JavaScript RegExp test() Method

The RegExp test() method is used to test if a match occurs in a string or not. If the match occurs then it returns true otherwise false.

Following is the code for RegExp test() method −


 Live Demo

<!DOCTYPE html>
<html lang="en">
<meta charset="UTF-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
body {
   font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
div {
   font-size: 20px;
   font-weight: 500;
<h1>JavaScript RegExp test() method</h1>
<div class="sample">The quick brown fox jumps over the lazy dog</div>
<button class="Btn">CLICK HERE</button>
<div class="result"></div>
<h3>Click on the above button to check if the above string contains 'fox'.</h3>
let fillEle = document.querySelector(".sample");
let result = document.querySelector(".result");
let regex = new RegExp("fox");
let regResult = regex.test(fillEle.innerHTML);
document.querySelector(".Btn").addEventListener("click", () => {
   if (regResult) result.innerHTML = "The above string contains fox";
   else result.innerHTML = "The above string doesn't contain fox";


On clicking the “CLICK HERE” button −

Updated on: 06-May-2020


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