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HTML

              
                   <div class="container">
     <div class="col col-3">
       <div class="comp-holder">
         <div data-table="comp-01" class="comp js-draggable" draggable='true' ondragstart='onDragStart(event);' ondragend="onDragEnd(event);">
           [Header component]
         </div>
         <div data-table="comp-02" class="comp js-draggable" draggable='true' ondragstart='onDragStart(event);' ondragend="onDragEnd(event);">
           [Image component]
         </div>
         <div data-table="comp-03" class="comp js-draggable" draggable='true' ondragstart='onDragStart(event);' ondragend="onDragEnd(event);">
           [Text component]
         </div>

         <div data-table="comp-04" class="comp js-draggable" draggable='true' ondragstart='onDragStart(event);' ondragend="onDragEnd(event);">
           [Footer component]
         </div>
       </div>
     </div>
     <div class="col col-9">
       <h3>Dropzone</h3>
       <div id="dropzone" class="editor-view" ondragover='onDragOver(event);' ondrop='onDrop(event);'>
       </div>
     </div>

     <div class="hidden">
       <header class="actual-comp" id="comp-01">
         <a href="https://daily-dev-tips.com">
           <img src="https://daily-dev-tips.com/images/logo.png" height="50" />
         </a>
         <a href="#">Menu</a>
       </header>
       <div class="actual-comp" id="comp-02">
         <img class="image" src="https://images.unsplash.com/photo-1587588354456-ae376af71a25?ixlib=rb-1.2.1&ixid=eyJhcHBfaWQiOjEyMDd9&auto=format&fit=crop&w=1950&q=80" />
       </div>
       <div class="actual-comp" id="comp-03">
         <p class="text">Lorem ipsum dolor sit amet, consectetur adipiscing elit. Integer quis cursus massa, eget fringilla dolor. Praesent ligula libero, luctus sit amet urna a, semper scelerisque lorem. Curabitur efficitur, tortor in tempor elementum, orci quam mollis quam, nec fermentum lacus mauris eu nisl. Praesent elementum eros et justo faucibus, sed vestibulum mauris tincidunt. Aenean suscipit ultrices tellus, at aliquam diam. Class aptent taciti sociosqu ad litora torquent per conubia nostra, per inceptos himenaeos. Vivamus non maximus mauris, nec finibus risus. Donec sit amet massa malesuada, mollis mi nec, condimentum justo. Pellentesque velit ligula, feugiat eget nisi quis, mattis eleifend sem. Proin pretium risus ligula, a aliquet elit commodo sit amet.</p>
       </div>
       <footer class="actual-comp" id="comp-04">&copy; Daily Dev Tips 2020</footer>
     </div>
              
            
!

CSS

              
                * {
  margin: 0;
  padding: 0;
  font-family: Roboto, "Helvetica Neue", Arial, sans-serif;
}
.container {
  min-height: 100vh;
  display: flex;
  padding: 1rem;

  .col {
    padding-right: 0.5rem;
    padding-left: 0.5rem;
  }
  .col-3 {
    flex-basis: 25%;
  }
  .col-9 {
    flex-basis: 75%;
    h3 {
      text-align: center;
      margin-bottom: 0.5rem;
    }
  }
  .editor-view {
    border: 2px dotted #efefef;
    min-height: 400px;
    width: 100%;
  }
}

.comp {
  background: #2a9d8f;
  color: #fff;
  height: 50px;
  margin-bottom: 0.5rem;
  display: flex;
  justify-content: center;
  align-items: center;
  &-remove {
    position: absolute;
    color: red;
    top: calc(50% - 12px);
    right: 15px;
    font-weight: bold;
    cursor: pointer;
    pointer-events: all;
  }
}
.hidden {
  display: none;
}
.actual-comp {
  position: relative;
  max-width: 100%;
  &-remove {
    position: absolute;
    color: red;
    top: calc(50% - 12px);
    right: 15px;
    font-weight: bold;
    cursor: pointer;
    pointer-events: all;
  }
}

/*
 * These are all the components styled not really important for the actual purpose */
header {
  background: #264653;
  height: 70px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.5rem;
  padding: 0 1rem;
  a {
    color: #fff;
  }
}
.image {
  max-width: 100%;
  border-radius: 5px;
  border: 5px solid #efefef;
  margin: 0.5rem 0;
}
footer {
  background: #264653;
  color: #fff;
  height: 70px;
  display: flex;
  justify-content: center;
  align-items: center;
  margin-top: 0.5rem;
}
.text {
  margin: 0.5rem;
}

              
            
!

JS

              
                // Global vars
const dropzone = document.getElementById("dropzone");

function onDragStart(event) {
  event.dataTransfer.setData("text/plain", event.currentTarget.dataset.table);
  event.currentTarget.style.backgroundColor = "#e9c46a";
}

function onDragEnd(event) {
  event.currentTarget.style.backgroundColor = "#2a9d8f";
}

function onDragOver(event) {
  event.preventDefault();
}

function onDrop(event) {
  let id = event.dataTransfer.getData("text");

  const draggableElement = document.getElementById(id);
  const clone = draggableElement.cloneNode(true);

  const remove = document.createElement("div");
  remove.classList.add("comp-remove");
  remove.innerHTML = "X";
  clone.appendChild(remove);

  const dropElementY = event.y;

  // Get all main tables in the dropzone and get those positions based off the y position
  const compTables = dropzone.querySelectorAll(".actual-comp");

  if (compTables.length >= 1) {
    for (i = 0; i < compTables.length; i++) {
      const compTablesY1 =
        compTables[i].getBoundingClientRect().y +
        compTables[i].getBoundingClientRect().height / 2;
      const compTablesY2 =
        compTables[i].getBoundingClientRect().y +
        compTables[i].getBoundingClientRect().height;

      // Check if dropElementY is smaller then compTablesY1 (insert above)
      if (dropElementY <= compTablesY1) {
        compTables[i].parentNode.insertBefore(clone, compTables[i]);
        break;
      }
      // Check if dropElementY is smaller then compTablesY2 (insert below)
      if (dropElementY <= compTablesY2) {
        compTables[i].parentNode.insertBefore(clone, compTables[i].nextSibling);
        break;
      }
      dropzone.appendChild(clone);
    }
  } else {
    // No tables yet
    dropzone.appendChild(clone);
  }

  event.dataTransfer.clearData();
}

function removeElement(element) {
  element.parentNode.removeChild(element);
}

document.addEventListener(
  "click",
  function (event) {
    // If the clicked element doesn't have the right selector, bail
    if (!event.target.matches(".comp-remove")) return;
    // Don't follow the link
    event.preventDefault();
    // Get the parent element
    const parent = event.target.parentNode;
    // Delete the actual table parent;
    parent.parentNode.removeChild(parent);
  },
  false
);

              
            
!
999px

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