Adding objects in JavaScript is a fundamental skill that every developer needs to master. Objects are an important data structure in JavaScript, and being able to add, manipulate and use them effectively is crucial for building robust and efficient code. Here are some essential tips for adding objects in JavaScript's medium.1. Creating an Object: The simplest way to add an object in JavaScript is by creating it using the object literal notation. For example, let's create an object representing a person: const person = { name: 'John', age: 30, city: 'New York' }; This creates an object with three properties: name, age, and city, and their respective values.2. Adding Properties: You can add new properties to an existing object using dot notation or bracket notation. For example, to add a new property gender to the person object, you can use: person.gender = 'male'; or person['gender'] = 'male'; Both approaches will add a new property gender to the person object with the value 'male'.3. Modifying Properties: You can also modify the value of an existing property in an object. Simply access the property and assign it a new value. For instance, to change the age of the person object to 35, you can use: person.age = 35; Now the age property of the person object is updated to 35.4. Adding Methods: In JavaScript, objects can also contain methods, which are functions stored as object properties. You can add a method to an object by simply assigning a function to a property. For example, let's add a method to the person object to display a greeting: person.greet = function() { return `Hello, my name is ${this.name} and I live in ${this.city}.`; }; Now, the person object has a greet method that returns a greeting message using the object's name and city.5. Using Object.assign: If you need to add multiple properties to an object, you can use the Object.assign() method. This method copies all enumerable own properties from one or more source objects to a target object. Here's an example of using Object.assign() to add properties to an object: const info = { job: 'developer', hobby: 'coding' }; Object.assign(person, info); After this operation, the person object will have two new properties: job and hobby, with the values 'developer' and 'coding' respectively. These are some essential techniques for adding objects in JavaScript's medium. Understanding how to create, add, modify and use objects effectively is essential for writing clean and efficient JavaScript code. By mastering these techniques, you can make your code more organized, maintainable and scalable.