Make it a little cleaner for the puzzle writer

example-puzzles/example/5/helpers.js

@@ -61,8 +61,8 @@ function helperExpandInputs(e) {
 
 function helperActivate(e) {
   e.addEventListener("input", helperUpdateAnswer)
-  if (e.classList.contains("expand")) {
-    e.addEventListener("click", helperExpandInputs)
+  for (let exp of e.querySelectorAll(".expand")) {
+    exp.addEventListener("click", helperExpandInputs)
   }
 }
 

example-puzzles/example/5/puzzle.moth

@@ -34,7 +34,7 @@ Multiple concatenated values
 Free input, sorted, concatenated values
 <ul class="answer lower sort">
   <li><input></li>
-  <li><button class="answer expand">➕</button><li>
+  <li><button class="expand">➕</button><li>
 </ul>
 
 Select from an ordered list of options