Reversing a JavaScript array can be done using a few different methods. In this article, we will explore the different ways to achieve this. Let’s start with an example array called list: const list = [1, 2, 3, 4, 5]; The easiest and most intuitive way to reverse an array is by using the built-in reverse() method. This method directly alters the original array, so you can call it directly on list:...
In this blog post, I will guide you on how to slugify a string in JavaScript. Slugification is the process of transforming a string into a URL-friendly format, typically used for creating clean and readable URLs. To accomplish this, I will provide you with a snippet of code that can be used to slugify a string: export function slugify(str) { // Remove leading and trailing whitespace str = str.trim(); // Make the string lowercase str = str....
In JavaScript, there is a simple way to split a string into separate words using the split() method. With the split() method, we can define the delimiter, which determines where the string should be divided. Here’s an example of how to use the split() method to cut a string into words when a space is encountered: const text = "Hello World! Hey, hello!"; text.split(" "); The split() method returns an array, and in this case, it will produce an array with four items:...
In this blog post, we will explore different ways to apply styling to DOM elements dynamically using plain JavaScript. Whether you need to change the color, border, or any other CSS property of an element, we’ve got you covered. Adding and Removing Classes One of the cleanest approaches to styling elements is by using classes in your CSS. To apply or remove classes from an element, you can utilize the classList property along with its add() and remove() methods....
Swapping two elements in an array may seem challenging, but it’s actually quite simple in JavaScript. In this article, we will explore two methods to accomplish this task. Method 1: Using a Temporary Variable Let’s assume we have an array a with five elements: ['a', 'b', 'c', 'e', 'd']. Our goal is to swap the element at index 4 ('d') with the element at index 3 ('e'). To achieve this, we can follow these steps:...
When writing JavaScript, some developers prefer not to use semicolons for a cleaner code. However, there are situations where we need to be careful, especially when using the require() function in Node.js to load external modules and files. In certain cases, you may encounter an error like this: TypeError: require(...) is not a function This error can be a bit confusing. Let’s go over how this error can occur. For example, let’s say you require a library and then need to execute some code at the root level using an immediately-invoked async function:...
Learn how to upload files to a server using the Fetch API in a simple and straightforward way. Uploading files to a server can sometimes be a challenging task that requires hours of research. In this tutorial, I will guide you on how to upload files using the Fetch API. To begin, let’s assume you have a form with a file input field: <input type="file" id="fileUpload" /> To handle the file upload, we’ll attach a change event handler to the file input field:...
Uploading files and processing them in the backend is a common functionality in web applications, such as uploading avatars or attachments. In this article, we will learn how to upload files to the server using JavaScript. Uploading Files Client-Side To enable file upload functionality in our web app, we start by adding an HTML file input element: <input type="file" id="fileUpload" /> Next, we register a change handler on the #fileUpload DOM element....
Capitalizing the first letter of a string in JavaScript is a common operation that can be achieved using different methods. In this blog, we will explore the various ways you can accomplish this task using plain JavaScript. To capitalize the first letter of a string, we can combine two functions. The first function, charAt(0), returns the first character of the string. We then use the toUpperCase() function to convert this character to uppercase....
In this blog post, I will guide you through the process of redirecting to a new URL using JavaScript. Specifically, I will address a use case where you want to track the number of people who subscribe to your newsletter as a “goal” in your analytics. Previously, you may have used Google Analytics, which allows you to set up “funnel goals.” These goals involve visiting specific pages in a specific order....