How to Get Number of Characters in a String in Javascript


In the following example, we have one input element.  We will simply enter any random string in it and upon click of a button, we will get its length and display that on the screen.  Please have a look over the code example and steps given below.    


  • We have 4 elements in the HTML file (div, input, button, and h1). The div element is just a wrapper for the rest of the elements.
  • The inner text for the button element is “Get” and for the h1 element is “Result”.
  • We have done some basic styling using CSS and added the link to our style.css stylesheet inside the head element.
  • We have also included our javascript file script.js with a script tag at the bottom.
<!DOCTYPE html>
<html lang="en">
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <link rel="stylesheet" href="style.css">
        <input type="text">
    <script src="script.js"></script>
body {
    text-align: center;

div {
    display: inline-block;

input, button {
    display: inline-block;
    padding: 10px 20px;


  • We have selected the button, input, and h1 elements using the document.querySelector() method and stored them in btnGet, input, and result variables respectively.
  • We have attached the click event listener to the button element.
  • Inside the event handler function, we are getting string entered in the input element using its value property and getting the total number of characters in a string using its length property.
let btnGet = document.querySelector('button');
let input = document.querySelector('input');
let result = document.querySelector('h1');

btnGet.addEventListener('click', () => {
    result.innerText = input.value.length;