Javascript objects consist of key-value pairs and are one of the most common data structures in Javascript.

TypeScript provides you with multiple ways to define type definitions for object properties. We'll look at a couple of them throughout this post.

Do you need to know how to disable JavaScript in Tor? This would be easier you could imagine!

Cleanup functions in React’s useEffect hook allow us to stop side effects that no longer need to be executed in the component.

Although JavaScript is now the most widely used programming language worldwide, it is not usually the first language picked for building a blockchain

This tutorial will explore how to create a GraphQL server and client with Next.js to provide a more efficient and flexible development experience for our users.

In conclusion, the Single Responsibility Principle (SRP) is a software design principle that states that every class should have only one reason to change.

Have you ever felt like you needed to start over and press the refresh button?

I'd like to share some useful JavaScript stuff I have saved

Ever wondered why Google shows you content based on your location, or ads you see on websites are customized to your location? All this happens because of geolocation which makes it possible to identify the country, state and sometimes even the city based on your IP address of your device.

Learn how to seamlessly deploy your NestJS server applications using Render, a powerful alternative to Heroku.

The script tag is the primary method to insert JavaScript into the HTML page. We will look at all the ways to use the script tag and the importance of each.

Universally Unique Identifiers (UUIDs) are used everywhere in software development for everything from identifying object elements to DOM elements on a web page

In this quick guide we'll look at how you can solve the very common error, "Uncaught SyntaxError: Cannot use import statement outside a module".

CSS customisation support, CSS hacks and tricks, JS solutions and criteria to choose JS libraries

In this post, we’ll look at using Redis to give cache capabilities to a NestJS project. We’ll discuss Redis, what caching is, and the implementation procedure.

In this article, we will be creating an accordion with vue.js. It is used mostly for expandable FAQ sections in websites.

An example that demonstrates using NestJS as a base framework for building lightweight, well-structured and amazing microservices.

Learn how to build a custom toast notification component in React using Context API. Add progress bar, pause on hover, and dismiss button functionality.

Understand Javascript Spread and rest operators

Master key Node.js concepts: closures, prototypes, modules, error handling, currying, 'apply/call/bind', memorization, IIFE, and advanced arguments.

Console statements create performance or security issues if you mishandle them. This article explains three ways to remove them from your production build.

A simple tutorial to learn Encryption in NodeJS.

Hence, in this article, we will see how to create an isObject function and use it to check if an object is actually an object. So, let's get started!

In this article, I will show you how you can use zk-SNARK in your JavaScript project by using circom and snarkjs.

Did you know that you can use hooks in class components?

We've had a lot of digital image processing tools for a long time: Photoshop, Lightroom, GIMP, PhotoScape, and many more. However, in the past few years, one became popular among non-expert users due to its easiness of use and social features: Instagram. Have you ever wondered how Instagram filters work? It is actually pretty simple matrix operations! So simple we can build our own without any external library, just pure and simple HTML + JS. Let's build one now.

How to Print images with TSPL and JavaScript

Let's implement the Password component in React, supporting 5 validation rules.

Build a tutorial blog with React and Markdown. Enhance your blog's user experience with syntax highlighting, dark mode and copy to clipboard functionality.

If you've ever worked in vanilla Javascript, you might be familiar with adding event listeners to elements using the following formula:

We've all been in a situation in Javascript where we have a set of data, all with different dates, which we want to sort by date quickly.

JavaScript arrays are data types that can store a collection of elements. These elements can be of any data type, including numbers, strings, and objects.

In this article, we will show you how to integrate Foxit PDF SDK with your system to perform accurate full-text search on a PDF document.

In this article, we’ll be diving deep into the topic of URL parsing in JavaScript and understanding how to access certain data from a URL string.

Can you learn React in five minutes? Well, it depends on what you mean by “learn React”. In this blog post you will “learn the basics of React” in five minutes!

When it comes to programming on the web, very few languages can measure up to the immense popularity of JavaScript. Countless websites make use of JavaScript for the user experience, making its appearance on the Internet almost universal. Even if programmers never learn another language in their life, they can still make incredible use out of this one. Both newcomers and experienced programmers will want to check out these 6 best JavaScript programming books ranked by Amazon reviews.

