typescript.js

/**
 * Custom config base for projects using typescript.
 */

module.exports = {
  extends: require.resolve("./base.js"),
  overrides: [
    {
      // For performance run typescript on ts files
      files: ["*.ts", "*.tsx"],
      parser: "@typescript-eslint/parser",
      parserOptions: {
        ecmaVersion: "latest",
        sourceType: "module",
      },
      plugins: ["@typescript-eslint"],
      extends: [
        "plugin:import/typescript",
        "plugin:@typescript-eslint/eslint-recommended",
        "plugin:@typescript-eslint/recommended",
        "plugin:@typescript-eslint/recommended-requiring-type-checking",
        "prettier",
      ],
      rules: {
        "no-param-reassign": ["error", { props: false }],
        "@typescript-eslint/naming-convention": [
          "error",
          { selector: "default", format: ["camelCase"] },
          { selector: "enumMember", format: ["PascalCase"] },
          { selector: "function", format: ["camelCase", "PascalCase"] },
          {
            selector: "parameter",
            format: ["camelCase"],
            leadingUnderscore: "allow",
            trailingUnderscore: "allow",
          },
          { selector: "typeLike", format: ["PascalCase"] },
          {
            selector: "variable",
            format: ["camelCase", "UPPER_CASE", "PascalCase"],
          },
          {
            selector: ["typeProperty", "objectLiteralProperty"],
            format: null,
            leadingUnderscore: "allow",
          },
        ],
        "@typescript-eslint/no-unused-vars": [
          "error",
          { argsIgnorePattern: "^_+$" },
        ],
        "@typescript-eslint/restrict-template-expressions": [
          "error",
          { allowAny: true },
        ],
        "@typescript-eslint/no-explicit-any": [
          "error",
          { ignoreRestArgs: true },
        ],
      },
      settings: {
        "import/resolver": { typescript: {} },
      },
    },
    {
      /**
       * Relax rules in test files
       */
      files: [
        "**/__tests__/*.{j,t}s?(x)",
        "**/test/**/*.{j,t}s?(x)",
        "**/*.spec.{j,t}s?(x)",
        "**/*.test.{j,t}s?(x)",
      ],
      rules: {
        "@typescript-eslint/no-unsafe-call": "off",
        "@typescript-eslint/no-unsafe-member-access": "off",
      },
    },
  ],
};