Mutability vs Immutability in JavaScript

Published: 28 March 2021
on channel: Cloudaffle

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The concept of mutability and immutability in JavaScript is essential to understand to avoid errors. Mutable can be changed or added to where immutable means something that cannot be changed or added. Primitive values in JavaScript cannot have anything added upon to them, they can only be re-assigned, and hence all primitive values in JavaScript are immutable. Let’s dive deeper into the idea of mutability vs. immutability in JavaScript.

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📖 Video Chapters
00:00 Video Intro
00:32 Primitive types vs Reference Types
01:19 Six primitive types in JavaScript
01:31 Three reference types in JavaScript
01:39 How primitive types and reference types are different
03:52 Mutability vs Immutability in JavaScript
06:30 Introduction to spread operator

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