!3 best hidden open-source libraries to make you an AI wizard

The Promise.all method in Javascript is a function that accepts many promises and then does something only after they have all been settled.

React Hooks are a new feature in React 16.8. They are a powerful way to write stateful components. All this power comes at a cost, however.

Creating the "Who's that Pokemon" segment from the anime as a web game can be easily done with just 70 lines of javascript and with the help of an API

Dive into JavaScript objects: from basics to advanced techniques, learn creation, manipulation, inheritance, and utility functions for mastery.

Improve user experience with a skeleton loader in React. Mimic page layout with placeholder boxes for text and images while actual content loads.

At the heart of most guitar tuners is some sort of pitch detection algorithm. Here we focus on zero-crossing, fast fourier transform, and autocorrelation.

Have you ever wondered how hard or easy it would be to create your own screen-sharing application? Learn how today using HTML, CSS & JavaScript.

There are two ways of conducting Object Creation in Javascript, Object.create and New operator. While very similar they do have their subtle differences.

Form validation is a way of making your form input secure by not letting any malicious code in your website.

This will enable finding and fixing Ajax errors using Network Tab! Once this is resolved your JavaScript Ability will be legit!

Redis is a powerful piece of technology that lets us store data in memory. Let's look at how to use it with Node.JS

We'll delve deep into the enigma of multiprocessing in Node.js, armed with riveting code examples.

Learn how to import and export Excel XLSX files using Vue. See more from SpreadJS today.

The article is about the bare minimum basics to learn JavaScript for testing APIs with the Postman tool.

The spread operator, spread syntax or 3 dots (...), is a type of syntax in Javascript that is used by both function calls and arrays/objects.

Tutorial for a Discord bot that automatically saves messages from a Discord server to Notion, if an Admin reacts to them with a specific emoji, say ✍️.

Learn how to add a prefix or suffix to each new line in JavaScript with our step-by-step tutorial. Create a user-friendly online tool using JS.

The javascript slice function is a built-in array or string method that returns a shallow copy of a portion of an array into a new array object.

Updating an Alpine.js project to support updating and restoring state via URL parameters.

When we talk about default parameters, we are talking about giving arguments values that should be used, if that argument is undefined.

Steganography is a method of hiding secret messages in another, non-secret file. This article describes how to implement such an encoding engine using JS.

I will try to tell with a simple example of how TS can be applied, and how to solve seemingly complex problems step by step.

Struggling to convert code into projects? Follow this tutorial to build an amazing drum kit project in Vanilla JavaScript by the time you finish reading it

Optional chaining is a feature in Javascript which lets us access the child properties of an object, even if the parent object doesn't exist.

Manage JavaScript 'monorepos' with Lerna, Build a React Icon Library & Publish to NPM

Build a minimal Node.js application that tracks real-time weather data from WeatherAPI.com using a Node.js application and ingests it into Apache Cassandra.

Creating a profile page in React is not only essential but also super fun! It lets your users view and manage their personal info in style.

In this tutorial, we will start with creating the game board.

Chrome dev tools are a must have tools for modern day developers. Take your first step learning chrome dev tools by learning source debugger.

Sometimes you just need to have a look at a specific file in your archive and you don't want to install additional software to do this. 7zip.html solves this.

In Javascript, we have lots of different ways to manipulate DOM elements. Here, we take a look at one of the simplest ways to do so.

A short post on how to generate dynamic open graph images using puppeteer-core and chrome-aws-lambda for sharing on instant messaging platforms online.

We need to convert callback to promise because the promise is more readable and easier to handle.

For those new to coding or even experienced coders, this guide details how to manipulate text strings, just like the pros.

Create custom Instagram filters using React and CSS. Adjust contrast, brightness, saturation, apply the sepia effect or convert images to grayscale.

Article about useful Array methods in JavaScript.

Using Javascript to build a calculator for the cost of assembling model trains by combining API functions and a Wordpress site to streamline the process.

