Make a header of a view page to appear only in the view's first page

Question

I have a view-page with a pager of about 10 pager-pages.

This view also has a a view-header. The text of this header repeats itself in all pager-pages of that view, which is a bit funny because in page 2 or even in page 10 the user could read the same header text "welcome to my blog".

How to make a header of a view page to appear only in the view's first page?

Answer 1

You can use hook_preprocess_views_view__HOOK() hook (in .module/theme file) for display header conditionally:

function Mymodulename_preprocess_views_view__machine_name_of_view(&$vars) {
  $view = $vars['view'];
  $pager_number = $view->pager->current_page;
  // current page key value start from 0 
  // Added condition header should display only for first page
  if($pager_number != 0){
     unset($vars['header']);
  }
}  

Answer 2

Install the Filter Twig module:

composer require 'drupal/filter_twig:^2.2'
drush en filter_twig

Visit /admin/config/content/formats/add, enter the name "Views Twig", check "Replaces Twig value" and save.

In the View add a Header: Global: Text area, select the text format Views Twig and fill in the text:

{% if [view:current-page] == 1 %}
  Page 1
{% endif %}