How can I filter nested arrays in JavaScript?

How can I filter nested arrays in JavaScript?

You can use the filter method along with map to filter nested arrays. Would you like an example?

Yes, please provide an example.

Sure! If you have an array of objects, you can filter them like this:

const data = [
  { id: 1, items: [1, 2, 3] },
  { id: 2, items: [4, 5, 6] },
];

const filtered = data.map(obj => ({
  ...obj,
  items: obj.items.filter(item => item > 2)
}));
console.log(filtered);

This will filter the items in each object.

What if I want to filter based on a condition in the parent object?

You can do that by adding a condition in the filter method for the parent object. For example:

const filtered = data.filter(obj => obj.id === 1);

This will return only the objects that meet the condition.