let divs = document.querySelectorAll("a.dropdown-item")
for (let el of divs) {
el.addEventListener("onClick", result())
}
function result(){
console.log(el.dataset.price)
}<div class="dropdown">
<button class="btn btn-secondary dropdown-toggle" type="button" id="dropdownMenuButton" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
Dropdown button
</button>
<div class="dropdown-menu" aria-labelledby="dropdownMenuButton">
<a class="dropdown-item" href="#" data-price="100">Action</a>
<a class="dropdown-item" href="#" data-price="200">Another action</a>
<a class="dropdown-item" href="#" data-price="300">Something else here</a>
</div>
</div>