Views Exposed Filters Form with custom Twig template

How override/customize/theme Drupal Views Exposed Filters form with a custom Twig template? Easy! Real working tutorial. Step by step in 5 mins.

Theme a form in drupal 8 and/or 9

How render/override/customize/theme any drupal form with and without a custom template? Easy!

drupal + view + isotope + infinitescroll

Now I'll quickly show you how to implement such functionality in your custom theme using View only without any additional contrib module. And of course, we want to add support for ajax infinitescroll reload. Let's go...