Valid and Invalid Form Input with :valid and :invalid 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;
        border-radius: 3px;
      }
      input:invalid {
        border-color: red;
      }
      input:valid {
        border-color: green;
      }
    </style>
  </head>
  <body>
    <h3>Input pseudo-classes</h3>
    <p>:valid & :invalid</p>
    <form>
      <input type="email" placeholder="Enter Your Email" value="" />
    </form>
  </body>
</html>

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Valid and Invalid Form Input with :valid and :invalid Pseudo-Classes in CSS

Valid & Invalid

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