Why should you care?

APIs return JSON objects. Your app stores one object per product, user, or order.

See it live — copy this example

Paste into an HTML file or the browser console (F12). Use Run below when the live editor is available.

const user = {
  name: "Ravi",
  age: 25,
  isAdmin: false
};

console.log(user.name);
user.age = 26;
console.log(user["age"]);

Run Example »

Edit the code below and click Run to see the result in Toolliyo’s live editor.

What happened?

• Curly braces define an object.
• Properties are key: value pairs.
• user.name and user["age"] read the same property different ways.

Practice next

1. Log user.name and user["age"].
2. Add email property and update age.
3. Nest address: { city: "Pune" }.
4. Add a method greet() on the user object that uses this.name.
5. Use Object.keys(user) to list all property names.

Remember

{ key: value } obj.key or obj["key"] Objects model real-world things

ScriptVerse customer record

Each CRM contact is one object with name, company, and stage passed between list and detail views.

Outcome: Objects model real entities and serialize cleanly to JSON for APIs.