index.html

<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>HOME</title>
    <link rel="stylesheet" type="text/css" href="style.css" />
  </head>
  <body>
    <div class="select-box">
      <div class="select-option">
        <input type="text" placeholder="select" id="soValue" readonly name="" />
      </div>
      <div class="content">
        <div class="search">
          <input type="text" id="optionsearch" placeholder="search" name="" />
        </div>
        <ul class="options">
          <li>HTML</li>
          <li>CSS</li>
          <li>Javascript</li>
          <li>php</li>
          <li>python</li>
          <li>React</li>
          <li>Angular</li>
        </ul>
      </div>
    </div>
    <script src="main.js"></script>
  </body>
</html>