Relative positioned <span> inside a <p> element

August 7, 2024

I need a span to be displayed as a marker BENEATH important texts on my page.

It should have been positioned at the bottom of the p element – but it does not.

Can someone tell me what’s wrong in the code?

.marker {
  position: absolute;
  bottom: 0px;
  background-color: red;
  height: 3.9px;
}

<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
  <link rel="stylesheet" href="a.css">
</head>

<body>
  <div>
    <p>
      This is
      <span>IMPORTANT INFORMATION THAT NEEDS TO BE EMPHASIZED
          <span class="marker"></span>
      </span>
    </p>
  </div>
</body>
</html>

>Solution :

Quote in comments: "What is it that you actually try to do? Do you want to mark that by underlining it?
Respond of OP: "Yes, exactly"

XY problem here. Instead of using a pseudo-element and positioning it, Simply add the underline as border-bottom to element itself:

.marker {
  border-bottom: 3.9px solid red;
}

<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
  <link rel="stylesheet" href="a.css">
</head>

<body>
  <div>
    <p>
      This is
      <span class="marker">IMPORTANT INFORMATION THAT NEEDS TO BE EMPHASIZED</span>
    </p>
  </div>
</body>
</html>