JavaScript RegExp {X,Y} Quantifier

JavaScript RegExp {X,Y} Quantifier in JavaScript is used to find the match of any string that contains a sequence of m, X to Y times where X, Y must be numbered. 

// Matches between 2 and 4 digits
const regex = /\d{2,4}/;
console.log(regex.test("123"));
console.log(regex.test("12345"));
console.log(regex.test("12"));

true
true
true

Syntax

/m{X, Y}/ 
// or
new RegExp("m{X, Y}")

Syntax with Modifiers

/\m{X, Y}/g 
// or
new RegExp("m{X}", "g")

Example 1: Matching the presence of the word between [a-g] of length 3 to 4 in the whole string. 

let str = "GeeksforGeeeeks@_123_$";
let regex = /[a-g]{3,4}/gi;
let match = str.match(regex);

console.log("Found " + match.length
    + " matches: " + match);

Found 2 matches: Gee,Geee

Example 2: This example replaces the word 'ee' or 'eee' with '$'. 

let str = "ee@128GeeeeK";
let regex = new RegExp("e{2,3}", "gi");
let replace = "$";
let match = str.replace(regex, replace);
console.log(" New string: " + match);

 New string: $@128G$eK

Supported Browsers

• Chrome
• Safari
• Firefox
• Opera
• Edge

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.