<buttontype="button"class="btn btn-secondary"data-toggle="tooltip"data-placement="top"title="Tooltip on top">
Tooltip on top
</button><buttontype="button"class="btn btn-secondary"data-toggle="tooltip"data-placement="right"title="Tooltip on right">
Tooltip on right
</button><buttontype="button"class="btn btn-secondary"data-toggle="tooltip"data-placement="bottom"title="Tooltip on bottom">
Tooltip on bottom
</button><buttontype="button"class="btn btn-secondary"data-toggle="tooltip"data-placement="left"title="Tooltip on left">
Tooltip on left
</button>
<buttontype="button"class="btn btn-secondary"data-toggle="tooltip"data-html="true"title="<em>Tooltip</em> <u>with</u> <b>HTML</b>">
Tooltip with HTML
</button>