I try this
<td>
<button type="button" class="btn btn-default" data-toggle="tooltip" data-placement="top" data-placement="top" title="<span class="badge badge-pill badge-primary">15</span>">
<i class="fas fa-list-alt"></i>
</button>
</td>
But I only got the '<span class="badge badge-pill badge-primary">15</span>' not html badge?
How can I put the html in the tooltip title?
I try the data-html="ture" but still fail! I want to make the final purpose is
<td>
<button type="button" class="btn btn-default" data-toggle="tooltip" data-html="ture" data-placement="top" data-placement="top" title="<span class="badge badge-pill badge-primary">15</span><span class="badge badge-pill badge-secondary">16</span><span class="badge badge-pill badge-warning">17</span>">
<i class="fas fa-list-alt"></i>
</button>
</td>
I just got the tooltip for one badge
https://jsfiddle.net/housekeepings/rm0uade9/32/
<html>
<body>
<table id="table_id" class="display">
<thead>
<tr>
<th>
head1
</th>
<th>
head2
</th>
<th>
head3
</th>
</tr>
</thead>
<tbody>
<tr>
<td>
see1
</td>
<td>
<div class="btn-group">
<button type="button" class="btn btn-default" data-toggle="tooltip" data-html="true" data-placement="top" title="<span class="badge badge-pill badge-primary">10</span>"
>
<i class="fas fa-list-alt"></i>
</button>
</div>
</td>
<td>
<div class="btn-group">
<button type="button" class="btn btn-default" data-toggle="tooltip" data-html="true" data-placement="top" title="<em>Tooltip</em> <u>with</u> <b>HTML</b>">
<i class="fas fa-list-alt"></i>
</button>
</div>
</td>
<td>
<div class="btn-group">
<button type="button" class="btn btn-default" data-toggle="tooltip" data-html="true" data-placement="top" title="Something with badge <span class='badge badge-primary'>12</span>">
<i class="fas fa-list-alt"></i>
</button>
</div>
</td>
</tr>
</tbody>
</table>
</body>
</html>