How do I work with nested objects in JavaScript?

How do I work with nested objects in JavaScript?

You can access nested objects using dot notation or bracket notation. For example, if you have an object like const obj = { a: { b: 1 } };, you can access obj.a.b.

What if I want to update a value in a nested object?

You can update a value by directly assigning a new value to the property. For example, obj.a.b = 2; will change the value of b to 2.

How can I check if a nested property exists?

You can use the optional chaining operator ?. to safely check for nested properties. For example, obj.a?.b will return undefined if a doesn't exist.

Can you give me an example of a nested object?

Sure! Here's an example: const user = { name: 'Alice', address: { city: 'Wonderland', zip: '12345' } };.