जावास्क्रिप्टमधील ऑब्जेक्ट्स

𝗢𝗯𝗷𝗲𝗰𝘁𝘀 𝗶𝗻 𝗝𝗮𝘃𝗮𝗦𝗰𝗿𝗶𝗽𝘁

JavaScript objects store related data as key-value pairs. Each key acts as a unique identifier for its value.

Values in an object include:

• Primitives
• Other objects
• Functions (called methods)

Objects are mutable. You add, change, or remove properties at any time. This helps you group data and behavior together.

Two ways to create objects:

1. Object Literals Use curly braces to define properties directly. Example: const user = { name: "Vidhya", age: 23, job: "Developer" };

2. New Object Constructor Use the Object() constructor. Example: const user = new Object(); user.name = "Alex"; user.age = 4;

How to work with objects:

• Accessing data: Use dot notation (user.name) or bracket notation (user["name"]).
• Modifying data: Reassign a property value (user.age = 25).
• Adding data: Use dot or bracket notation to set a new key.
• Removing data: Use the delete operator.
• Checking properties: Use the "in" operator or hasOwnProperty() method.
• Looping: Use a for...in loop to go through all properties.
• Merging: Use Object.assign() or the spread syntax (...).
• Counting properties: Use Object.keys().

Always declare your objects with const to keep your references stable.

Source: https://dev.to/vidhya_murali_5aabe7784bd/objects-in-javascript-5600