ng-bootstrap Open on focus input field css not working

Question

I have used ng Typeahead Open on focus input , my conflict is that they are using bootstrap-4 but I have used bootstrap 3 for my project , bootstrap 3 for that Open on focus is not working properly ,any one know how to make that work on bootstrap 3?

html

<input
  id="typeahead-focus"
  type="text"
  class="form-control"
  [(ngModel)]="model"
  [ngbTypeahead]="search"
  (focus)="focus$.next($event.target.value)"
  (click)="click$.next($event.target.value)"
  #instance="ngbTypeahead"
/>

stackblitz code here

Answer 1

Just add below css in your style.css and your item will shown good as example :

.dropdown-item {
	display: block;
	width: 100%;
	padding: .25rem 1.5rem;
	clear: both;
	font-weight: 400;
	color: #212529;
	text-align: inherit;
	white-space: nowrap;
	background-color: transparent;
	border: 0
}

.dropdown-item:focus,
.dropdown-item:hover {
	color: #16181b;
	text-decoration: none;
	background-color: #f8f9fa
}

.dropdown-item.active,
.dropdown-item:active {
	color: #fff;
	text-decoration: none;
	background-color: #007bff
}

.dropdown-item.disabled,
.dropdown-item:disabled {
	color: #6c757d;
	background-color: transparent
}

.dropdown-menu.show {
	display: block
}

.dropdown-header {
	display: block;
	padding: .5rem 1.5rem;
	margin-bottom: 0;
	font-size: .875rem;
	color: #6c757d;
	white-space: nowrap
}