Namespacing forms in Craft CMS
If you want to use specific HTML form in multiple parts of a single page - to avoid potential problems you need to use "namespace" Twig tag.
#Templating
Using attr() function to render HTML attributes in Craft CMS
Craft CMS 3.2 introduces new Twig function - attr(). It can be used to render HTML attributes from arrays of data. Learn how to use it to make your templates cleaner and easier to maintain.