Improve Code Quality With ESLint And Husky

In software development, maintaining code quality is essential for the long-term success of a project. Code quality not only ensures that the code is easy to read and maintain but also reduces the number of bugs and errors that can arise during development. One way to improve code quality is by using ESLint in your React Native project. ESLint is a popular linter that helps to enforce coding standards and catch common errors.

In this blog post, we’ll cover how to integrate ESLint in a React Native project and use Husky to block commits if ESLint gives errors.

Setting Up ESLint In A React Native Project

To set up ESLint in our React Native project, we’ll use the eslint package and install it as a dev dependency.

npm install eslint --save-dev

Once installed, we can run the following command to set up a new ESLint configuration file:

npx eslint --init

This will prompt you with a series of questions about your project and coding style preferences. Once you’ve answered these questions, ESLint will generate a configuration file (eslintrc.json) that you can use to enforce coding standards in your project.

Next, we need to configure ESLint to work with React Native. We can do this by installing the eslint-plugin-react package and adding it to our ESLint configuration file.

npm install eslint-plugin-react --save-dev

Add the following configuration to your eslintrc.json file to enable ESLint for React Native:

{
  "extends": [
    "eslint:recommended",
    "plugin:react/recommended"
  ],
  "plugins": [
    "react"
  ],
  "settings": {
    "react": {
      "version": "detect"
    }
  },
  "rules": {
    // add your rules here
   }
.../
}

With this configuration, ESLint will now be able to detect errors and enforce coding standards in your React Native code.

Using Husky To Block Commits If ESLint Gives Errors

Now that we have ESLint set up in our project, we can use Husky to block commits if ESLint gives errors. Husky is a Git hook manager that allows you to run scripts before committing code. We can use Husky to run ESLint before each commit and block the commit if ESLint gives errors.

First, we need to install Husky and the lint-staged package as dev dependencies:

npm install husky lint-staged --save-dev

Next, we need to configure Husky to run ESLint before each commit. Add the following configuration to your package.json file:

{
  "husky": {
    "hooks": {
      "pre-commit": "lint-staged"
    }
  },
  "lint-staged": {
    "*.js": [
      "eslint --fix",
      "git add"

This configuration tells Husky to run lint-staged before each commit, which will run ESLint on all JavaScript files that are staged for commit. If ESLint gives errors, the commit will be blocked.

With this setup, you can ensure that all code committed to your project meets your coding standards and is free of common errors.

Conclusion

In this blog post, we covered how to integrate ESLint in a React Native project and use Husky to block commits if ESLint gives errors. By using ESLint to enforce coding standards and catch common errors, you can improve the code quality.