7.9: Modals service examples esc closing option
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**Primary Actor**: User  

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

**Goal**: Show user esc closing option functionality

Main success scenario:
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1. User opens "Modals" demo page
2. User clicks on "Esc closing option" sub-menu
3. When user clicks on "Enable Esc" button, title of button should change to "Disable Esc"
4. And after that click on "Open modal" button, modal popup is opened
5. When user closes modal popup by click ESC, modal popup is closed
6. When user clicks on "Disable Esc" button, title of button change to "Enable Esc"
7. And after that click on "Open modal" button, modal popup is opened
8. When user closes modal popup by click ESC, modal popup is opened

Variations:
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2*. User scrolls to "Esc closing option"