Input Elements with Custom Pseudo-Classes in CSS

<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Input pseudo-classes</title>
    <style>
      input {
        outline: none;
      }
      input:read-only {
        background-color: pink;
      }
      input:read-write {
        background-color: lime;
      }
    </style>
  </head>
  <body>
    <h3>Input pseudo-classes</h3>
    <p>:read-only and :read-write</p>

    <input type="text" placeholder="first name" readonly />
    <input type="text" placeholder="last name" />
  </body>
</html>

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Input Elements with Custom Pseudo-Classes in CSS

Read-only & Read-write

Source Code :

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