Can we use it on table to drag a tr?

[code2prog]

yes. replace tbody wrap with draggable component like this:

<draggable v-model="array" tag="tbody" handle=".handle" @change="orderChanged">
                <tr v-for="elem in array">
<td><span class="handle">handle</span></td>
<td></td>
</tr>
</draggable>