Mastering ES6 Modules: A Beginner’s Guide

Unlock the power of modular programming in JavaScript with this easy-to-follow introduction to ES6 modules

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In the ever-evolving world of JavaScript, the introduction of ES6 (also known as ECMAScript 2015) brought about a significant change in the way we structure and organize our code. One of the most notable features of ES6 is the module system, which allows developers to create self-contained units of functionality and share them across different parts of an application.

In this article, we’ll dive into the basics of ES6 module syntax, exploring how to create, import, and export modules to build more modular and maintainable JavaScript applications.

Exporting Modules

Let’s start by understanding how to export values from a module. In ES6, you can export variables, functions, and classes using the export keyword. Here's an example:

// math.js
export const PI = 3.14159;

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

export class Calculator {
  constructor(a, b) {
    this.a = a;
    this.b = b;
  }

  multiply() {
    return this.a * this.b;
  }
}

In the example above, we’ve created a math.js module that exports a constant PI, a function add(), and a Calculator…