  opacity: 1;
}

progress {
  display: block;
  width: 100px;
  height: 7px;
  -webkit-appearance: none;
  border-radius: 10px;
}

progress::-webkit-progress-bar {
  background-color: #eee;
  border-radius: 10px;
}

progress::-webkit-progress-value {
  background-color: #10b981;
  border-radius: 10px;
}

.user__edit {
  padding: 8px 12px;
  border-radius: 6px;
  background: #6366f1;
  color: #fff;
  text-align: center;
  font-weight: 500;
}

@container table (min-width: 400px) {
    .sticky-col {
     position: sticky;
     left: 0;
  }
  
  .sticky-col-right {
    right: 0;
  }
}

@container table (max-width: 400px) {
  td::before {
      content: attr(data-label);
      font-weight: 700;
      color: #374151;
      font-size: 14px;  
  }
  
  label {
    display: none;
  }
  
  td {
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-bottom: none;
  }
  
  td:first-child {
    background: #f9fafb;
  }
  
  th {
    display: none;
  }
}









#right_panel {
  width: 1000px;
  position:relative;
}

#btn_resize {
  cursor: ew-resize;
  width: 14px;
  height: 100%;
  position: absolute;
  top:0;
  left: calc(100% + 3px);
  background: #fff;
  display: flex;
  align-items: start;
  justify-content: center;
  border: none;
  padding: 0;
}

#btn_resize span {
  background: #94a3b8;
  height: 32px;
  width: 4px;
  display: block;
  border-radius: 10px;
}
!

JS 

              
                const BORDER_SIZE = 14;
const panel = document.getElementById("right_panel");

let m_pos;
function resize(e){
  const dx = m_pos - e.x;
  m_pos = e.x;
  panel.style.width = (parseInt(getComputedStyle(panel, '').width) - dx) + "px";
}

panel.addEventListener("mousedown", function(e){
  if (e.offsetX < BORDER_SIZE) {
    m_pos = e.x;
    document.addEventListener("mousemove", resize, false);
  }
}, false);

document.addEventListener("mouseup", function(){
    document.removeEventListener("mousemove", resize, false);
}, false);
!
999px

Console