Matching Punctuations and Symbols

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Write a javascript code to match a word.

<html>
  <head>
    <script>
      
       function testMatch() 
       {
           var str = textfield.value;

           var pat = str.match(/student/g);

           if (pat != null) 
           {
               alert("The string "+ str + "contains student.");
           } 
           else 
           {
               alert("The string " + str + "does not contain student.");
           }
       }

    </script>
  </head>
<body>

          <h3> Checking the availability of word in given String. </h3>

          Enter the String: <input type="text" id="textfield" />

          <input type="button" value="Check" onclick="testMatch();" />

  </body>
</html>

Output:

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