ESLint 9

Since v4.0 the default version of ESLint is v9, here is a guide how to upgrade.

Standard

In previous versions standard was used, be sure to remove it if present.

npm remove eslint-config-standard

Neostandard

In previous versions neostandard was used, be sure to remove it if present.

npm remove neostandard

Install

npm i eslint@latest @eslint/js @stylistic/eslint-plugin --save-dev

• Copy eslint.config.js from the current stable version to your project
• Remove .eslintrc If you were using v8