How to Submit AJAX Form After Validation in JavaScript

Learn how to submit an AJAX form effectively after validating it with Bootstrap 5. This step-by-step guide is designed for developers with basic JavaScript knowledge.
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This video is based on the question https://stackoverflow.com/q/72756191/ asked by the user 'Holger' ( https://stackoverflow.com/u/2928072/ ) and on the answer https://stackoverflow.com/a/72756359/ provided by the user 'IT goldman' ( https://stackoverflow.com/u/3807365/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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How to Submit AJAX Form After Validation in JavaScript

Submitting an AJAX form after performing validation is a common requirement in web development. However, for many beginner developers, this can be a confusing task, especially when using frameworks like Bootstrap 5 for input validation. If you've encountered issues with forms submitting without fully validating or having to press the submit button twice, you're not alone.

In this guide, we will break down the problem and provide a clear solution to ensure that your form only submits through AJAX after successfully passing all validations.

The Problem

When you set up an AJAX form submission while also utilizing Bootstrap 5’s validation, you may find that:

The form submits even when some fields are not filled out.

You need to click the submit button twice for the form to submit correctly.

This can be frustrating, especially if you're still getting acquainted with JavaScript and jQuery. The core issue is how you're structuring your JavaScript validation and AJAX submission.

Understanding the Solution

Step-by-step Breakdown

To ensure your form validates correctly before submission, you need to adjust your JavaScript code. Here’s how to do it effectively:

Prevent Default Submission: Check the validity of the form before allowing it to be submitted.

Capture Form Data: If the form is valid, gather the necessary data for your AJAX request.

Perform AJAX Submission: Only proceed with the AJAX submission if the validation checks out.

Updated JavaScript Code

Here’s the corrected version of your JavaScript code:

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

Key Improvements

Removed the need for a double click on "Submit" by returning early if validation fails.

Gathered form data directly after validation, thus spelling out the form submission process clearly and effectively.

Ensured to prevent native form submission until all checks are correctly completed.

Conclusion

Implementing AJAX form submission after validation doesn't have to be a daunting task—even for those with limited JavaScript knowledge. By applying the structured approach outlined in this guide, you can ensure that your forms validate successfully before sending any data through AJAX.

With this corrected code, your form will not only validate but also submit as intended the first time you click the button. This will lead to a smoother user experience and cleaner, more functional code. Happy coding!