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Resolve issues with form submissions when using multiple dropdowns with the same name. Learn how to target the correct dropdown using AJAX and jQuery for seamless data handling.
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This video is based on the question https://stackoverflow.com/q/64301355/ asked by the user 'RK Ahir' ( https://stackoverflow.com/u/7688114/ ) and on the answer https://stackoverflow.com/a/64301837/ provided by the user 'Swati' ( https://stackoverflow.com/u/10606400/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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How to Submit a Specific Dropdown Value with AJAX and jQuery in HTML Forms

In web development, working with forms is a common task, and managing multiple dropdowns can sometimes lead to unexpected behavior, particularly when they share the same name. If you've faced an issue where selecting a specific dropdown doesn't submit the desired value, you're not alone.

The Problem

Imagine you have a shipping address form that features country and state dropdowns. However, there's a challenge: both dropdowns have the same name and can produce conflicting values during submission. Specifically, you're filling states based on the selected country, but the wrong state's value is being submitted. Instead of getting the selected state's value, the form sends a default value, which is not what you want.

Example Scenario

Here's a brief overview of the situation:

You have two dropdowns with the same name cbo_state.

One dropdown (before_get_state) displays default options, while the other (after_get_state) updates the choices based on user selection.

Upon form submission, the value sent by AJAX is not from the after_get_state dropdown but defaults to the first dropdown’s value, which is usually a placeholder like 0.

The Solution

To ensure that you submit the correct value from the dropdown in the after_get_state div, we'll use jQuery to check which dropdown is populated and send the appropriate state value.

Step 1: Check for the Dropdown's Existence

Before submitting the form, you should check if the dropdown inside the after_get_state div exists and is populated.

Code Snippet

Here’s how you can implement this check in your JavaScript:

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

Step 2: Adjust the AJAX Submission

Now that you have identified which value to submit, you can modify the AJAX request accordingly. Ensure that during the form submission, the data variable passes the correct value.

Example AJAX Submission

Integrate the retrieved state value into your AJAX call:

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

Complete Demo Code

Putting this all together, your script might look something like this:

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

Conclusion

By effectively checking for the current state dropdown's existence and updating your AJAX submission logic, you can successfully handle multiple dropdowns with the same name without running into conflicts. This results in a more efficient and user-friendly form experience.

Next time you face struggles with dropdown submissions, remember to target the specific dropdown that contains the desired value!