<ul data-eligibleForWebStory="true"><li>In JavaScript, objects are mutable, meaning changes made to one variable can affect another referencing the same object.</li><li>Techniques like shallow copying, deep copying, and Immer library can help avoid unintended side effects.</li><li>Shallow copy with spread operator only copies top-level fields, while manual deep copy and structuredClone offer solutions for nested objects.</li><li>Immer's produce function provides a cleaner syntax for creating immutable updates in JavaScript objects, making it useful for state management like in Redux.</li></ul>

Understanding Object Mutability, Shallow vs Deep Copy, and the Power of Immer in JavaScript

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