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JavaScript test() method

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In this section, you will study the use of test() method. The test() method returns true if a pattern exists within a string, otherwise it returns false. This method searches a string for a specified value.

JavaScript test() method

     

In this section, you will study the use of test() method. The test() method returns true if a pattern exists within a string, otherwise it returns false. This method searches a string for a specified value. You can see in the given example, we have used RegExp in order to search the specified pattern in the string. The expression pattern.test(st1) tests whether the specified pattern('@') exists in the Email ID or not.

 

 

 

 

 

Here is the code:

<html>
<head>
<h2> Use of test() method</h2>
<script type="text/javascript">
var st1 = "peter@roseindia.net";
var st2 = new RegExp("@");
if (st2.test(st1))
document.write(st1 + " is a valid Email ID")
else
document.write(st1 + " is an invalid Email ID");
</script>
</head>
</html>

Output will be displayed as:

Download Source Code

 

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Posted on: November 15, 2008

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Comments:1
sangipagi
June 27, 2012
question

can u explain regular expression concept in javascript
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