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Prototype empty() Method


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This method checks if the string is empty. This method is different from blank(). See example carefully.

Syntax:

string.empty();

Return Value:

  • Returns a boolean value. If string is empty then it returns true otherwise false.

Example:

<html>
<head>
<title>Prototype examples</title>
<script type="text/javascript" 
   src="/javascript/prototype.js">
</script>
<script>

function showResult(){

  var str = '';
  alert("''.empty() : " + str.empty() );
  alert("''.blank() : " + str.blank() );

  var str = ' ';
  alert("' '.empty() : " + str.empty() );
  alert("' '.blank() : " + str.blank() );

}

</script>
</head>

<body>

  <p>Click the button to see the result.</p>
  <br />
  <br />
  <input type="button" value="Result" onclick="showResult();"/>

</body>
</html>

To understand it in better way you can Try it yourself.



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