Improve development environment

.eslintrc.json

@@ -0,0 +1,97 @@
+{
+    "parserOptions": {
+        "ecmaVersion": 2020
+    },
+    "plugins": [
+        "brace-rules"
+    ],
+    "rules": {
+        "no-caller": 1,
+        "no-cond-assign": 1,
+        "no-constant-condition": ["error", { "checkLoops": false }],
+        "no-dupe-args": 1,
+        "no-dupe-keys": 1,
+        "no-duplicate-case": 1,
+        "no-empty": 1,
+        "no-extra-boolean-cast": 0,
+        "no-extra-parens": 0,
+        "no-extra-semi": 1,
+        "no-floating-decimal": 1,
+        "no-func-assign": 1,
+        "no-negated-in-lhs": 1,
+        "no-obj-calls": 1,
+        "no-unreachable": 1,
+        "no-use-before-define": ["error", "nofunc"],
+        "use-isnan": 1,
+        "valid-jsdoc": 0,
+        "valid-typeof": 1,
+
+        "block-scoped-var": 0,
+        "consistent-return": 1,
+        "default-case": 1,
+        "dot-notation": 1,
+        "no-else-return": 1,
+        "no-invalid-this": 1,
+        "no-loop-func": 0,
+        "no-multi-spaces": ["warn", { "ignoreEOLComments": true }],
+        "no-new": 1,
+        "no-redeclare": 0,
+        "no-return-assign": 1,
+        "no-self-assign": 1,
+        "no-self-compare": 1,
+        "no-unmodified-loop-condition": 1,
+        "no-unused-expressions": 1,
+        "no-unused-labels": 1,
+        "no-useless-concat": 0,
+        "yoda": 1,
+
+        "no-delete-var": 1,
+        "no-label-var": 1,
+        "no-shadow-restricted-names": 1,
+        "no-shadow": 1,
+        "no-undef": 0,
+        "no-undef-init": 1,
+        "no-unused-vars": 0,
+
+        "comma-spacing": 1,
+        "indent": ["warn", "tab", { "outerIIFEBody": 0 }],
+        "key-spacing": 1,
+        "new-cap": 0,
+        "new-parens": 1,
+        "no-mixed-spaces-and-tabs": ["warn", "smart-tabs"],
+        "no-multi-assign": 1,
+        "no-trailing-spaces": 1,
+        "no-unneeded-ternary": 1,
+        "no-irregular-whitespace": 1,
+        "object-curly-spacing": ["warn", "always"],
+        "operator-assignment": 1,
+        "operator-linebreak": ["warn", "after"],
+        "quote-props": 1,
+        "semi": 1,
+        "semi-spacing": 1,
+        "space-before-function-paren": ["warn", "never"],
+        "space-in-parens": 1,
+        "space-unary-ops": 1,
+        "spaced-comment": ["warn", "always"],
+
+        "no-class-assign": 1,
+        "no-const-assign": 1,
+        "no-dupe-class-members" : 1,
+        "prefer-const": 1,
+
+        "brace-rules/brace-on-same-line": ["warn", {
+            "FunctionDeclaration": "never",
+            "FunctionExpression": "ignore",
+            "ArrowFunctionExpression": "always",
+            "IfStatement": "never",
+            "TryStatement": "ignore",
+            "CatchClause": "ignore",
+            "DoWhileStatement": "never",
+            "WhileStatement": "never",
+            "ForStatement": "never",
+            "ForInStatement": "never",
+            "ForOfStatement": "never",
+            "SwitchStatement": "never"
+        }, { "allowSingleLine": true }]
+    }
+}

.github/workflows/eslint.yml

@@ -0,0 +1,24 @@
+name: ESLint
+
+on: [push, pull_request]
+
+jobs:
+  eslint:
+    name: Run ESLint
+    runs-on: ubuntu-latest
+
+    steps:
+    - name: Check out repository code
+      uses: actions/checkout@v3
+
+    - name: Set up Node.js
+      uses: actions/setup-node@v3
+      with:
+        node-version: '16' # Set this to the node version you want to use
+
+    - name: Install dependencies
+      run: npm install
+
+    - name: Run linter
+      run: npm run lint
+

.gitignore

@@ -0,0 +1 @@
+node_modules