fix: detect unexpected item to stringify

electrode-io · Apr 9, 2020 · 7228817 · 7228817
1 parent d20e7e2
commit 7228817
Showing 1 changed file with 6 additions and 1 deletion.
diff --git a/packages/electrode-react-webapp/lib/render-output.js b/packages/electrode-react-webapp/lib/render-output.js
@@ -23,8 +23,13 @@ class Output {
     for (const x of this._items) {
       if (typeof x === "string") {
         out += x;
-      } else {
+      } else if (x && x.stringify) {
         out += x.stringify();
+      } else {
+        const typeName = (x && x.constructor && x.constructor.name) || typeof x;
+        const msg = `SpotOutput unable to stringify item of type ${typeName}`;
+        console.error("FATAL Error:", msg + "\n"); // eslint-disable-line
+        throw new Error(msg);
       }
     }
     return out;