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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.

            
              <!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>Hold Shift to Check Multiple Checkboxes</title>
</head>
<body>
   <!--
   The following is a common layout you would see in an email client.
   When a user clicks a checkbox, holds Shift, and then clicks another checkbox a few rows down, all the checkboxes inbetween those two checkboxes should be checked.
  -->
  <div class="inbox">
    <div class="item">
      <input type="checkbox">
      <p>This is an inbox layout.</p>
    </div>
    <div class="item">
      <input type="checkbox">
      <p>Check one item</p>
    </div>
    <div class="item">
      <input type="checkbox">
      <p>Hold down your Shift key</p>
    </div>
    <div class="item">
      <input type="checkbox">
      <p>Check a lower item</p>
    </div>
    <div class="item">
      <input type="checkbox">
      <p>Everything in between should also be set to checked</p>
    </div>
    <div class="item">
      <input type="checkbox">
      <p>Try to do it without any libraries</p>
    </div>
    <div class="item">
      <input type="checkbox">
      <p>Just regular JavaScript</p>
    </div>
    <div class="item">
      <input type="checkbox">
      <p>Good Luck!</p>
    </div>
    <div class="item">
      <input type="checkbox">
      <p>Don't forget to tweet your result!</p>
    </div>
  </div>

<script>
</script>
</body>
</html>
            
          
!
            
                html {
      font-family: sans-serif;
      background: #ffc600;
    }
    .inbox {
      max-width: 400px;
      margin: 50px auto;
      background: white;
      border-radius: 5px;
      box-shadow: 10px 10px 0 rgba(0,0,0,0.1);
    }
    .item {
      display: flex;
      align-items: center;
      border-bottom: 1px solid #F1F1F1;
    }
    .item:last-child {
      border-bottom: 0;
    }
    input:checked + p {
      background: #F9F9F9;
      text-decoration: line-through;
    }
    input[type="checkbox"] {
      margin: 20px;
    }
    p {
      margin: 0;
      padding: 20px;
      transition: background 0.2s;
      flex: 1;
      font-family:'helvetica neue';
      font-size: 20px;
      font-weight: 200;
      border-left: 1px solid #D1E2FF;
    }
            
          
!
            
              const checkboxes = document.querySelectorAll('input[type="checkbox"]')
//step 1: keep track of last checked box
//step 2: is shiftkey down?
    //if yes, check everyhing in btw
      //loop through all boxes again and check all in between
    //if no, just check current box

let lastChecked; //keep track of last checked box

function handleCheck(e){
  let inBetween = false; 
  if (e.shiftKey === true){
    checkboxes.forEach(item => {
       //keep track of in between boxes by toggling inBetween to be true for all boxes in between, and then toggle it back to false after. If you dont understand, go through line by line what happen to each box when click and shift.
       if (item === this || item === lastChecked){
         inBetween = !inBetween;
       }
       //check every box in between
       if (inBetween){
         item.checked = true;
       }
    })
  }
  
  lastChecked = this //keep track of last checked box
}

checkboxes.forEach(item => item.addEventListener('click', handleCheck));
            
          
!
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