JavaScript

The Channel Messaging API provides a means of communication between iframes and the main document thread. This allows for the passing of messages between different contexts within the same document. Introduction to Channel Messaging API The Channel Messaging API enables communication between: The document and an iframe Two iframes Two documents How it works To initialize a message channel, you can use the new MessageChannel() method: const channel = new MessageChannel(); The channel has two properties: port1 and port2....

ECMAScript, often referred to as ES, is the standard on which JavaScript is based. In this guide, we will explore everything you need to know about ECMAScript and its latest features. What is TC39 TC39 is the committee responsible for evolving JavaScript. Its members consist of companies involved in JavaScript and browser vendors, including Mozilla, Google, Facebook, Apple, Microsoft, Intel, PayPal, SalesForce, and others. To propose a new standard version, it must go through various stages, all of which are explained here....

In JavaScript, the concat() method is used to concatenate strings. It combines the current string with the string passed as a parameter. Usage Example Here’s an example to demonstrate the usage of the concat() method: console.log('Flavio'.concat(' ', 'Copes')); // Output: Flavio Copes In this example, the concat() method is used to concatenate the string ‘Flavio’ with the string ‘Copes’. The result is the combined string ‘Flavio Copes’. Concatenating Multiple Strings The concat() method can also concatenate multiple strings together....

Introduction State management is a crucial aspect of every application, especially in React. While hooks like useState() and prop passing can take us quite far, complex scenarios often call for a dedicated state management library. One such library I’ve come to appreciate is the easy-peasy library, built on top of Redux. With its simplified approach to handling state, it allows for cleaner and more manageable code. Installation To start using easy-peasy, simply install it using the following npm command:...

The defineProperty() method in JavaScript is a powerful feature of the Object object. It allows you to create or configure properties for an object in a more flexible way. In this blog post, we will explore how to use the defineProperty() method and provide examples to demonstrate its usage. Overview The defineProperty() method serves two main purposes: creating a new object property or configuring an existing property. It offers more control and customization compared to simply assigning a value to a property....

The Document Object Model (DOM) is a representation of an HTML document in nodes and objects. It is the browser’s internal structure that allows developers to interact with and manipulate the web page. Modern JavaScript frameworks heavily rely on the DOM API to control the elements displayed on the page. When a browser retrieves an HTML document from a server, it analyzes the structure of the code and creates a model of it known as the DOM....

Looking back at the last decade of JavaScript and the evolution of the web, it has been a truly remarkable journey. In 2010, JavaScript wasn’t as widely used as it is today. While I had JavaScript books from as early as 1998 in my library, I mainly used it in the form of Mootools and jQuery plugins. Although I wrote some glue code in JavaScript, it wasn’t anything groundbreaking. Back then, JavaScript was not considered a hot language, except for projects like GMail and Google Maps that required advanced work and large budgets....

Learn about the File object and how to utilize it Browsers provide us with a File object. The File object is a Blob object and has 3 properties: name (a String) lastModified (the UNIX timestamp of the last modified date time) These properties are in addition to the Blob object properties: size (the size in bytes) type (the MIME type) You will receive a File object when interacting with the FileList object, which can be obtained from an HTML form using an <input type="file" /> element or when working with Drag and Drop....

In JavaScript, the getPrototypeOf() method is used to retrieve the prototype of an object. It allows you to access the object’s parent or prototype. Usage The getPrototypeOf() method is called on the Object object and takes one parameter, obj, which is the object whose prototype you want to retrieve. Object.getPrototypeOf(obj) Example Here’s an example that demonstrates the usage of the getPrototypeOf() method: const animal = {} const dog = Object.create(animal) const prot = Object....

The package.json file is an essential component in many Node.js-based app codebases. If you work with JavaScript or have interacted with a JavaScript project, Node.js, or a frontend project, it’s likely that you are familiar with the package.json file. But what exactly is it for? What should you know about it, and what can you do with it? In this guide, we will explore the package.json file, its structure, and its properties....