feat: make help modal disappear if you click outside it

Author: r00ster91

lib/docs/main.js

@@ -132,6 +132,12 @@ var zigAnalysis;
     location.hash = "#root";
   }
 
+  // make the modal disappear if you click outside it
+  domHelpModal.addEventListener("click", ev => {
+    if (ev.target.className == "help-modal")
+      domHelpModal.classList.add("hidden");
+  })
+
   window.addEventListener("hashchange", onHashChange, false);
   window.addEventListener("keydown", onWindowKeyDown, false);
   onHashChange();