Javascript | Window confirm() Method

The confirm() method is used to display a modal dialog with an optional message and two buttons, OK and Cancel. It returns true if the user clicks “OK”, and false otherwise. It prevents the user from accessing other parts of the page until the box is closed.

Syntax:

confirm(message)

message is the optional string to be displayed in the dialog.

It returns a boolean value indicating whether OK or Cancel was selected (true means OK and false means that the user clicked cancel).
Example-1:

filter_none

edit
close

play_arrow

link
brightness_4
code

<!DOCTYPE html>
<html>
  
<head>
    <title>
        Window confirm() Method
    </title>
</head>
  
<body style="text-align: center;">
    <h1 style="color:green;">
            GeeksforGeeks
        </h1>
    <h2>
            Window confirm() Method
        </h2>
    <p>Click the button to display a confirm box.</p>
  
    <button onclick="geek()">Click me!</button>
  
    <script>
        function geek() {
            confirm("Press OK to close this option");
        }
    </script>
</body>
  
</html>

chevron_right


Output:
Before clicking the button:
confirm

After clicking the button:
confirm

Example-2:

filter_none

edit
close

play_arrow

link
brightness_4
code

<!DOCTYPE html>
<html>
  
<head>
    <title>
        Window confirm() Method
    </title>
</head>
  
<body style="text-align: center;">
    <h1 style="color:green;">
            GeeksforGeeks
        </h1>
    <h2>
            Window confirm() Method
        </h2>
  
    <button onclick="geek()">Click me!</button>
  
    <p id="g"></p>
  
    <script>
        function geek() {
            var doc;
            var result = confirm("Press a button!");
            if (result == true) {
                doc = "OK was pressed.";
            } else {
                doc = "Cancel was pressed.";
            }
            document.getElementById("g").innerHTML = doc;
        }
    </script>
</body>
  
</html>

chevron_right


Output:
Before clicking the button:
confirm
After clicking the button:
confirm

Supported Browsers: The browser supported by window confirm() method are listed below:

  • Google Chrome
  • Internet Explorer
  • Firefox
  • Opera
  • Safari


My Personal Notes arrow_drop_up


If you like GeeksforGeeks and would like to contribute, you can also write an article using contribute.geeksforgeeks.org or mail your article to contribute@geeksforgeeks.org. See your article appearing on the GeeksforGeeks main page and help other Geeks.

Please Improve this article if you find anything incorrect by clicking on the "Improve Article" button below.