Forms are an essential part of my website design, and I often find myself contemplating whether it's better to submit a form using a standard submit button or utilizing Ajax. Typically, I opt for Ajax to prevent the dreaded issue of form re-submission, which can result in duplicate rows being inserted into the database and lead to various complications. While I am aware that I could avoid this concern by using the preventDefault method on a form submission triggered by a submit button, I prefer the efficiency of Ajax.
Submitting a form with a regular submit button means including the PHP file responsible for processing the form data within the same file as the HTML form itself. This approach seems impractical to me since it forces the user's browser to parse through potentially irrelevant code in the PHP file, even if the user hasn't submitted the form triggering said code. I believe this method could slow down the loading time of the website unnecessarily.
So, what are your thoughts on this dilemma?