Understanding Hoisting in ECMAScript Modules (ESM): A Comprehensive Guide

Mastering the Core Concepts for Effective Module-Based JavaScript Programming

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ECMAScript Modules (ESM) have revolutionized the way JavaScript applications are built and organized. However, understanding hoisting within the context of ESM is crucial for writing clean and efficient module-based code.

In this article, we’ll explore hoisting in ESM, providing practical examples to deepen your understanding.

Understanding ECMAScript Modules (ESM)

ECMAScript Modules (ESM) are the standard mechanism for modular programming in JavaScript. They allow developers to split their code into multiple files, making it more organized, maintainable, and reusable. Modules in ESM are explicitly declared using import and export statements.

Consider the following example of an ESM:

// module.js
export function greet(name) {
  return `Hello, ${name}!`;
}

// main.js
import { greet } from './module.js';

console.log(greet('John')); // Output: "Hello, John!"

In this example, greet function is exported from module.js and imported into main.js using the import statement.

Hoisting in ECMAScript…