JavaScript

Promises are a powerful tool for dealing with asynchronous code in JavaScript, allowing you to avoid the callback hell. In this blog post, we will explore how to use promises, including creating promises, consuming promises, chaining promises, handling errors, and orchestrating promises. Introduction to Promises A promise is a proxy for a value that will eventually become available. It provides a way to work with asynchronous code without writing too many callbacks....

One of the most popular libraries for working with Redis server in a Node.js application is node-redis, which can be found at https://github.com/NodeRedis/node-redis. To install the library in your project, run the following command: npm install redis Tip: If your project is brand new and does not have a package.json file, make sure to run npm init -y first. Connecting to the Redis Instance Once the library is installed, require it in your project using:...

The Geolocation API is a powerful tool for retrieving a user’s position coordinates in a browser. In this guide, we’ll explore how to use this API effectively. Introduction to the Geolocation API To access the Geolocation API, we can utilize the navigator.geolocation object exposed by the browser. It’s important to note that this API is only available on pages served over HTTPS for security reasons, and it’s supported on all modern browsers....

The Node.js REPL (Read-Evaluate-Print-Loop) is a powerful tool for quickly exploring and testing Node.js features. This guide will show you how to use the Node.js REPL effectively. Running the Node.js REPL To start the Node.js REPL, open your terminal and execute the node command without specifying a file: node This will start the REPL, and you’ll see a prompt (>). The REPL is now ready to accept and evaluate JavaScript code....

The confirm() API provided by browsers allows us to ask for user confirmation before performing certain actions. This widely supported API has been around since the early days of the Web and can be a handy tool in various scenarios without the need for a custom-built user interface. To use the confirm() API, simply call the function and pass a string representing the confirmation message that you want to display to the user....

Discover how to utilize the top-level await feature in JavaScript, which is currently available in v8. Typically, you can only use await inside async functions. As a result, it’s common to declare an immediately invoked async function expression to wrap it: (async () => { await fetch(/* ... */); })(); Alternatively, you can declare a function and then call it: const doSomething = async () => { await fetch(/* ... */); }; doSomething(); However, with the introduction of top-level await, you can simply run:...

ES modules, which provide a modular approach for organizing and loading JavaScript code, can be used in Netlify Functions to enhance the functionality and maintainability of serverless functions. This guide will walk you through the steps to enable ES modules in Netlify Functions. To begin, make sure you have a package.json file at the root level of your repository. Open the package.json file and add the following line: "type": "module" This line informs the Node....

Validating an email address is a common operation when processing a form. Whether it’s for contact forms, signup forms, or login forms, it’s important to ensure that the email address entered by the user is valid. In this blog, we will explore the correct way to validate an email address using plain JavaScript. Rules for Email Validation An email address is composed of two parts: the local part and the domain part....

When working with JavaScript arrays, it is quite common to need to check if a particular item is present. Fortunately, JavaScript provides us with a handy method called includes() that allows us to perform this check easily. To use the includes() method, you simply call it on the array instance, followed by the value you want to check for. The method returns true if the item is found in the array, and false otherwise....

In JavaScript, there are situations where we need to wait for multiple promises to resolve before continuing the execution of our code. Instead of waiting for one promise to resolve and then starting the next one, it would be more efficient to start all the promises simultaneously and wait for all of them to finish. In this blog post, we will discuss how to achieve this using the await keyword and the Promise....