JavaScript Masterclass - Zero to Job-Ready with Hands-On Projects - Babel Introduction

This lecture introduces Babel, a tool that allows developers to write modern JavaScript while ensuring compatibility with older browsers. The instructor explains the challenges of using modern JavaScript features like 'let', 'async/await', and arrow functions, which are not supported by all browsers. Babel solves this by converting modern code into an older version that is widely supported. A demonstration shows how Babel transforms code using its online platform. The lecture concludes with a preview of the next session, which will cover installing Babel locally using NPM.

What is the significance of using 'let' and 'const' in modern JavaScript as opposed to 'var'?

Describe the process of using Babel with NPM as mentioned in the lecture.