Summary  
Demonstrates how to serialize and deserialize objects and arrays using JSON.stringify and JSON.parse to store and retrieve them in a string-only storage system.

General domain of usage  
Client-side data persistence in web applications

Ly8gQ3JlYXRlIGFuIGFycmF5IG9mIG9iamVjdHMKY29uc3QgdXNlcnMgPSBbCiAgeyBuYW1lOiAiQWxpY2UiLCBhZ2U6IDI1IH0sCiAgeyBuYW1lOiAiQm9iIiwgYWdlOiAzMCB9Cl07CgovLyBDb252ZXJ0IHRoZSBhcnJheSBvZiBvYmplY3RzIHRvIGEgSlNPTiBzdHJpbmcKY29uc3QgdXNlcnNKU09OID0gSlNPTi5zdHJpbmdpZnkodXNlcnMpOwoKLy8gU2F2ZSB0aGUgc3RyaW5naWZpZWQgYXJyYXkgdG8gbG9jYWxTdG9yYWdlCmxvY2FsU3RvcmFnZS5zZXRJdGVtKCJ1c2VycyIsIHVzZXJzSlNPTik7CgovLyBSZXRyaWV2ZSB0aGUgc3RyaW5nIGZyb20gbG9jYWxTdG9yYWdlCmNvbnN0IHN0b3JlZFVzZXJzID0gbG9jYWxTdG9yYWdlLmdldEl0ZW0oInVzZXJzIik7CgovLyBQYXJzZSB0aGUgSlNPTiBzdHJpbmcgYmFjayBpbnRvIGEgSmF2YVNjcmlwdCBhcnJheQpjb25zdCBwYXJzZWRVc2VycyA9IEpTT04ucGFyc2Uoc3RvcmVkVXNlcnMpOwoKY29uc29sZS5sb2cocGFyc2VkVXNlcnMpOwovLyBPdXRwdXQ6IFsgeyBuYW1lOiAiQWxpY2UiLCBhZ2U6IDI1IH0sIHsgbmFtZTogIkJvYiIsIGFnZTogMzAgfSBd

When you want to store data like arrays or objects in `localStorage`, you need to remember that `localStorage` can only save strings. This is why you must use `JSON.stringify` to turn your JavaScript objects or arrays into a JSON string before saving them. When you want to use the data again, you retrieve the string and convert it back to its original structure with `JSON.parse`. This process ensures that your complex data is safely stored and can be accurately retrieved and used later, as shown in the code example above.

Why do you use `JSON.stringify` before saving objects to `localStorage`?

What must you do to retrieve an array from `localStorage`?

A clear and practical introduction to JSON and browser storage in JavaScript. Learn how to structure and manipulate JSON data, parse and stringify objects, and store information persistently using localStorage and sessionStorage. 

Develop a strong grasp of JSON as a universal data format. Learn how JSON is structured, how nested objects and arrays work, and how to avoid common syntax mistakes when handling real-world data.

Learn how to transform data seamlessly by parsing JSON into JavaScript objects and converting objects back into JSON. Explore how Web Storage fits into data-driven applications and how to manage stored values effectively.

Take JSON skills further by storing, retrieving, and updating both simple and complex data in the browser. Combine JSON with localStorage and sessionStorage to maintain application state and user data safely and efficiently.

Saving Objects and Arrays

1. Why do you use `JSON.stringify` before saving objects to `localStorage`?

2. What must you do to retrieve an array from `localStorage`?

Saving Objects and Arrays

1. Why do you use `JSON.stringify` before saving objects to `localStorage`?

2. What must you do to retrieve an array from `localStorage`?

Saving Objects and Arrays

1. Why do you use JSON.stringify before saving objects to localStorage?

2. What must you do to retrieve an array from localStorage?

Saving Objects and Arrays

1. Why do you use JSON.stringify before saving objects to localStorage?

2. What must you do to retrieve an array from localStorage?

1. Why do you use `JSON.stringify` before saving objects to `localStorage`?

2. What must you do to retrieve an array from `localStorage`?

1. Why do you use `JSON.stringify` before saving objects to `localStorage`?

2. What must you do to retrieve an array from `localStorage`?