Es6 Variable Import Name In Node Js

When working with Node.js, understanding ES6 syntax is crucial. One key feature that ES6 introduced is the ability to import code modules using the `import` statement. In this guide, we will delve into how you can use ES6 variable import names in Node.js to streamline your code and make it more readable and organized.

To import a module with ES6 variable import name in Node.js, you first need to ensure that your Node.js version supports ES6 syntax. Starting from Node.js version 12, ES6 module syntax is supported natively. You can confirm your Node.js version by running `node -v` in your terminal.

Let's say you have a module named `utils.js` exporting a function named `sum`:

// utils.js
export function sum(a, b) {
  return a + b;
}

To import and use this `sum` function in another file using ES6 variable import name, you can do the following:

// app.js
import { sum } from './utils.js';

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

In this code snippet, we are importing the `sum` function specifically from the `utils.js` file using ES6 destructuring syntax within the `import` statement.

It's important to note that when using ES6 module syntax in Node.js, file extensions (e.g., `.js`) should be specified in the import statement.

If you want to give the imported function a different name locally, you can use the `as` keyword in the import statement. Here's an example:

import { sum as calculateSum } from './utils.js';

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

In this case, we have renamed the imported `sum` function to `calculateSum` within the scope of the `app.js` file.

By using ES6 variable import names in Node.js, you can create cleaner and more structured code. This feature also allows you to selectively import only the necessary functions or variables from a module, making your code more optimized and efficient.

Remember to run your Node.js code with the `--experimental-modules` flag when using ES6 module syntax on versions prior to Node.js 12.

In conclusion, mastering ES6 variable import names in Node.js can greatly enhance your coding workflow and improve the organization of your project. Experiment with this feature in your Node.js applications to leverage the power of ES6 syntax and make your code more maintainable.