Default vs Named exports (2024)

FAQs

Default vs Named exports? ›

Difference between Named exports and Default exports. With named exports, you can export multiple variables, functions, or classes from a single module. Default export is used to export a single value from a module. This value can be a function, object, class, etc.

Default exports are used to export a single "main" value from a module, while named exports allow us to export multiple values with specific names. Default exports allow us to import the exported value with any name in the importing module, while named exports require us to use the exact exported names when importing.

It's recommended to avoid using default exports and instead opt for named exports whenever possible. By doing so, you'll have a more organized and maintainable codebase that's easier to work with in the long run.

People often use default exports if the file exports only one component, and use named exports if it exports multiple components and values. Regardless of which coding style you prefer, always give meaningful names to your component functions and the files that contain them.

The advantage of using the default keyword is when you have only one function in a file and want to export that. The advantage of using default in such scenarios is that other files can name if whatever they want and don't need to explicitly import it with the same name as exported and without using curly braces.

Named exports are useful when you have multiple entities to export, while default exports are suitable for a single, primary entity. By mastering these export techniques, you can efficiently structure your code and make it more readable and reusable.

In JavaScript, export default allows you to export a single object, function, or variable from a module.

It's important to note that a file can have both named and default exports together. This means you can export one main thing using export default , while also exporting multiple additional values using export .

Having exports with duplicate names or using more than one default export will result in a SyntaxError and prevent the module from being evaluated. The export default syntax allows any expression.

Ensuring that default exports are named helps improve the grepability of the codebase by encouraging the re-use of the same identifier for the module's default export at its declaration site and at its import sites.

What is the difference between default and named imports React? ›

Use default imports when dealing with modules that export a single, primary functionality, such as a React component. Use named imports when a module provides multiple functionalities, and you need specific ones in your component or module.

How to set a default prop in React. Default props are useful when you want to have a fallback prop in case the user doesn't specify one. For example, you might want to have a default font size for a paragraph component.

The role of JS files and CSS files in a React Project

In a React project, js files contain all the logic for the application. Each component has its own JS file, which includes the component's JSX structure, state, and any functions it needs. CSS files, on the other hand, contain the styling for the components.

Exporting can be profitable for businesses of all sizes. On average, sales grow faster, more jobs are created, and employees earn more than in non-exporting firms. Competitive Advantage.

Every module can have two different types of export, named export and default export. You can have multiple named exports per module but only one default export.

In summary, `module. exports` is associated with CommonJS modules used in Node. js, while `export default` is associated with ES6 modules used in modern JavaScript environments, including browsers and newer versions of Node.