Understanding Modern JavaScript: From ES6 to Today

Jane Developer
2025-04-01
Blog Post
JavaScript has evolved dramatically since the introduction of ES6 (ECMAScript 2015). This post explores key features that transformed the language and how developers use them today.

Variables and Scope

The introduction of let and const changed how we think about variable declarations:
  1. var - function scoped, hoisted
  2. let - block scoped, not hoisted
  3. const - block scoped, cannot be reassigned

Let's look at some examples:

// Old way var name = "JavaScript"; var version = 6; var released = true;
Bold text
italic text

this is a quote

anonymous

Markdown Guide
// Modern way const name = "JavaScript"; let version = 6; const released = true;

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