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Using ES6 modules, I know I can alias a named import:

import { foo as bar } from 'my-module';

And I know I can import a default import:

import defaultMember from 'my-module';

I'd like to alias a default import and I had thought the following would work:

import defaultMember as alias from 'my-module';

But that results in a parsing (syntax) error.

How can I (or can I?) alias a default import?

Using ES6 modules, I know I can alias a named import:

import { foo as bar } from 'my-module';

And I know I can import a default import:

import defaultMember from 'my-module';

I'd like to alias a default import and I had thought the following would work:

import defaultMember as alias from 'my-module';

But that results in a parsing (syntax) error.

How can I (or can I?) alias a default import?

• javascript
• ecmascript-6
• es6-modules

Share Improve this question Follow edited Oct 3, 2020 at 18:16 Peter Mortensen 31.6k2222 gold badges109109 silver badges133133 bronze badges asked Sep 1, 2016 at 23:24 sfletchesfletche 49.6k3131 gold badges108108 silver badges120120 bronze badges

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2 Answers 2

Sorted by: Reset to default 1797

defaultMember already is an alias - it doesn't need to be the name of the exported function/thing. Just do

import alias from 'my-module';

Alternatively you can do

import {default as alias} from 'my-module';

but that's rather esoteric.

Origins, Solution and Answer:

Background:

A module can export functionality or objects from itself for the use in other modules

The Modules Used for:

• Code reuse
• Separation of functionalities
• Modularity

What are Import Aliases?

Import aliases are where you take your standard import, but instead of using a pre-defined name by the exporting module, you use a name that is defined in the importing module.

Why is this important?

You may be importing multiple exported modules but the names of the exports (from different modules) are the same, this confuses JS. Aliases solve this.

Example of Multiple Alias Failed Compilation:

Failed to compile.
/somepath/index.js
SyntaxError: /somepath/index.js: Identifier 'Card' has already been declared (6:9)

Importing Aliases will allow you to import similarly named exports to your module.

import { Button } from '../components/button'
import { Card } from '../components/card'
import { Card } from 'react-native-elements'

When importing named exports (not default):

// my-module.js

function functionName(){
  console.log('Do magic!');
}

export { functionName };

Import in module:

import { functionName as AliasFunction} from "my-module.js"

What is default export?

Default export allows us to export a single value or to have a fallback value for your module.

For importing default exports:

// my-module.js
function functionName(){
  console.log('Do magic!');
}

export default functionName;

Solution

The defaultMember mentioned in the question is an alias already, you can change the name to whatever you will like.

Now import the exported function (functionName());

import AliasFunction from "my-module.js"

Or like this (as mentioned by @Bergi):

import {default as AliasFunction} from 'my-module.js';

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