Quickly setup code formatter and linter 2025-03-01

Last updated: June 2023

Setting up a code linter and formatter for every new project can be a hassle. If you’d rather not spend time configuring these tools repeatedly, this guide is for you.

Go

Navigate to the project’s root directory and run:

go fmt ./...

JavaScript

Install ESLint and Prettier:

npm install --save-dev --save-exact eslint eslint-config-prettier prettier

Create an ESLint flat config file, eslint.config.js, in the project root with the following content:

import js from "@eslint/js";
import prettier from "eslint-config-prettier";

export default [js.configs.recommended, prettier];

To lint your code, use:

eslint <dir>

To format your code, run:

prettier --write <dir>

Python 3

Install Pylint and Black:

pip3 install pylint black

To lint your code, run:

python3 -m pylint <dir>

To format your code, use:

python3 -m black <dir>