.eslintrc.json

{
  "root": true,
  "env": {
    "commonjs": true,
    "es2021": true,
    "node": true
  },
  "extends": [
    "plugin:@cspell/recommended",
    // Enables eslint-plugin-prettier and eslint-config-prettier.
    // This will display Prettier errors as ESLint errors.
    // This should always be the last configuration in the extends array.
    "plugin:prettier/recommended"
  ],
  "overrides": [
    /*
     * Javascript files.
     */
    {
      "files": ["*.js"],
      "extends": [
        "standard",
        // Enables eslint-plugin-prettier and eslint-config-prettier.
        // This will display Prettier errors as ESLint errors.
        // This should always be the last configuration in the extends array.
        "plugin:prettier/recommended"
      ],
      "parserOptions": {
        "ecmaVersion": "latest"
      }
    },

    /*
     * JSON files.
     */
    {
      "files": ["*.json"],
      "extends": [
        "plugin:json/recommended-with-comments",
        // Enables eslint-plugin-prettier and eslint-config-prettier.
        // This will display Prettier errors as ESLint errors.
        // This should always be the last configuration in the extends array.
        "plugin:prettier/recommended"
      ]
    },

    /*
     * `package.json` file.
     * This needs it's own configuration, because it doesn't work together with `plugin:json`.
     * See https://github.com/kellyselden/eslint-plugin-json-files/issues/40
     * Must be after `*.json`.
     */
    {
      "files": ["package.json"],
      "plugins": ["json-files"],
      "extends": [
        // Enables eslint-plugin-prettier and eslint-config-prettier.
        // This will display Prettier errors as ESLint errors.
        // This should always be the last configuration in the extends array.
        "plugin:prettier/recommended"
      ],
      "rules": {
        "json-files/ensure-repository-directory": "error",
        "json-files/no-branch-in-dependencies": "error",
        "json-files/require-engines": "error",
        "json-files/require-license": "error",
        "json-files/require-unique-dependency-names": "error",
        "json-files/sort-package-json": "error"
      }
    },

    /*
     * Markdown files.
     */
    {
      "files": ["*.md"],
      "parser": "eslint-plugin-markdownlint/parser",
      "extends": [
        "plugin:markdownlint/recommended",
        // Enables eslint-plugin-prettier and eslint-config-prettier.
        // This will display Prettier errors as ESLint errors.
        // This should always be the last configuration in the extends array.
        "plugin:prettier/recommended"
        // Enable once supported for Markdown files.
        // See https://github.com/streetsidesoftware/cspell/issues/3464
        //"plugin:@cspell/recommended"
      ],
      "rules": {
        "markdownlint/md033": ["error", { "allowed_elements": ["br"] }], // Allow br-element.
        "prettier/prettier": ["error", { "parser": "markdown" }]
      }
    }
  ]
}