16.15: Typeahead Scrollable example
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**Primary Actor**: User

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

**Goal**: Show user options in drop-down can be scrollable

Main success scenario:
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1. User open Typeahead demo page
2. User clicks on Scrollable sub-menu
3. User sees typeahead input and typeahead card with "Model:" text
4. When there are any matches then a drop-down with a list of States matches is shown. The drop-down is limited to show 5 items and has a scroll
5. User is able to scroll down/up to see the matches list
6. When user clicks on any item in typeahead drop-down, then typeahead container auto-fills with a selected State

Variations:
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2*. User scrolls to Scrollable sub-menu