ERROR TypeError: Cannot read property 'isEventFrom'

Bug description:

Hello world. since i update the version of ng boostrap from 1.0.0 to 1.1.2 I have an error in my web console.

Link to minimally-working plunker that reproduces the issue:

I have issue on this piece of code:

<div ngbDropdown class="dropdown" #myDropGlobal="ngbDropdown">and <div ngbDropdown class="dropdown"> wich seems good.

Version of Angular, ng-bootstrap, and Bootstrap:

Angular: 5

ng-bootstrap: 1.1.2

Bootstrap: 4.0.0-beta

[MariMax]

@pkozlowski-opensource thanks for the clarification, in our case ngbDropdownToggle was available only after ngbDropdown was created, wrong code snippet bellow

      <div ngbDropdown>
        <button ngbDropdownToggle *ngIf="showButton()">Btn</button>
        <ul ngbDropdownMenu>
          <li *ngFor="let item of items">
            <button (click)="actionOnItem(item)">{{item.name}}</button>
          </li>
        </ul>
      </div>

[sscots]

I’ve determined the error appears when applying an *ngIf to the “ngbDropdownToggle” element