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. 

Javascript

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

    console.log("Found " + match4.length
        + " matches: " + match4);
}
geek();

Output

Found 3 matches: Gee,Gee,G

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

Javascript

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

    console.log(" New string: " + match4);
}
geek();

Output

 New string: GEEK@Geeky

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.