<div class="lv1" data-id="ae35e67d" data-parent-id="">
1. Title1
<div class="lv2" data-id="bd01cc50" data-parent-id="ae35e67d">1.3. Title1.1</div>
<div class="lv2" data-id="7f66a92d" data-parent-id="ae35e67d">1.4. Title1.2</div>
</div>
How do I append the data below to above
<div class="lv2" data-id="e7c2dbcc" data-parent-id="ae35e67d">1.1. Title1.3</div>
<div class="lv2" data-id="cc784c42" data-parent-id="ae35e67d">1.2. Title1.4</div>
The result will be like
1. Title1
1.1. Title1.1
1.2. Title1.2
1.3. Title1.3
1.4. Title1.4
As you can see the data all have "data-id" and "lv2 parent- id" will be lv1's data-id.