How to Add Blank Space in String in Javascript

In this tutorial, you will learn how to add blank space in string in javascript. A string is composed of different characters. If a string begins or ends with a space, it may or may not have a clear significance. For a newbie developer, it can be a bit tricky to add blank space in a string.

There are numerous ways to add blank space in a string. But for the sake of simplicity, we will make use of addition operator (+) which helps in concatenating two individual strings and repeat() method which will return a new string that has certain number of copies of a string.

In the following example, we have one global variable that holds a string. Upon click of a button, we will add blank space in a string and display the result on the screen.  Please have a look over the code example and the steps given below.


  • We have 3 elements in the HTML file (div, button, and h1). The div element is just a wrapper for the rest of the elements.
  • The innerText for the button element is “Add” and for the h1 element, it 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">


  <div class="container">    

  <script src="script.js"></script>

.container {        
    text-align: center;

button {
  margin-top: 10px;
  padding: 10px 20px;


  • We have selected the button element and h1 element using the document.querySelector() method and stored them in btnAdd and output variables respectively.
  • We have a global variable myString which holds a string as its value.
  • We are displaying myString in the h1 element using innerText property.
  • We have attached a click event listener to the button element.
  • In the event handler function, we have a single empty space stored in the mySpace variable. We are using repeat() method and passing it 2 as a parameter. As a result, it will return 2 spaces.
  • We are adding it to the myString at the beginning and the end using addition operator (+).  Now, we have 2 blank spaces at the beginning and the end.
  • We are storing the final string in the result variable. It will not be clearly visible in the HTML document, but you can check developer console window in Chrome to see the actual output.
  • We are displaying the result in the h1 element using the innerText property.
let btnAdd = document.querySelector("button");
let output = document.querySelector("h1");

let myString = `The truck is moving very fast`;
output.innerText =  myString;
btnAdd.addEventListener("click", () => {  
  let mySpace = " "
  let result = mySpace.repeat(2) + myString + mySpace.repeat(2);
  output.innerText = result;