When working on a JavaScript project, you might encounter a common issue where you want to write JSX code in files with the ".js" extension, but your ESLint configuration, especially the Airbnb preset, does not allow JSX syntax in these files. This situation can be a bit frustrating, but fear not, there's a straightforward solution to tackle this problem and continue writing your code without any hiccups.
ESLint, a popular linter tool for JavaScript, is widely used to maintain code quality and consistency within a codebase. The Airbnb ESLint configuration is a popular choice among developers due to its comprehensive set of rules and best practices. One specific rule within the Airbnb config is the "react/jsx-filename-extension" rule, which enforces that files containing JSX should have the ".jsx" extension.
To address the issue of JSX not being allowed in files with a ".js" extension while using the Airbnb ESLint configuration, you'll need to make a simple adjustment to your ESLint configuration file.
Follow these steps to override the default Airbnb rule and allow JSX syntax in ".js" files:
1. Locate your project's ESLint configuration file, usually named ".eslintrc.js" or ".eslintrc.json" in the root directory of your project.
2. Within the ESLint configuration file, locate the "rules" section where ESLint rules are defined.
3. Add the following rule configuration to allow JSX in files with a ".js" extension:
"react/jsx-filename-extension": ["error", { "extensions": [".js", ".jsx"] }]By adding this rule configuration, you're specifying that both ".js" and ".jsx" files can contain JSX code within the project. This adjustment overrides the default Airbnb rule that restricts JSX to files with the ".jsx" extension.
After making this change and saving the ESLint configuration file, ESLint should now allow JSX syntax in both ".js" and ".jsx" files within your project, giving you the flexibility to write JSX code in files with the ".js" extension while maintaining the benefits of the Airbnb ESLint configuration.
Remember to run ESLint again in your project to ensure that the changes have taken effect and that your code remains consistent with the ESLint rules you've configured.
In conclusion, by making a simple adjustment to your ESLint configuration file, you can overcome the restriction of JSX syntax in files with a ".js" extension when using the Airbnb ESLint configuration. This tweak allows you to write clean and efficient code without compromising on coding standards. Happy coding!