Yes, Storybook will definitively be added into the boilerplate. To complete this setup, you can also install the Prettier extension for your IDE, in order for example to automatically format on save! This is where ESLint comes in: as a real crutch for developers, this tool has become today a must-have in all JavaScript projects, and if not already the case I strongly suggest you to install it! JS code runs twice, on client and server?

Next.js allows us to start a project quickly with Typescript, but what about an existing project? Happy to hear it! With ESLint (and Prettier), this is the guarantee of an optimal development experience and quality code! Unable to get Image to respect height and width when Can .js and .tsx files work together in Next? :robot_face: We can then specify our formatting preferences via a .prettierrc.json file placed at the root of our project: Finally, we can optimize Prettiers' parsing by adding a .prettierignore file, as always at the root of our project: To make sure that Prettier and ESLint work perfectly together, we will slightly adjust our .eslintrc.json file: ESLint will now run automatically with Prettier, reporting all syntax and/or formatting errors to the console. Sauf mention contraire, le contenu de ce site est publi sous license Creative Commons Attribution 4.0 International. (not sure). This is where Prettier comes in, perfectly complementing ESLint. wow I use you next boilerplate sir, is any plan to include storybook in your boilerplate in future? A linter have several purposes: to standardize code (single or double quotes, ), and above all to detect syntax errors. Next.js is the React framework by Vercel. -D eslint eslint-plugin-react eslint-plugin-react-hooks eslint-plugin-jsx-a11y, -D @typescript-eslint/parser @typescript-eslint/eslint-plugin, "@typescript-eslint/explicit-function-return-type", "allowConciseArrowFunctionExpressionsStartingWithVoid", -D prettier eslint-plugin-prettier eslint-config-prettier, Creative Commons Attribution 4.0 International, A Next.js project (existing one or generated through. Now all that remains is to organize our migration according to the specificities of our project, to then benefit from all the advantages of Typescript: robustness, maintainability, . Our project is now ready for its Typescript migration! Without forgetting of course the addition of the basic packages: We'll only need then to (re)launch the development server (next dev): Next.js will take care of completing the tsconfig.json file and creating the next-env.d.ts declaration file, necessary for the good support of types useful to the framework. Press question mark to learn the rest of the keyboard shortcuts, https://github.com/JustinBeaudry/nextjs-starter. To take benefit of a more complete Typescript experience, it might be interesting also to adjust the tsconfig.json file, passing the strict key to true. Based on a Next.js project, we will see how to configure Typescript & ESLint for a Typescript migration! A wrong variable declaration, an import error, All these errors that we all do, one day or another :man-facepalming:. Prettier takes care of everything! I have one Im tinkering with: https://github.com/JustinBeaudry/nextjs-starter. Our Typescript configuration will take place here, with some specific rules as needed. Creating a NextJS blog template if anyone is interested What am I doing wrong with the getServerSideProps function? This website was the starting point for this article, so do not hesitate to refer to its source code for more details! As a web developer, it's hard not to have heard about Typescript As an overlay to JavaScript, it helps strengthen the robustness of our code while participating in its documentation. I'm currently focusing on the testing part. Is anyone using Linaria (css-in-js library) with a recent Press J to jump to the feed. Next.js makes adding Typescript very easy, and to get started we'll only have to create a tsconfig.json file in the root directory. , Et voil ! . Here is a simple installation example for ESLint, with main plugins used in React environment: For use with Typescript, it will be necessary to complete with dedicated packages: It still remains to configure our linter, without forgetting to take into account the necessary cohabitation of Javascript and Typescript files, if only for the time of the migration: we will therefore adjust our configuration so that it can adapt to each type of file in our codebase, via an .eslintrc.json file placed at the root of the project: Besides the declarations relative to our plugins, we'll note the presence of the overrides key: as its name suggests, it allows you to define an additional configuration, specific to a type of file. Finally, don't forget to tell ESLint which files to ignore, such as those from node_modules for example, with an .eslintignore file (also placed at the root): We all appreciate reading a clear and uniformly formatted file, whether we code alone or in a team Just come back to a file after a few months of absence to realize it!