Fix eslint

package.json

@@ -29,22 +29,21 @@
     "test": "lerna run test"
   },
   "devDependencies": {
-    "@typescript-eslint/eslint-plugin": "^4.2.0",
-    "@typescript-eslint/parser": "^4.2.0",
-    "eslint": "^7.10.0",
-    "eslint-config-prettier": "^6.15.0",
-    "eslint-plugin-jest": "^24.1.3",
-    "eslint-plugin-prettier": "^3.1.4",
-    "eslint-plugin-react": "^7.21.5",
+    "@typescript-eslint/eslint-plugin": "^5.56.0",
+    "@typescript-eslint/parser": "^5.56.0",
+    "eslint": "^8.36.0",
+    "eslint-config-prettier": "^8.8.0",
+    "eslint-plugin-jest": "^27.2.1",
+    "eslint-plugin-prettier": "^4.2.1",
+    "eslint-plugin-react": "^7.32.2",
     "jest": "^26.4.2",
     "jest-junit": "^11.1.0",
     "jest-raw-loader": "^1.0.1",
     "jest-summary-reporter": "^0.0.2",
-    "lerna": "^4.0.0",
+    "lerna": "^7.0.0",
     "npm-run-all": "^4.1.5",
-    "prettier": "^2.1.0",
+    "prettier": "^2.8.6",
     "rimraf": "^3.0.2",
-    "shell-quote": "^1.7.2",
-    "typescript": "~4.1.3"
+    "shell-quote": "^1.7.2"
   }
 }

packages/jupyterlab-preview/src/preview.tsx

@@ -59,22 +59,26 @@ export class VoilaPreview extends DocumentWidget<IFrame, INotebookModel> {
 
     window.onmessage = (event: any) => {
       //console.log("EVENT: ", event);
-
-      switch (event.data?.level) {
+      const level = event?.data?.level;
+      const msg = event?.data?.msg;
+      if (!level || !msg) {
+        return;
+      }
+      switch (level) {
         case 'debug':
-          console.debug(...event.data?.msg);
+          console.debug(msg);
           break;
 
         case 'info':
-          console.info(...event.data?.msg);
+          console.info(msg);
           break;
 
         case 'warn':
-          console.warn(...event.data?.msg);
+          console.warn(msg);
           break;
 
         case 'error':
-          console.error(...event.data?.msg);
+          console.error(msg);
           break;
 
         default:

tsconfig.eslint.json

@@ -1,5 +1,7 @@
 {
   "extends": "./tsconfigbase",
   "include": ["packages/**/*", "ui-tests"],
-  "types": ["jest"]
+  "compilerOptions": {
+    "types": ["jest"]
+  }
 }