If ESLint won't let you build your NextJS 15 app because of no-unused-vars do this

Problem When you try to deploy your new NEXTJs 15 site and see this error: [!ERROR] Warning: 'someParams' is defined but never used. no-unused-vars You just need to disable a eslint configuration by adding a rule like this one: rules:{ "@typescript-eslint/no-unused-vars": "off" } So the complete eslint.config.mjs will look like this import { dirname } from "path"; import { fileURLToPath } from "url"; import { FlatCompat } from "@eslint/eslintrc"; const filename = fileURLToPath(import.meta.url); const dirname = dirname(filename); const compat = new FlatCompat({ baseDirectory: dirname, }); const eslintConfig = [ ...compat.config({ extends: ['next/core-web-vitals', 'next/typescript'], rules:{ "@typescript-eslint/no-unused-vars": "off" } }), ] export default eslintConfig;

Jan 29, 2025 - 13:43

If ESLint won't let you build your NextJS 15 app because of no-unused-vars do this

Problem

When you try to deploy your new NEXTJs 15 site and see this error:

[!ERROR]
Warning: 'someParams' is defined but never used. no-unused-vars

You just need to disable a eslint configuration by adding a rule like this one:

rules:{
      "@typescript-eslint/no-unused-vars": "off"
     }

So the complete eslint.config.mjs will look like this

import { dirname } from "path";
import { fileURLToPath } from "url";
import { FlatCompat } from "@eslint/eslintrc";

const __filename = fileURLToPath(import.meta.url);
const __dirname = dirname(__filename);

const compat = new FlatCompat({
  baseDirectory: __dirname,

});

const eslintConfig = [
  ...compat.config({
    extends: ['next/core-web-vitals', 'next/typescript'],
    rules:{
      "@typescript-eslint/no-unused-vars": "off"
     }
  }),

]
export default eslintConfig;