Javascript - Syntax for exporting multiple objects from a .js file while maintaining a "default export"

NadavS
September 19, 2023
175 views
0 votes
2 Answers

I have an existing common.js file that exports only one object from it. As a result, another existing some_other_file_1.js file includes the line const common = require('common') and is able to use that export.

I would like to modify common.js to export additional objects, without having to modify some_other_file_1.js. Those additional objects will be used by other files. What is the syntax for that?

My current code:

some_other_file_1.js (I must not modify this file)

const common = require('common')

const foo = () => {
  common.dostuff()
}

common.js (the file I want to modify)

const common = {
  dostuff: () => {
    // code I've omitted
  },
}

const cool_func = () => {
  // code I've omitted
}

module.exports = common
// >>> I wish to also export cool_func <<<

Tags: javascript node.js

Answers

- LevG
- September 11, 2023 at 8:50 pm
- 0 votes
0
To export additional objects from your common.js file without modifying some_other_file_1.js, you can create a new object that combines both common and cool_func and export that new object. Here’s how you can do it:

common.js (modified):
```
const common = {

dostuff: () => {
    // code I've omitted
  },
};

const cool_func = () => {
  // code I've omitted
};

// Create a new object that combines common and cool_func
const combinedExports = {
  common,
  cool_func,
};

module.exports = combinedExports;
```
Now, some_other_file_1.js can still use the common object as it did before, and other files can access cool_func as follows:

some_other_file_1.js (unchanged):
```
const common = require('common');

const foo = () => {
  common.dostuff();
};
```
Another_file.js (or any other file that wants to use cool_func):
```
const common = require('common');

common.cool_func(); // You can now use cool_func
```
By creating the combinedExports object in common.js, you can export both the original common object and the new cool_func function without modifying the importing code in some_other_file_1.js.
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- Madison
- September 11, 2023 at 9:08 pm
- 0 votes
0
Assign the named export as a property

You could assign the new export as a property on your current export.

For example:
```
// common.js

const common = {
  doStuff: () => {
    /* ... */
  }
};

const cool_func = () => {
  /* ... */
};

common.cool_func = cool_func;

module.exports = common;
```
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