Updating objects in JavaScript is a common task when working with data. Whether you are developing a web application or simply manipulating data in your code, it's important to understand how to update objects effectively. In JavaScript, objects are a versatile data type that allows you to structure and store data in key-value pairs. When you want to update an object with new properties or modify existing ones, there are several ways to achieve this. Let's explore some of the techniques for updating objects in JavaScript. 1. Using Dot Notation: One way to update an object is by using dot notation. This involves accessing the object's property directly and assigning a new value to it. For example: let person = { name: 'John', age: 30 }; person.age = 31; // Update the 'age' property to 31 2. Using Bracket Notation: Another way to update an object is by using bracket notation. This allows you to access the object's property using a variable or expression. For example: let propertyName = 'age'; let person = { name: 'John', age: 30 }; person[propertyName] = 31; // Update the 'age' property to 31 3. Using Object.assign(): Object.assign() is a built-in method that allows you to copy the values of all enumerable own properties from one or more source objects to a target object. This can be used to update an object with properties from another object. For example: let person = { name: 'John', age: 30 }; let newInfo = { age: 31, city: 'New York' }; Object.assign(person, newInfo); // Update the 'age' property to 31 and add a 'city' property 4. Using the Spread Operator: The spread operator (...) can be used to create a new object with the existing properties of another object, and also add new properties to it. For example: let person = { name: 'John', age: 30 }; let newInfo = { age: 31, city: 'New York' }; person = { ...person, ...newInfo }; // Update the 'age' property to 31 and add a 'city' property These are just a few of the methods for updating objects in JavaScript. Depending on your specific use case, you may find one method more suitable than the others. By understanding these techniques, you can efficiently update objects in your JavaScript code and manipulate data with ease.