Example of creating a blur effect on text block using CSS|CSS Snippet|W3Docs

Source Code: (back to article)

<!DOCTYPE html>
<html>
  <head>
    <title>Blur Effect on Text Block</title>
    <style>
      * {
        box-sizing: border-box;
      }
      .text-block {
        background: url(https://w3docs.com/uploads/media/default/0001/03/0a71a511b3381286ced8e2fc7f331296cd96649f.png);
        background-attachment: fixed;
        width: 300px;
        height: 200px;
        position: relative;
        overflow: hidden;
        margin: 20px;
      }
      .text-block > header {
        position: absolute;
        bottom: 0;
        left: 0;
        width: 100%;
        padding: 20px 10px;
        background: inherit;
        background-attachment: fixed;
      }
      .text-block > header::before {
        content: "";
        position: absolute;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background: inherit;
        background-attachment: fixed;
        -webkit-filter: blur(9px);
        filter: blur(9px);
        transform: scale(2) translateY(20px);
      }
      .text-block > header > h2 {
        margin: 0;
        color: white;
        position: relative;
        z-index: 1;
      }
    </style>
  </head>
  <body>
    <h1>Blur Effect on Text Block</h1>
    <div class="text-block">
      <header>
        <h2>
          Blur Effect
        </h2>
      </header>
    </div>
  </body>
</html>