JavaScript string indexOf method

<html>
  <head>
    <title>javascript indexOf case-sensetive method</title>
  </head>
  <body>
    <h1> indexOf() case-sensetive method</h1>
    <p id='match'></p>
    <p id='not-match'></p>
    
    <script>
      var name = 'John the Don is Don'
      var match = name.indexOf('Don'); 
      document.getElementById('match').innerHTML=match;
      
      var notMatch = name.indexOf('don');
      document.getElementById('not-match').innerHTML = notMatch;
      
    </script>
  </body>

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