docs: add eslint and fix lint errors

.github/workflows/docs.yml

@@ -0,0 +1,35 @@
+name: docs
+on:
+  push:
+    branches:
+    - main
+  pull_request:
+    branches:
+    - main
+    paths:
+    - 'docs/**'
+    - .github/workflows/docs.yml
+jobs:
+  lint:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - name: Set up Node
+        uses: actions/setup-node@v3
+        with:
+          node-version: '16.x'
+          check-latest: true
+      - name: Enforce consistent Yarn version
+        run: ./tools/install-yarn.sh
+      - name: node_modules cache
+        id: node-modules-cache
+        uses: actions/cache@v3
+        with:
+          path: |
+            **/node_modules
+          key: ${{ runner.os }}-node-modules-${{ hashFiles('**/yarn.lock') }}
+      - name: Install dependencies
+        if: steps.node-modules-cache.outputs.cache-hit != 'true'
+        run: yarn --cwd docs/_website install
+      - name: lint
+        run: yarn --cwd docs/_website lint

docs/_website/.eslintrc.js

@@ -0,0 +1,72 @@
+module.exports = {
+  env: {
+    browser: true,
+    es2021: true,
+  },
+  extends: [
+    "eslint:recommended",
+    "plugin:react/recommended",
+    "plugin:prettier/recommended",
+    "standard-with-typescript",
+  ],
+  overrides: [],
+  parserOptions: {
+    ecmaVersion: "latest",
+    sourceType: "module",
+    project: "./tsconfig.json",
+    // Required for VSCode to properly find tsconfig within docs dir.
+    // See https://github.com/typescript-eslint/typescript-eslint/issues/251 for more info
+    tsconfigRootDir: __dirname,
+  },
+  plugins: ["react"],
+  settings: {
+    react: {
+      version: "detect",
+    },
+  },
+  rules: {
+    // prettier enforces trailing commas
+    "comma-dangle": ["error", "only-multiline"],
+    // prettier enforces double quotes
+    quotes: ["error", "double"],
+    // prettier enforces trailing semicolons
+    semi: ["error", "always"],
+    // prettier enforces indentation
+    indent: ["off"],
+    // prettier enforces multiline ternary logic
+    "multiline-ternary": ["off"],
+    // prettier enforces double quotes
+    "@typescript-eslint/quotes": ["error", "double"],
+    // prettier enforces trailing semicolons
+    "@typescript-eslint/semi": ["error", "always"],
+    // prettier enforces indentation
+    "@typescript-eslint/indent": ["off"],
+    // prettier enforces trailing semicolons
+    "@typescript-eslint/member-delimiter-style": [
+      "error",
+      {
+        multiline: {
+          delimiter: "semi",
+          requireLast: true,
+        },
+        singleline: {
+          delimiter: "semi",
+          requireLast: false,
+        },
+      },
+    ],
+    // prettier enforces trailing commas
+    "@typescript-eslint/comma-dangle": ["error", "only-multiline"],
+    // see https://eslint.org/docs/latest/rules/space-before-function-paren#anonymous-always-named-never-asyncarrow-always for more info
+    "@typescript-eslint/space-before-function-paren": [
+      "error",
+      {
+        anonymous: "always",
+        named: "never",
+        asyncArrow: "always",
+      },
+    ],
+    // Prevents casting with `as` keyword
+    "@typescript-eslint/consistent-type-assertions": ["off"],
+  },
+};