Which ECMAScript 6 features are natively available in Node js without the --harmony flag

Question

With the help of proper example and code can you tell me Which ECMAScript 6 features are natively available in Node.js without the --harmony flag?

Answer 1

Here’s a breakdown of the key ES6 features natively available in Node.js without the --harmony flag:

1. Block Scoping: let and const

let - Block-scoped variable declaration.

const - Block-scoped constant declaration.

let x = 10;

const y = 20;

2. Arrow Functions (=>)

Lexical this binding, shorter syntax for functions.

const add = (a, b) => a + b;

3. Template Literals

String interpolation and multiline strings.

const name = 'Ram';

console.log(`Hello, ${name}!`);

4. Classes

Class-based object-oriented programming.

class Person {

  constructor(name) {

    this.name = name;

  }

  greet() {

    return `Hello, ${this.name}!`;

  }

}

5. Default Parameters

Function parameters with default values.

function greet(name = 'User') {

  return `Hello, ${name}!`;

}