Javascript Confirm Method

Javascript is the most known language of the web. Javascript is widely used in front-end development as well as in the back-end. Javascript provides a lot of built-in objects, functions, and methods to help in web development. In this article, we are going to learn one of the javascript’s built-in confirm() method, which is used to show pop-ups over the screen and get the user’s response. The confirm box is a bit different if we try to compare it with the alert box. It is a pop-up that contains a message/text with two buttons, “OK” and “Cancel”. The user won’t be able to do any task while a confirm box is over the screen, and he/she clicks the “OK” or “Cancel” button. This is the reason behind not recommending it’s often used. So, let’s have a look at what is a confirm box and what are the different ways to use it.

The confirm() is basically a method, which is used to show a pop-up box over the web page, and it contains a message or text and two buttons, “OK” & “Cancel”. On the click of the “OK” button, the confirm method returns “true”. Similarly, on the click of the “Cancel” button, it returns false.


There are two different syntaxes for showing the confirm box. One of them is using the window’s object


But, we can use the confirm() method without the window’s object as well.


In this syntax, the message can be any string or a variable that can include a message.
So, let’s try both of the syntaxes.


First, let’s try with the window’s object

window.confirm("Confirm message from Linuxhint");

And now without window’s object

confirm("Confirm message from Linuxhint");

You will witness that there is no difference in both of them.

The confirm method doesn’t only take the string to show the message. We can provide variable as well, and it worked perfectly fine.

var confirmMessage = Confirm Message using variable';

As you can see in the screenshot below that the message is displayed.

We have learned about providing a variable as well. What if we want to show the pop-up alert box on the screen at the click of a button. For example, we have got some information from the user, and after successfully saving the user’s data on the server, we want to show a confirmation message that “Confirmed”. So, we can simply show a confirmation box like this.

<button>Show Confirm Box!</button>

Or if we are getting a confirmation message from the server, and we want to show the message on the base of the message we got. We can call the function on the button’s onClick method.

<button>Show Confirm Box!</button>

And later in the script, we can write the function in which we can show the confirmation message.

function confirmFunc() {
 var confirmMessage = 'Confirm Box using function';

So, these are some of the different methods of using the confirm() method.


In this article, we have learned about the javascript’s built-in confirm method to show pop-up over the browser’s window. This article has explained the use of the confirm method in a very easy, profound, and effective way that any beginner can understand it and use it. So, keep on learning, working, and getting experience in javascript with to have a better grasp over it. Thank you so much.

About the author

Shehroz Azam

Shehroz Azam

A Javascript Developer & Linux enthusiast with 4 years of industrial experience and proven know-how to combine creative and usability viewpoints resulting in world-class web applications. I have experience working with Vue, React & Node.js & currently working on article writing and video creation.