Coding Help Tips Resources Tutorials
Google Apps Scripts and Web Development Tutorials and Resources by Laurence Svekis
JavaScript has 7 primitive data types: In addition to primitive data types, JavaScript also has object and array data types. Hoisting is a JavaScript feature that causes all variable declarations and function declarations to be moved to the top of their scope, even if they are not actually defined until later in the code. This … Read more
The given code demonstrates a simple game where a player can move around a canvas using the arrow keys. Let’s break it down step by step: const canvas = document.getElementById(“canvas”); const ctx = canvas.getContext(“2d”); const player = { x: 250, y: 250, width: 50, height: 50, speed: 5 }; function movePlayer(event) { // Move the … Read more
In JavaScript, setInterval() is a method used to repeatedly execute a function or a piece of code at a specified time interval. It takes two parameters: the function to be executed and the time delay (in milliseconds) between each execution. Here’s an example that demonstrates the usage of setInterval(): // Define a function to be … Read more
Here’s an example of how you can select all input fields in HTML using JavaScript and store their values in an object: HTML: <!DOCTYPE html> <html> <head> <title>Input Fields Example</title> </head> <body> <input type=”text” id=”name” placeholder=”Name”> <input type=”text” id=”email” placeholder=”Email”> <input type=”text” id=”phone” placeholder=”Phone Number”> <button onclick=”collectInputs()”>Submit</button> <script src=”script.js”></script> </body> </html> JavaScript (script.js): function collectInputs() … Read more
URLSearchParams is a built-in JavaScript class that provides a convenient way to manipulate and extract query parameters from a URL string. It allows you to parse, modify, and construct query strings easily. This class simplifies tasks such as retrieving and updating query parameters in a URL. Here’s a detailed explanation of URLSearchParams with examples: const … Read more
The fetch() method in JavaScript is used to make network requests and retrieve resources from a server. It returns a Promise that resolves to the response of the request, allowing you to handle the response data in various ways. Here’s an example of using the fetch() method to make a GET request and retrieve data … Read more
To link a JavaScript file to an HTML document, you can use the <script> tag. Here’s the step-by-step process: <script src=”path/to/your/script.js”></script> Replace “path/to/your/script.js” with the correct path to your JavaScript file. Make sure to include the JavaScript file after the <body> tag or use the defer attribute if you want the script to load after … Read more
Question 1: What is the difference between null and undefined in JavaScript? Answer: In summary, null is used to explicitly assign an empty value, while undefined is used when a variable has been declared but not assigned a value. Question 2: What is hoisting in JavaScript? Answer: Hoisting is a JavaScript behavior where variable and … Read more
Introduction In the dynamic world of web development, JavaScript plays a vital role in creating interactive and engaging websites. Whether you’re a beginner taking your first steps or an experienced developer looking to enhance your skills, mastering JavaScript coding is essential for building powerful web applications. In this article, we will explore the key concepts … Read more
The getBoundingClientRect() method in JavaScript returns a DOMRect object that represents the position and size of an element relative to the viewport. The properties of the DOMRect object include coordinates and dimensions, which are often expressed as floating-point numbers (decimal places). The reason getBoundingClientRect() returns decimal values is because it provides sub-pixel accuracy. In modern … Read more