JavaScript RegExp * Quantifier

The RegExp m* Quantifier in JavaScript is used to find the match of any string that contains zero or more occurrences of m. 

Syntax: 

/m*/ 

or

new RegExp("m*")

Syntax with modifiers:

/\m*/g 

or

new RegExp("m*", "g")

Example 1: This example matches the zero or more occurrences of the word ‘e’ in the whole string. 

html

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

<h2>RegExp * Quantifier</h2>

<p>Input String: GeeksforGeeks@_123_G$</p>

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

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

<script>
    function geek() {
        var str1 = "GeeksforGeeks@_123_G$";
        var regex4 = /Ge*/gi;
        var match4 = str1.match(regex4);

        document.getElementById("app").innerHTML
                = "Found " + match4.length
                + " matches: " + match4;
    }
</script>

Output:

JavaScript RegExp * Quantifier

Example 2: This example replaces the occurrence of 128* with word “Geeky”. 

html

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

<h2>RegExp * Quantifier</h2>

<p>String: GEEK@128</p>

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

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

<script>
    function geek() {
        var str1 = "GEEK@128";
        var regex4 = new RegExp("128*", "gi");
        var replace = "Geeky";
        var match4 = str1.replace(regex4, replace);

        document.getElementById("app").innerHTML
                = " New string: " + match4;
    }
</script>

Output:

JavaScript RegExp * Quantifier

Supported Browsers: The browsers supported by RegExp * Quantifier 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.