Checkout the various React Design Patterns to use in building React components that are extensible and reusable for your next React project.

This article dives into learning duck typing in Javascript and examples of polymorphism.

Explore the dynamic world of web development with a deep dive into three popular JavaScript templating engines-Pug, Handlebars, and EJS.

In this tutorial, we're gonna build a really simple game of Rock Paper Scissors Spock Lizard.

Learn how to create a Telegram bot with Node.js. Follow simple steps to set up, write code, handle messages, and add interactive features.

The importance of web and mobile apps that can handle massive volumes of data has skyrocketed over the past few years. As a result, small and large enterprises want to make the most of their data for monitoring and better decision-making.

Learn how to create a simple and a more complex popup chatbot using OpenAI and Websockets.

Read about the 10 must-know JavaScript array functions.

Here are some simple steps to build your Audio, Video and Screen Recorder with JavaScript and HTML with MediaRecorder, getUserMedia, getDisplayMedia

Syntax of if else, else-if, nested if, and logical operators like AND OR and NOT in Javascript. Switch statement can be used as an alternate to If statement.

When a React application is optimized, loading times are significantly reduced, allowing users to quickly access content and start interacting without unnecessa

A Comprehensive Guide To Creating and Publishing Your First NPM Package

Learn how to use the updated discord.js library and make your own Discord bot.

We learned how to implement such a function with a for loop and how to use it in various situations.

Enhance user experience in Angular with captivating loading spinners for observables. Elevate your app's responsiveness today!

I want to show you how using destructuring and inline types in TypeScript makes your codebase less readable!

Learn how to use Appwrite’s API and Svelte to create a list app with features like task creation and deletion and storing the data in Appwrite Cloud.

The JS reduce method is a recursive way to perform a computation based on every element in the array while considering the previous elements of the array.

Take a deep dive into file handling in JavaScript, starting by exploring how files work, how to access them, how to upload them to a server, and some third-par

In this article, I will be sharing how I made a Background Color Switcher Project. The project is a background color switcher in which there are multiple color

Next.js is a framework built on React that gives frontend developers the flexibility of creating modern and scalable apps

Welcome to other chapters of Let’s Understand Chrome V8

In React Native, the FlatList component works well to render a long list of data.

Master JavaScript naming conventions for cleaner code! Explore guidelines for variables, functions, classes & more. Enhance readability & collaboration.

The slice method on arrays returns a shallow copy of a part of an array. It takes two numbers, a start, and an end. Every array has a slice method.

In Javascript, we have numerous ways to check if something is or is not a number.

Nullish coalescing vs or operator explained and why it will help keep out bugs out of your code.

After exams and lots of procrastination, I finally resumed my #100DaysOfCode journey with JavaScript

The ABCs of Javascript are: A - apply(), B - bind(), and C - call(). Using them, we can set what 'this' should refer to.

With React/Next.js, the fundamental problem you’re solving is that of turning some notion of ‘state’ into DOM, with a focus on composability

Learn how to improve the performance of your web application by caching API requests with Redis and Node.js. Reduce response time and increase efficiency by sto

Did you know that Javascript does not class a selection of multiple elements as an array?

Defining a new object in Javascript is pretty easy - but what if you want to find out if it's empty?

A look at writing a web application that can save it's state to the URL, making it easier to share state with others.

Sometimes I find myself going through the same steps when I work on different projects. These are just some of the things I've found helpful over the years.

Web developers who want to build an application using ReactJS must consider the react file upload to ensure that users can upload any file they need.

Master state management in React using Context API. This guide provides practical examples and tips for avoiding prop drilling and enhancing app performance.

nvm is used to manage the versions of Node.js installed on your computer, so it's a really useful tool.

A/B Experiments with Statsig Layers

How you can use Next.js and Cosmic to create special web pages such as restaurant websites that include restaurant menus that have many images and animations.

"Let's Understand Chrome V8" are serial technology articles that explain the V8 code, it covers many V8 kernel functions and fundamentals.

A simple tutorial for beginners to create an object detector with NextJs.

Nullish coalescing is a new feature that helps make that a whole lot easier. In this post, we’ll explain nullish coalescing.

