Use Leaf's custom tooltips to indicate extra information when hovering over certain elements.
Bootstrap 4 documentationThe following custom tooltips are completely based on the ones used by Bootstrap 4. Here's a simple example:
<button type="button" class="btn btn-secondary btn-sm" data-toggle="tooltip" title="Tooltip text">
Tooltip
</button>
By specifying data-placement
you can set the placement of the tooltip when it shows up.
<button type="button" class="btn btn-secondary btn-sm" data-toggle="tooltip" data-placement="top" title="Tooltip on top">
Tooltip on top
</button>
<button type="button" class="btn btn-secondary btn-sm" data-toggle="tooltip" data-placement="right" title="Tooltip on right">
Tooltip on right
</button>
<button type="button" class="btn btn-secondary btn-sm" data-toggle="tooltip" data-placement="bottom" title="Tooltip on bottom">
Tooltip on bottom
</button>
<button type="button" class="btn btn-secondary btn-sm" data-toggle="tooltip" data-placement="left" title="Tooltip on left">
Tooltip on left
</button>
Of course you can change the styles of the element you place the tooltip on. Here are a few examples:
<button type="button" class="btn btn-primary btn-sm" data-toggle="tooltip" data-placement="top" title="Tooltip on top">
Tooltip on top
</button>
<button type="button" class="btn btn-outline-secondary btn-md" data-toggle="tooltip" data-placement="right" title="Tooltip on right">
Tooltip on right
</button>
<button type="button" class="btn btn-tertiary btn-round btn-sm" data-toggle="tooltip" data-placement="bottom" title="Tooltip on bottom">
Tooltip on bottom
</button>
<button type="button" class="btn btn-primary btn-md" data-toggle="tooltip" data-placement="left" title="Tooltip on left">
Tooltip on left
</button>