export all functions

Export All Functions

If you are working on a JavaScript project, you might have written different functions in different files. To make these functions available for use in other parts of your code, you need to export them. In this article, we will look at how to export all functions in a file or module.

Exporting All Functions in a File

If you want to export all functions in a file, you can use the module.exports syntax.

function add(a, b) {
    return a + b;
}

function subtract(a, b) {
    return a - b;
}

module.exports = {
    add,
    subtract
};

In the above code, we have defined two functions add and subtract. To export these functions, we have used module.exports and passed an object with the function names as keys and the function references as values.

Now, we can import these functions in another file by using the require statement.

const { add, subtract } = require('./math');

console.log(add(2, 3)); // Output: 5
console.log(subtract(5, 2)); // Output: 3

In the above code, we have imported the add and subtract functions from the math.js file using the require statement. We can now use these functions in our code.

Exporting All Functions in a Module

If you are using a module system like CommonJS or ES6 modules, you can export all functions in a module using the export * syntax.

// math.js

export function add(a, b) {
    return a + b;
}

export function subtract(a, b) {
    return a - b;
}

In the above code, we have defined two functions add and subtract and exported them using the export keyword.

To import these functions in another file, we can use the import statement.

// app.js

import * as math from './math.js';

console.log(math.add(2, 3)); // Output: 5
console.log(math.subtract(5, 2)); // Output: 3

In the above code, we have imported all functions from the math.js module using the import * syntax and assigned them to a variable called math. We can now use these functions using the dot notation.

Conclusion

In this article, we looked at how to export all functions in a file or module. By exporting functions, we can make them available for use in other parts of our code. Whether you are using CommonJS or ES6 modules, exporting functions is a fundamental concept in JavaScript development.