JavaScript RegExp test() Method

The RegExp test() Method in JavaScript is used to test for match in a string. If there is a match this method returns true else it returns false.

Syntax: 

RegExpObject.test(str)

Where str is the string to be searched. This is required field.

Example 1: This example searches for the string “computer” in the original string.  

html

<h1 style="color:green">
    GeeksforGeeks
</h1>

<h2>test() Method</h2>


<p>
    String: GeeksforGeeks is the
    computer science portal for geeks.
</p>


<button onclick="geek()">
    Click it!
</button>

<p id="app"></p>


<script>
    function geek() {
        var str="GeeksforGeeks is the computer science"
            + " portal for geeks.";
        var regex = new RegExp("computer", );
        var rex = regex.test(str);

        document.getElementById("app").innerHTML
                = " Match " + " found: " + "<b>"
                + rex + "</b>";
    }
</script>

Output: 

JavaScript RegExp test() Method

Example 2: This example searches for the string “GEEK” in the original string. 

html

<h1 style="color:green">
    GeeksforGeeks
</h1>

<h2>test() Method</h2>


<p>
    String: GeeksforGeeks is the
    computer science portal for geeks.
</p>


<button onclick="geek()">
    Click it!
</button>

<p id="app"></p>


<script>
    function geek() {
        var str="GeeksforGeeks is the computer science"
                + " portal for geeks.";
        var regex = new RegExp("GEEK", );
        var rex = regex.test(str);

        document.getElementById("app").innerHTML
                = " Match " + " found: "
                + "<b>" + rex + "</b>";
    }
</script>

Output: 

JavaScript RegExp test() Method

Supported Browsers: The browsers supported by RegExp test() Method are listed below: 

• Google Chrome
• Apple Safari
• Mozilla Firefox
• Opera
• Internet Explorer

We have a complete list of Javascript RegExp expressions, to check those please go through this JavaScript RegExp Complete Reference article.

We have a Cheat Sheet on Javascript where we covered all the important topics of Javascript to check those please go through Javascript Cheat Sheet-A Basic guide to JavaScript.