Pull class from tree. Parsing dom?

Question

Parsing

Good day! Please help!
For example, there is this code:

<div class="lol">
<div class="lol2">
<div class="lol3">
</div>
</div>
</div>

Question: How to pull content with js class lol3 ?
There is no possibility to connect id. Because these blocks are loaded by a third-party widget.

Answer 1

document.getElementsByClassName("lol3");