[Meta] Improve documentation for Render and Form Elements

This page used to be a useful partial list of element types

Form and render elements - 9.5.x - drupal
https://api.drupal.org/api/drupal/elements/9

But in version 10 it is reduced to one type, Component. Version 11 splurges on two types, Component and Ajax.

If there was some kind of link to some other place to find the information that would be one thing. This is subpar.

For me, the most important missing documentation is that we need a Drupal 10/11 version of the Drupal 7 "Form API Reference" page. Perhaps this is done as more than one page, but somewhere there needs to be list of valid values for #type and a way to find out what properties can be used with each type.

The link to the template in the issue summary is a 404.

Related issues are in the sidebar