Check for mime-type and JS fun

www/main.js

@@ -0,0 +1,9 @@
+document.getElementById("click-me").addEventListener("click", function() {
+    let output = document.getElementById("output");
+
+    if (output.innerHTML != "") {
+        output.innerHTML = ""
+    } else {
+        document.getElementById("output").innerHTML = "Wow! This actually works.";
+    }
+});