Fix ESLint errors (#129)

* Fix ESLint errors

* Fix CircleCI config

.circleci/config.yml

@@ -12,7 +12,7 @@ jobs:
       - run:
           name: Check that all text files end in a trailing newline
           command: ./dev-scripts/check-trailing-newline
-  check_frontend_formatting:
+  check_frontend:
     docker:
       - image: cimg/node:16.14.2
     steps:
@@ -23,6 +23,9 @@ jobs:
       - run:
           name: Check formatting
           command: npm run check-format
+      - run:
+          name: Check lint
+          command: npm run lint
   test_go:
     docker:
       - image: cimg/go:1.17.4
@@ -93,13 +96,13 @@ workflows:
   test_deploy:
     jobs:
       - check_whitespace
-      - check_frontend_formatting
+      - check_frontend
       - test_go
       - e2e
       - deploy:
           requires:
             - check_whitespace
-            - check_frontend_formatting
+            - check_frontend
             - test_go
             - e2e
           filters:

.eslintrc.js

@@ -0,0 +1,14 @@
+module.exports = {
+  root: true,
+  env: {
+    node: true,
+    es6: true,
+  },
+  extends: ["plugin:cypress/recommended", "eslint:recommended"],
+  rules: {
+    "no-console": "error",
+  },
+  parserOptions: {
+    parser: "babel-eslint",
+  },
+};

e2e/cypress/plugins/index.js

@@ -1,3 +1,3 @@
-module.exports = function (on, config) {
+module.exports = function () {
   // Add plugins here.
 };