Submit HTML form on self page

Question

I want an HTML form to submit to itself. How do I use the action attribute?

Answer 1

In 2013, with all the HTML5 stuff, you can just omit the 'action' attribute to self-submit a form

Actually, the Form Submission subsection of the current HTML5 draft does not allow action="" (empty attribute). It is against the specification.

From this other Stack Overflow answer.