JavaScript Archives

👩🏻‍💻 DOM Manipulation in jQuery

Learn DOM manipulation in jQuery! Understand how to modify elements and create dynamic content easily with jQuery.

🗣️ Introduction to DOM Manipulation in jQuery In web development, DOM manipulation is the process of changing the document structure, style, or content of a webpage. jQuery is a powerful JavaScript library that simplifies this process, making it faster and more intuitive than working with raw JavaScript alone. jQuery provides an easy-to-use API to interact with the DOM, which allows you to manipulate HTML elements, handle events, and create dynamic, interactive web pages. This tutorial will show you how to manipulate the DOM using jQuery, making it a breeze to work with HTML elements, styles, and user interactions. 💡 Understanding the DOM and jQuery ⁉️ What is the DOM? The Document Object Model (DOM) is a tree-like structure that represents the HTML […]

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Arash Javadi

4

107 Views

Post Date: 25/Feb/2025 || Written By: Arash Javadi

🧪 JavaScript Test by Jest: Step-by-Step Guide

Guide on using JavaScript Test by Jest Framework, covering installation, writing tests, and mocking DOM elements.

📝 Step 1: What is Jest? Jest is a JavaScript testing framework designed to make it easy to write and run tests. It was developed by Facebook and is used in major applications like React, Node.js, Twitter, Spotify, and Airbnb. It is one of the most popular testing frameworks today due to its speed, simplicity, and ease of setup. Jest allows you to test JavaScript code without requiring a browser, making it perfect for both front-end and back-end testing. ⁉️ How to Install Jest 🔰 To start using Jest in your project, follow these steps: Initialize your Node.js environment by running: npm init Install Jest by running: npm install –save-dev jest@26.6.3 After installation, verify that Jest is working by running: […]

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Arash Javadi

4

80 Views

Post Date: 24/Feb/2025 || Written By: Arash Javadi

🔬 Software Testing Tutorial

Software Testing Tutorial with the models of TDD, BDD, and Red-Green-Refactor cycle with examples.

🧑‍💻 Testing Paradigms of Software Tests: TDD vs BDD There are different ways to build and test code, with some of the most common paradigms being Behavior-Driven Development (BDD) and Test-Driven Development (TDD). These approaches are widely used in software development and are often mentioned in job advertisements. In this tutorial, we’ll focus on the TDD approach, but we’ll also touch on BDD, as these paradigms are often used together. 🧩 Behavior-Driven Development (BDD) Behavior-Driven Development (BDD) is based on testing the expected outcome of an action. It’s a manual testing approach where we test the application by interacting with it and verifying if it behaves as expected. BDD extends the concept of user stories by adding Given, When, and […]

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Arash Javadi

4

134 Views

Post Date: 23/Feb/2025 || Written By: Arash Javadi

📝 JavaScript Form Validation and Data Handling

JavaScript form validation! Learn how to get, prepopulate, and validate form data.

📝 Getting Form Data One of the most basic tasks when working with forms in JavaScript is retrieving the data entered by the user. You can easily access form data by selecting the form elements and using the value property. Example: <form id=”myForm”> <input type=”text” id=”name” name=”name” placeholder=”Enter your name”> <input type=”email” id=”email” name=”email” placeholder=”Enter your email”> <button type=”submit”>Submit</button> </form> <script> const form = document.getElementById(‘myForm’); form.addEventListener(‘submit’, function(event) { event.preventDefault(); // Prevent form submission to keep it on the page let name = document.getElementById(‘name’).value; let email = document.getElementById(’email’).value; console.log(‘Name:’, name, ‘Email:’, email); }); </script> In this example, when the form is submitted, JavaScript retrieves the values from the name and email input fields and logs them to the console. 🔄 Prepopulating […]

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Arash Javadi

4

91 Views

Post Date: 22/Feb/2025 || Written By: Arash Javadi

🖱️ Accessing an Event: List of Event Listeners JavaScript

Learn how to add, access, loop, and handle List of Event Listeners JavaScript effectively.

🎯 Introduction to Events in JavaScript In JavaScript, events are actions or occurrences that happen in the system, usually as a result of user interactions, such as clicking a button, typing on a keyboard, or moving the mouse. These events trigger the execution of specific event listeners. Event listeners allow JavaScript to “listen” for specific events and execute a function when those events occur. 📝 Adding Event Listeners The most common way to add an event listener in JavaScript is through the addEventListener() method. This method attaches an event to an element, allowing JavaScript to react to that event. Syntax: element.addEventListener(‘event’, function, useCapture); ‘event’ is the type of event (e.g., ‘click’, ‘mouseover’). function is the function that should run when […]

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Arash Javadi

4

126 Views

Post Date: 22/Feb/2025 || Written By: Arash Javadi

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