Export const vs. export default: When to Use Which in ES6 Modules?

Exploring the Differences Between export const and export default in ES6

In the realm of exporting modules in ES6, two options emerge: export const and export default. While both serve the purpose of exporting JavaScript objects, there are distinct differences and use cases to consider.

Named Exports vs. Default Exports

export const allows you to export a named variable, while export default exports a single default object per module. This means that when using export default, you can import it with a placeholder name:

import myItem from 'myItem';

In contrast, export const requires you to explicitly specify the exported variable name when importing:

import { myItem } from 'myItem';

Multiple Exports

With named exports (export const), you can export multiple variables or objects. This is useful when exporting a collection of related items, such as a library of functions or a group of components.

Default Exports

Default exports are most appropriate when you want to export a single object or item as the primary export of a module. This is often the case for modules exporting a class or a primary function.

In-File Usage

Inside a module, export const creates a named variable that can be referenced directly within the module. export default, on the other hand, creates an unnamed default object that cannot be referenced directly and must be imported.

Conclusion

Choosing between export const and export default depends on the desired flexibility and usage patterns. Named exports offer flexibility for multiple exports, while default exports provide a concise and explicit way to export a single default object. Understanding these differences is crucial for effective module management in ES6.

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