<button
    nxButton="small secondary"
    (click)="toggle()"
    type="button"
    class="nx-margin-bottom-s"
>
    {{disabled ? 'en' : 'dis'}}able tooltip
</button>

<button
    nxButton
    [nxTooltipDisabled]="disabled"
    nxTooltip="This is a tooltip"
    type="button"
>
    I have a tooltip
</button>
