Skip to main content

Apply object based programming with java script and event handling

 .

Object-Based Programming with JavaScript:

JavaScript is an object-based programming language, which means that it is built around the concept of objects. In JavaScript, an object is a collection of properties and methods that are used to represent real-world entities or concepts.

For example, you could create an object called "car" that has properties such as "color", "make", and "model", and methods such as "start" and "stop" that are used to control the car.

Here is an example of how to create a car object in JavaScript: 
javascript
let car = { color"blue"make"Toyota"model"Corolla"startfunction() { console.log("Starting the car"); }, stopfunction() { console.log("Stopping the car"); } };

Event Handling with JavaScript:

Event handling is a key aspect of web development, as it allows you to respond to user actions such as clicks, scrolls and keystrokes. In JavaScript, you can use event handlers to listen for and respond to events that occur on a web page.

For example, you create an event handler that listens for a button click and them performs a specific action, such as showing a message or changing the color of an element.

Here is an example of how to create an event handler in JavaScript:
javascript
let button = document.querySelector("button"); button.addEventListener("click"function() { console.log("The button was clicked"); });
In this example, we select a button element using the querySelector method, and then add an event listener using the addEventListener method. When the button is clicked, the function we provide as the second argument to addEventListener will be executed, which logs a message to the console.

Combining Object-Based Programming and Event handling:

You can use object-Based Programming and event handling together to create interactive web applications that respond to user input.

For example, you could create a car object that has a method for starting the engine, and then use an event handler to listen for a button click and call the start method when the button is clicked.

Here is an example of how to combine object-based programming and event handling in JavaScript;
less
let car = { color"blue"make"Toyota"model"Corolla"startfunction() { console.log("Starting the car"); } }; let button = document.querySelector("button"); button.addEventListener("click"function() { car.start(); });
In this example, we crate a car object with a start method that logs a message to the console. We then select a button element using querySelector and add an event listener that calls the car object's start method when the button is clicked. When the button is clicked, the start method will be executed and the message "Starting the car" will be logged to the console.

Comments

Popular posts from this blog

Important Questions of Data Structure and Algorithm (DSA)

 . 1. What is Data structure? Explain different operations to be performed on data structure. 2. Define stack as ADT. Convert P+Q-(R*S/T+U) - V*W into infix expression to postfix. 3. Define Queue. Explain its type with example. 4.  Difference between stack and Queue. 5. Difference between Linear Queue and circular Queue. 6. Write an algorithm to enqueue and dequeue data element in a circular queue.                              7. Define Linked List. Explain its type. How does double linked List is different from circular linked   List. 8. What is recursion and recursive function? write a recursive function to compute Fibonacci number. 9. What is an AVL tree ? Create an  AVL tree from the following data:      18, 12, 14, 8, 85, 25, 31, 24, 27 10. Define B-tree? How to insertion and deletions of elements can be done in a B-tree. 11. Create an B-tree from the following Data:  ...

Define LAN and WAN

 . Local Area Network (LAN)  A LAN is a network that is used for communicating among computer devices, usually within an office building or home.   LAN’s enable the sharing of resources such as files or hardware devices that may be needed by multiple users • • Is limited in size, typically spanning a few hundred meters, and no more than a mile.  Is fast, with speeds from 10 Mbps to 10 Gbps.  Requires little wiring, typically a single cable connecting to each device.  Has lower cost compared to MAN’s or WAN’s.  LAN’s can be either wired or wireless. Twisted pair, coax or fiber optic cable can be used in wired LAN’s. Advantages of LAN :    The data is transferred at an extremely faster rate in local Area Network.  Local area network (LAN) provides higher security. Disadvantages of LAN :   Initial cost of installing local area network is quite high.  Unauthorized user can access critical data of an organization in case LAN ad...

Introduction of Computer

.  A computer is an electronic device. It take input and store the data in memory and performing the function to produce accurate result in output device. It is used to type document, send email, play game, browse the web and entertainment.   Characteristics of computer  1 . High speed  Computer is very fast device. It is capable of performing calculation of very large amount of data. The computer has unit of speed in microsecond, nanosecond and even in picosecond. The computer is capable of performing millions of tasks per second. 2. Accuracy  The computer produces highly accurate and reliable result.  It does not make any kind of mistake in calculating. The calculation are 100% error free. The computers perform accurate 'n' number of times. 3. Storage capability A computer has much more storage capability. It can store large amount of data. It can store any type of data such as image, video, text document, audio and many more. 4. Diligence Diligence ...