getSpecificEl.js

// example HTML
<div class="container">
  <div data-example="100">
    <div class="some-div">
      <span>Some text</span>
    </div>
  </div>
  <div data-example="200">
    <div class="some-div">
      <span>Some text</span>
    </div>
  </div>
  <div data-example="200">
    <div class="some-div">
      <span>Some text</span>
    </div>
  </div>
</div>

// set event listener on container
let container = document.querySelector('.container');

container.addEventListener('click', function(event) {
 let target = event.target;
 while(true) {
  if(target.getAttribute('data-example') || target.parentNode === null) {
   break; 
  } else {
   target = target.parentNode; 
  }
 } 
  
  // now 'target' is the node I want
});