Tooltips

<button type="button" class="btn btn-secondary" [tooltip]="'Tooltip on top'" tooltipPlacement="top">
  Tooltip on top
</button>
<button type="button" class="btn btn-secondary" [tooltip]="'Tooltip on right'" tooltipPlacement="right">
  Tooltip on right
</button>
<button type="button" class="btn btn-secondary" [tooltip]="'Tooltip on bottom'" tooltipPlacement="bottom">
  Tooltip on bottom
</button>
<button type="button" class="btn btn-secondary" [tooltip]="'Tooltip on left'" tooltipPlacement="left">
  Tooltip on left
</button>
        

  Ng2BootstrapModule has to be imported