eslint.config.mjs

import { defineConfig, globalIgnores } from "eslint/config";
import nextVitals from "eslint-config-next/core-web-vitals";
import nextTs from "eslint-config-next/typescript";

const eslintConfig = defineConfig([
  ...nextVitals,
  ...nextTs,
  {
    rules: {
      // Catch common mistakes
      "no-console": ["warn", { allow: ["warn", "error"] }],
      "prefer-const": "error",
      "no-var": "error",
      "eqeqeq": ["error", "always"],
      "no-throw-literal": "error",
      "no-implicit-coercion": "error",

      // TypeScript strict rules
      "@typescript-eslint/consistent-type-imports": ["error", { prefer: "type-imports" }],
      "@typescript-eslint/no-unused-vars": [
        "error",
        { argsIgnorePattern: "^_", varsIgnorePattern: "^_" },
      ],
    },
  },
  // Override default ignores of eslint-config-next.
  globalIgnores([
    // Default ignores of eslint-config-next:
    ".next/**",
    "out/**",
    "build/**",
    "next-env.d.ts",
  ]),
]);

export default eslintConfig;