JavaScript Modules (import/export)

The key difference between default and named exports lies in their importing syntax and usage: 1) Default exports allow the importing module to choose any name when importing, while named exports must be imported using their exact exported names (unless renamed with 'as'), 2) Each module can only have one default export, but can have multiple named exports, 3) Default exports use 'export default' syntax, while named exports use 'export' with specific identifiers, 4) Named exports require curly braces in import statements unless using * as namespace, default exports don't, 5) Default exports are useful for modules that export a single main value, while named exports are better for modules exporting multiple related items, 6) Default exports can lead to inconsistent naming across different files using the same module, 7) Named exports provide better autocomplete support in IDEs since the names are static.