Fix bug that deleted event handlers on input boxes

media/main.js

@@ -151,10 +151,10 @@
                 break;
             }
         }
-		constantsUl.innerHTML = constantsUl.innerHTML === ""
-			? "There are no undefined constants."
-			: constantsUl.innerHTML;
 
+        if (constantsUl.innerHTML === "") {
+            constantsUl.innerHTML = "There are no undefined constants.";
+        }
 
         vscode.setState({ tools: oldState.tools, constants: constants, options: oldState.options, currentUri: uri });
     }