JavaScript Form Validation and Data Handling

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

πŸ“ 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 […]

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πŸ–±οΈ 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. πŸ“ 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: […]

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πŸ•΅πŸ»β€β™‚οΈ JavaScript Debugging with DevTools

Debugging with DevTools in JavaScriptpt, showing breakpoints and stepping through JS code to fix bugs.

πŸ” What is Debugging and Why is It Important? Debugging is a critical skill for any web developer. When you’re working with JavaScript, HTML, and CSS, bugs can creep into your code. These bugs can break functionality or cause unwanted behaviors in your web application. Fortunately, Chrome DevTools provides a powerful set of tools to help you identify and fix these issues effectively. In this post, we’ll dive into how to use DevTools to debug JavaScript code and walk you through practical examples of setting breakpoints, stepping through your code, and fixing bugs. Let’s get started! πŸ”§ Opening the JavaScript […]

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🧩 JavaScript elements list

Different JavaScript elements list, including how to get, change, and manipulate HTML elements, styles, and attributes.

πŸ—£ In this post you will get familiar with JavaScript elements! Learn how to get, change, and manipulate HTML elements, styles, and more. πŸš€ πŸ†” Getting Elements by ID One of the most common ways to access HTML elements in JavaScript is by using the getElementById() method. This method allows you to get an element by its unique ID. Example: let element = document.getElementById(“myElement”); element.innerHTML = “New content here!”; ✏️ Changing HTML Content You can modify the innerHTML property of an element to change its content dynamically. Example: document.getElementById(“header”).innerHTML = “Updated Header Text!”; 🎨 Changing Styling JavaScript allows you to […]

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πŸš€ Advanced JavaScript Concepts

Advanced JavaScript concepts including ternary expressions, arrow functions, and browser integration.

Ternary Expressions in JS Concepts❓ A ternary expression in JavaScript is a shorthand for an if…else statement. It evaluates a condition and returns one value if true and another if false. Syntax: condition ? expressionIfTrue : expressionIfFalse; Example: let age = 18; let status = (age >= 18) ? “Adult” : “Minor”; console.log(status); // Outputs: Adult Arrow Functions in JS Concepts πŸ“ Arrow functions provide a more concise way to write functions in JavaScript. They use the => syntax and have implicit returns for single expressions. Syntax: const functionName = (parameters) => { /* code */ }; Example: const add […]

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