How do I work with nested objects and arrays in JavaScript?

How do I work with nested objects and arrays in JavaScript?

You can access nested objects and arrays using dot notation or bracket notation. For example, if you have an object like const obj = { a: { b: [1, 2, 3] } };, you can access the array with obj.a.b.

Can you show me an example of modifying a nested array?

Sure! If you want to change the second element of the array in the previous example, you can do it like this: obj.a.b[1] = 5;.

What if I want to add a new object to a nested array?

You can use the push method. For example: obj.a.b.push(4); will add 4 to the end of the array.

How can I loop through a nested array?

You can use a forEach loop. For example: obj.a.b.forEach(item => console.log(item)); will log each item in the array.