JavaScript string indexOf method

<html>
  <head>
    <title> javascript indexOf method </title>
  </head>
  <body>
    <h1>Javascript indexOf</h1>
    <p> Javascript indexOf return fisrt index of first searchValue</p>
    <p id='demo'></p>
    
    <script>
      var name = 'John the Don is Don'
      var index = name.indexOf('Don');
      document.getElementById('demo').innerHTML=index;
    </script>
  </body>

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