how to select the clicked element with "data-featherlight" if there are more than one?

[musicjunk]

Is there a way to select the element (button) that opend the lightbox?
I've several buttons to open the lightbox always with the same content.

<div class="div1">AAA</div>
<button><a class="" data-featherlight="#modalForm" >open 1</a></button>
</div>
<div class="div1">BBB</div>
<button><a class="" data-featherlight="#modalForm" >open 2</a></button>
</div>

Now I want to add the Text "AAA" or "BBB" to the content of #modalForm.
To select the right one, I need to know witch button was clicked. How can $(this) button be selected?

I've testet with current but I guess this holds the opend lightbox not $(this) clicked button.