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Export const vs. Export default: What\'s the Difference and When to Use Each?
Export const vs. Export default: What\'s the Difference and When to Use Each?
Understanding the Distinction between export const and export default in ES6
In ES6, developers have the choice between using export const and export default to declare and export variables. While the syntax is a key difference, deeper knowledge of their functionality and implementation can optimize your code structure.
The Difference Unraveled: Named vs. Default Export
export const represents a named export. It allows you to export multiple named entities like constant declarations from a single module. These exports must be imported using curly braces ({ }) in the importing module.
On the other hand, export default signifies a default export. A module can only have one default export, typically used when you want to export only one primary entity. When imported, it doesn't require a specific name, offering a bit more flexibility.
Use Cases and Implementation
Default Export
- Ideal when you need to export a single main item or object as the default export of a module.
- Imported with a specified name, providing greater flexibility.
Named Export
- Suited for situations where you wish to export multiple named variables or entities from a single module.
- Requires importing with curly braces to specify the desired exports.
Namespace Import
Additionally, you can use the import * as syntax to import all exports from a module as an object. This approach can be convenient when dealing with multiple named exports.
Notes:
- Default exports are essentially named exports with the name default.
- Using both named and default exports in the same module is possible.
- Default exports are often preferred due to their concise syntax and common use case.
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