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TheDev
TheDev

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FrontEnd Interview Series

Why Changing a Copy Affects the Original Objects in JavaScript ? 🤔

Ever faced a situation in your JavaScript code where assigning an object or array to another variable and then modifying it unexpectedly changes the original? It’s not a mystery—this is how JavaScript handles object references.

To understand this behaviour you need to understand few things in details

  1. Reference Types: Why changes to one object affect the other.
  2. Shallow Copies: Techniques using the spread operator and Object.assign().
  3. Deep Copies: Leveraging structuredClone() and crafting a Custom Deep clone function.

I have explained and coded all these concept in my latest video
Watch the full video here:

💬 Have questions or insights? Share them in the comments below, and let's dive into the discussion!

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