I am trying to post data using AJAX.
The docs describes a method here. But that is mainly for jQuery.
I have also looked at this url, which also uses jQuery.
But from what I understand, the "action" parameter in <input type="hidden" name="action" value="freeform/api/form">is where the data is sent. But if I send data to that URL, I get a 404.
How do I properly submit a form using AJAX?
From the action you are currently posting to a controller see here
The example shows that in your case it would be looking for a plugin called "Freeform" with a controller named "api" and then within that controller there would need to be a "form" action. If this isn't there then the page will return a 404 or error as it cannot find the route.
You may be able to create the same thing without using jQuery with something like this method
