Using es6 syntax for modules, we can use the `import`

Question

Using es6 syntax for modules, we can use the `import`

https://github.com/rt2zz/redux-persist showcases the code snippet below:

const persistedReducer = persistReducer(persistConfig, rootReducer)

export default () => {
  let store = createStore(persistedReducer)
  let persistor = persistStore(store)
  return { store, persistor }
}

The alternative approach is as follows, with a question about the differences:

const persistedReducer = persistReducer(persistConfig, rootReducer)

let store = createStore(persistedReducer)
let persistor = persistStore(store)
export { store, persistor }

EDIT

Moreover, what reasons might prompt someone to opt for the first structure over the second?

javascript ecmascript-6

Answer 1

Answer №1

The initial code snippet exports a function that outputs an object. On the other hand, the subsequent snippet simply returns an object.

Upon importing the initial snippet, you must invoke the function to obtain the object. In contrast, you can directly import the object from the subsequent snippet.

Answer 2

The initial code snippet exports a function that outputs an object. On the other hand, the subsequent snippet simply returns an object.

Upon importing the initial snippet, you must invoke the function to obtain the object. In contrast, you can directly import the object from the subsequent snippet.

Answer 3

Answer №2

Open the file a.mjs and type the following:

export default () => {
  let store = 'createStore';
  let persistor = 'persistStore';
  return { store, persistor }
}

let store = 'createStore';
let persistor = 'persistStore';
export { store, persistor }

Open the file b.mjs and write the following:

import a from './a.mjs';
import * as $a from './a.mjs';
import { store, persistor } from './a.mjs';

console.log('Exported default function:', a);
console.log('Exported object:', $a);
console.log('Default export from object:', $a.default);
console.log('Imported { store, persistor }:', store, persistor);

Run node --experimental-modules b.mjs

You will then see the result displayed like this:

Exported default function: [Function: default]
Exported object: [Module] {
  default: [Function: default],
  persistor: 'persistStore',
  store: 'createStore'
}
Default export from object: [Function: default]
Imported { store, persistor }: createStore persistStore

Answer 4

Open the file a.mjs and type the following:

export default () => {
  let store = 'createStore';
  let persistor = 'persistStore';
  return { store, persistor }
}

let store = 'createStore';
let persistor = 'persistStore';
export { store, persistor }

Open the file b.mjs and write the following:

import a from './a.mjs';
import * as $a from './a.mjs';
import { store, persistor } from './a.mjs';

console.log('Exported default function:', a);
console.log('Exported object:', $a);
console.log('Default export from object:', $a.default);
console.log('Imported { store, persistor }:', store, persistor);

Run node --experimental-modules b.mjs

You will then see the result displayed like this:

Exported default function: [Function: default]
Exported object: [Module] {
  default: [Function: default],
  persistor: 'persistStore',
  store: 'createStore'
}
Default export from object: [Function: default]
Imported { store, persistor }: createStore persistStore

Using es6 syntax for modules, we can use the `import`

Answer №1

Answer №2

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