JavaScript Style Guide

What is the Airbnb Style Guide?

The Airbnb style guide is a set of best practices and guidelines for generating quality code. It is one of the most popular style guides available on Github.

- Step 1 Installing ESLint to Your Project

ESLint is the most popular and very flexible JavaScript linting tool. It is a static code analyzer to identify problematic patterns in your JavaScript code.

To install ESLint, we need first to install npm, the package manager for JavaScript.

Now were ready! Create a package.json file with default configuration using the following command.

npm init -y

To set up ESLint, the next thing we need to do is, install the ESLint npm package. Finally, install ESLint with the following command.

npm install eslint --save-dev

Cool, were done with the ESLint installation. The next thing we have to do is install the style guide we want to use, Airbnb. Luckily, Airbnb provides an ESLint configuration that anyone can use.

- Step 2 Installing Airbnb Style Guide to Your Project

ESLint needs a configuration file to implement rules. We can create the configuration file to enforce the rules type the following command

npx eslint --init

This command will give us several options to choose from.

Lets go with the third option. After choosing the third option and pressing enter, youll get another set of options to choose from. Select the most suitable option as per your need until you come across the following option.

Choose the first option from here and Airbnbs style guide from the next set of options.

If you want to set up a Standard style guide or Googles style guide for JavaScript instead of Airbnbs style guide, you can follow the same set of instructions and choose the respective style guide from the above step.

To complete the style guide installation, press enter and choose other options as per your requirement. This will create a .eslintrc.json file on your working directory, and it will look like the below.

Also, based on the options you chose, your package.json file will look like the following

For ESLint to find and fix the bugs right on our text editor, we need to install the VS Code ESLint extension. So, fantastic, were are done with the style guide implementation. Now its time to move on to the Prettier installation.

- Step 3 Installing Prettier to Your Projec

Prettier is one of the most popular code formatters. We can install Prettier locally using the following command.

npm install --save-dev --save-exact prettier

Then, we need to create a configuration file for Prettier in our root directory.

echo {}> .prettierrc.json

This JSON file holds the rules that Prettier use to format our code. In addition, I have added a few of my preferences below.

{  "trailingComma": "es5",  "tabWidth": 4,  "semi": true,  "bracketSpacing": true,  "singleQuote": true}

Now lets install the VS Code Prettier extension. Then we need to ensure that all our JavaScript files get formatted by Prettier. Go to the settings.json file in VS Code and change the relevant existing line as below.

{  "editor.defaultFormatter": "esbenp.prettier-vscode",  "[javascript]": {    "editor.defaultFormatter": "esbenp.prettier-vscode"  }}

We are almost done! To make sure Prettier formats on save, insert the following line on the same file mentioned above.

"editor.formatOnSave": true,

It turns out ESLint rules might conflict with Prettier. To avoid that, we need to disable the formatting for ESLint. For that, we need to install one extra npm package

npm i eslint-config-prettier

Then add prettierto the extends array in your .eslintrc.json file as below. Make sure to add it at the end of the array so that it will override other configs.

Thats it! Now its time for some fun

Testing Airbnb Style Guide

To test if it is working, create a index.js file and add the following code line set.

Pretty cool, right? As you can see, ESLint finds and fix issues in our code and Prettier formats on save.

Final Thoughts

Combining Airbnb style, ESLint, and Prettier into our workflow helps us enhance the code quality and maintain a consistent style guide. However, I suggest going ahead and look over the documentation of each of these tools.

Thank you for reading!

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