Add linter

.eslintrc

@@ -0,0 +1,49 @@
+{
+  "extends": [
+    "eslint:recommended"
+  ],
+  "plugins": [
+    "jsdoc"
+  ],
+  "env": {
+    "es6": true,
+    "node": true,
+    "jest": true
+  },
+  "parserOptions": {
+    "sourceType": "module"
+  },
+  "globals": {
+    "$w": "readonly"
+  },
+  "rules": {
+    "linebreak-style": "off",
+    "no-console": "off",
+    "no-else-return": "error",
+    "require-await": "error",
+    "no-trailing-spaces": "error",
+    "indent": [
+      "error",
+      2,
+      {
+        "SwitchCase": 2
+      }
+    ],
+    "quotes": [
+      "error",
+      "single"
+    ],
+    "semi": [
+      "error",
+      "always"
+    ],
+    "space-before-function-paren": [
+      "error",
+      {
+        "anonymous": "always",
+        "named": "never",
+        "asyncArrow": "always"
+      }
+    ]
+  }
+}

.github/workflows/ci.yml

@@ -0,0 +1,14 @@
+name: repeater-scope
+
+on: [push, pull_request]
+
+jobs:
+  lint:
+    runs-on: ubuntu-20.04
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions/setup-node@v2
+        with:
+          node-version: '14.x'
+      - run: npm ci
+      - run: npm run lint

.gitignore

@@ -0,0 +1,5 @@
+node_modules/
+.DS_Store
+
+*.log
+*.tgz

.npmrc

@@ -0,0 +1 @@
+registry=https://registry.npmjs.org

.nvmrc

@@ -0,0 +1 @@
+14.16