Object Properties and Methods in JavaScript

Key Concepts

• Object Properties
• Object Methods
• Accessing Properties and Methods

Object Properties

Object properties are the key-value pairs that define the characteristics of an object. Properties can hold any type of data, including numbers, strings, arrays, and even other objects.

Example: Imagine a car object with properties like color, model, and year.

        let car = {
            color: "red",
            model: "sedan",
            year: 2020
        };
    

Object Methods

Object methods are functions that are stored as object properties. They allow objects to perform actions or behaviors. Methods are defined using function expressions.

Example: Continuing with the car object, you might want to add methods like start and stop.

        let car = {
            color: "red",
            model: "sedan",
            year: 2020,
            start: function() {
                console.log("The car has started.");
            },
            stop: function() {
                console.log("The car has stopped.");
            }
        };
    

Accessing Properties and Methods

Properties and methods of an object can be accessed using dot notation or bracket notation. Dot notation is more common and straightforward, while bracket notation is useful when the property name is stored in a variable.

Example: Accessing the car's color property and invoking the start method.

        console.log(car.color); // Outputs: red
        car.start(); // Outputs: The car has started.
    

Examples and Analogies

Think of an object as a real-world entity, like a car. The properties are the attributes that describe the car (color, model, year), and the methods are the actions the car can perform (start, stop). Accessing these properties and methods is like inspecting the car's features and controlling its functions.

Conclusion

Understanding object properties and methods is crucial for working with objects in JavaScript. By defining and accessing these properties and methods, you can create dynamic and interactive objects that perform specific tasks and hold valuable data.