6.1: Dropdowns basic example
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**Primary Actor**: User

**Scope**: Ngx-bootstrap DEMO / BS version 3&4

**Goal**: Show user basic dropdowns functionality

Main success scenario:
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1. User opens Dropdowns demo page
2. User clicks on Basic sub-menu
3. User see "Button dropdown" and able to click on it
4. When user clicks on "Button dropdown", then dropdown opened and there are 4 items, 1 of them is separated
5. When user clicks on any item, then dropdown closes

Variations:
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2*. User scroll to Basic sub-menu