HTML Code

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>HTML Country Code Example</title>
</head>
<body>
  <h1>Welcome to our website!</h1>
  <p>We are pleased to serve customers from different countries.</p>

  <div class="country-info" data-country="US">
    <h2>United States</h2>
    <p>This section contains specific information for customers in the United States.</p>
  </div>

  <div class="country-info" data-country="GB">
    <h2>United Kingdom</h2>
    <p>This section contains specific information for customers in the United Kingdom.</p>
  </div>

  <script>
    var countryDivs = document.getElementsByClassName('country-info');
    for (var i = 0; i < countryDivs.length; i++) {
      var countryDiv = countryDivs[i];
      var country = countryDiv.getAttribute('data-country');
      if (country === 'US') {
        countryDiv.style.border = '2px solid blue';
      } else if (country === 'GB') {
        countryDiv.style.border = '2px solid red';
      }
    }
  </script>
</body>
</html>

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Country Code — Full Reference Example