Resolving the Leave Site Prompt in Microsoft Edge for MVC5 Applications

Learn how to troubleshoot and fix the `Leave Site` message in Microsoft Edge when selecting options from dropdowns in MVC5 Razor applications. Get step-by-step guidance to prevent unnecessary page reloads and enhance user experience.
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This video is based on the question https://stackoverflow.com/q/70074309/ asked by the user 'user2073183' ( https://stackoverflow.com/u/2073183/ ) and on the answer https://stackoverflow.com/a/70160934/ provided by the user 'user2073183' ( https://stackoverflow.com/u/2073183/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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Resolving the Leave Site Prompt in Microsoft Edge for MVC5 Applications

When developing web applications using Microsoft's MVC5 framework and Razor syntax, developers can sometimes encounter frustrating issues that can disrupt user experience. One such issue is the irritating Leave Site? Changes you made may not be saved. message that pops up in Microsoft Edge when selecting an option from a dropdown menu. This guide will outline the problem at hand and provide an effective solution to tackle it, ensuring a seamless user experience.

Understanding the Problem

Imagine you have a web application where users can make selections from dropdown lists. In a scenario where users select a new option from the first dropdown, an input field should display, accompanied by an OK button, while a Save button is enabled. This works smoothly in Internet Explorer 11, but when using Microsoft Edge, a prompt appears asking the user if they want to leave the site, confused by the changes made.

Symptoms of the Issue

Dropdown Behavior: Selecting a value from the dropdown triggers unexpected behaviors such as a spinner that appears but without proper validation, leading users to believe they might lose potential changes.

Hidden Submit Button: The application contains a hidden submit button which triggers a JavaScript function on selection change, inadvertently causing browser warnings.

Code Implementation: Upon examining the code for the dropdown and the hidden submit button, it becomes evident that clicking this hidden submit button is equivalent to a postback, leading to the browser’s Leave Site message.

Solution Approach

Fortunately, there is a way to mitigate this issue by adjusting the JavaScript code to prevent the browser from prompting the user unnecessarily.

Step-by-Step Guide to Resolve the Issue

Disable Browser Warning: Utilize the following code within the change event of your dropdown. This prevents the browser from warning the user about unsaved changes:

[[See Video to Reveal this Text or Code Snippet]]

Trigger the Hidden Submit Button: After successfully disabling the warning, continue with triggering the hidden submit button as follows:

[[See Video to Reveal this Text or Code Snippet]]

Updated JavaScript Implementation

Incorporating the above steps, the revised JavaScript code may look like this:

[[See Video to Reveal this Text or Code Snippet]]

Benefits of This Approach

Improved User Experience: By preventing the browser message, users can navigate freely without fear of losing data, enhancing their experience.

Maintains Functionality: The process of validation and changing the state of buttons remains intact, ensuring the application behaves as expected.

Conclusion

Encountering issues with Microsoft Edge can be common for developers working with MVC5 and Razor applications. However, by implementing the aforementioned JavaScript fixes, it's possible to eliminate unnecessary prompts and create a smoother, more intuitive interface for users.

Next time you face the Leave Site message, consider the steps outlined here. Happy coding!

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