In this article I will explain with an example, how to disable
Browser Back Button after Logout using
JavaScript in ASP.Net MVC.
One cannot disable the Browser Back Button functionality only thing that can be done is prevent them.
Concept
In this article, two Views are used i.e. Logout and Home. After Logout, User is sent to Home View and he will be prevented from going back to Logout View using Browser Back Button.
Disable Browser Back Button using JavaScript function
The following
JavaScript function must be placed inside the View where you want to prevent the User from coming back using
Browser Back Button.
For example, consider two Views, Logout and Home and once User lands on the Logout View you would not want him to go to Home View. Thus, the following script must be placed inside the Home View.
Inside the preventBack function, the window.history.forward() method is called which navigates the browser forward one step in their history. Whenever Browser Back Button is clicked, this function immediately moves it one step forward.
The setTimeout method schedules the execution time of the preventBack function with delay of 0 (zero) milliseconds.
Finally, the window.onunload function returns NULL.
<script type="text/javascript">
function preventBack() {
window.history.forward();
}
setTimeout("preventBack()", 0);
window.onunload = function () {
null;
};
</script>
Controller
The Controller consists of following Action Methods.
Action method for handling Home GET operation
This Action method gets called when Home View is refreshed.
Action method for handling Login GET operation
This Action method gets called when the Anchor Link of Home View is clicked or Logout View is refreshed.
public class HomeController : Controller
{
// GET: Home
public ActionResult Home()
{
return View();
}
// GET: Logout
public ActionResult Logout()
{
return View();
}
}
Disable Browser Back Button implementation
HTML Markup
Home View
The Home View consists of an HTML Anchor tag and its href property is set to name of Logout View.
Finally, the script to disable the Browser Back Button is placed inside the HEAD section.
@{
Layout = null;
}
<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="width=device-width" />
<title>Home</title>
<script type="text/javascript">
function preventBack() {
window.history.forward();
}
setTimeout("preventBack()", 0);
window.onunload = function () {
null;
};
</script>
</head>
<body>
<h3>Home</h3>
<hr />
<a href="/Home/Logout">Logout</a>
</body>
</html>
Logout View
The Logout View consists of a H3 tag which displays the message that, this is Logout page.
@{
Layout = null;
}
<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="width=device-width" />
<title>Logout</title>
</head>
<body>
<h3>Logout</h3>
</body>
</html>
Screenshot
![ASP.Net MVC: Disable Browser Back Button after Logout using JavaScript]()
Browser Compatibility
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Demo
Downloads
