Select the last element that is not empty (innerText !== "") of a class with querrySelector

Question

I'm try to select the last element that is not empty of a class.

For exemple, here I'would like to select the second element :

<span class="test">A</span>
<span class="test">B</span>
<span class="test"></span>
<span class="test"></span>

But because the innerText changes (with the actions of the user), I can't just use

document.querySelector(".test:nth-of-type(2)");

I've tried this but it doesn't work :

document.querySelector('.test:not(:empty):nth-last-of-type(1)');

function myFunction(){
  document.querySelector('.test:not(:empty):nth-last-of-type(1)').innerText = "test";
}

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>

<span class="test">A</span><br>
<span class="test">B</span><br>
<span class="test"></span><br>
<span class="test"></span><br>

<input type="button" value="change 2nd element" onclick="myFunction()"/>

Answer 1

Why use querySelector for this? I would suggest this:

document
  .querySelectorAll('.test') // all with test class
  .filter(elem => elem.innerText !== '') // only not empty
  .at(-1) // last element

// or, if you need backward browser compatibility:
document
  .querySelectorAll('.test') // all with test class
  .filter(elem => elem.innerText !== '') // only not empty
  .reverse()[0]