ocument.querySelectorAll('#list-click-once li')
      addListener(listTwo, ['click'], (e) => {
        console.log(`Clicked "${e.target.innerText}". Fired only once`, e.target)
        incrementCount(e)
        window.liClickOnceCount = window.liClickOnceCount + 1 // for tests
      }, { once: true });
      </script>

      <div>
        <h3>Click `once` EVER via function on multiple <code>li</code></h3>
        <ul id='click-list-once-ever'>
          <li>Only one of these.</li>
          <li>List items c