8.1: Pagination basic examples
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 **Primary Actor**: User 
 
 **Scope**: Ngx-bootstrap DEMO / BS version 3&4
 
 **Goal**: Show user basic pagination functionality
 
 Main success scenario:
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 1. User opens Pagination demo page
 2. User clicks on Basic sub-menu
 3. By default 1st page is active, and previous button is disabled
 4. When user clicks on 3rd page, then next button is disabled, previous button is enabled, 1st page is inactive 
 and 3rd is active
 5. After click on 2d page, previous and next buttons are enabled, 2d page is active, other pages is inactive
 
 Variations:
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 2*. User scrolls to "Basic"