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 = "[email protected]";

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:

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JavaScript test() method

JavaScript test() method

JavaScript test() method

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