Learn the basics of DOM manipulation with Vanilla JS including set up, document.createElement(, .textContent, and more.

Building the classic Blackjack experience in Alpine.js.

Optional chaining is a modern language feature that allows you to safely navigate through and access deeply nested object properties.

Web developers have many reasons to read uploaded file content in JavaScript.

JavaScript Localization Guide

Memoization is a technique that saves the results of executing functions to avoid recalculations. In this article, we will use this to find Fibonacci numbers.

Learn how to leverage OpenAI to quickly build an AI-powered moderation system that automatically detects and filters toxic comments.

Build a real-time event-driven app with Node.js and Kafka on Heroku. Follow this step-by-step guide to set up, deploy, and manage your application efficiently.

In this blog post, we’ll discuss various methods, from the simple and direct to the more sophisticated and efficient.

What is the best programming language to learn for a developer? Can’t name the best, but yes, Java is surely one of the Best! You can dive in for the reasons.

A Set in Javascript is a unique list of values, similar to the set data type in Python.

Promise is a common object in JavaScript but is pretty complicated to use when it's the first time you see it. Learn about promises and the basics of using it!

The essence of currying is simple: to take a function of any arity (number of expected arguments) and make it into a unary function.

Javascript arrays can contain duplicates - which is fine most of the time, but can sometimes cause some issues.

In JavaScript, things can be true, or false, but they can also be truthy or falsy.

Have you ever been in a situation where you had a string of text and wanted to replace all of its occurrences with something else?

Learn how to build a web scraper with Javascript and Node.js. Add anti-blocking techniques, a headless browser, and parallelize requests with a queue.

5 Must-Know Features in JavaScript ES2022: Enhance Your Code and Boost Your Productivity

The answers to every what, why, when, and how about Static Code Analysis in JavaScript. Information about in-depth scanning, guard rails, and more.

In Chrome V8, the parser works with the scanner to create tokens to understand what functions it needs to carry out next, letting the browser work as intended.

In this article, we will be building a simple version of Tic Tac Toe using HTML, CSS, and JavaScript.

The logical OR operator in JavaScript is an operator which returns the left-hand side if it is truthy, but otherwise defaults and return the right-hand side.

This article will cover the spread operator and how you can use them in your day to day JavaScript programming. This article assumes you have some familiarity with coding in the JavaScript ecosystem.

In this article, we will keep debounce for what it is good at (UI smoothing), then harden the request path with cancellation, retries, and better error handling

"Let's Understand Chrome V8" are serial technology articles that explain the V8 code, it covers many V8 kernel functions and fundamentals.

Let's create a function that will return true if string is a prime number and return false if a number is not a prime.

This article will focus on how to use JavaScript to make use of some properties to achieve infinite scroll.

Here we talk about two of the functions available on the console object: console.table() and console.trace().

Here is a list of pretty much any action you would want to perform on an array, and how to do it in Javascript.

In this article, you will learn how to implement the following coding practices to differentiate between Synchronous and Asynchronous Calls.

Fetching should be predictable, reusable, and efficient. In real-world apps, it’s about: avoiding unnecessary requests and handling errors properly

A waitlist application is used by agencies, companies, marketing campaign websites, and many more to collect user data from a website.

Struggled with JS hoisting in interviews? How let, var, const and function hoist differently? This article explains the concept and makes it easy to understand.

TypeScript Records are a great way to ensure consistency when trying to implement more complex types of data.

A simple guide for updating for npm packages.

"Mastering Conditionals in JavaScript: A Comprehensive Guide with Example"

Learn advanced front-end debugging: use console log levels, CSS styles, assertions, and more to simplify and enhance your development workflow.

The specifics of how console object works vary from browser to browser, but there is a de facto set of features that are typically provided.

Welcome to other chapters of Let’s Understand Chrome V8

Make complex data easily digestible with these 3 simple charts.

Power up your logging and build good developer habits. As your codebase grows you'll need to debug it more easily and one tool is logging.

Adding auto caching to our JS template engine: How Caching Works with JS Template Engines; Changing Your Render Function.

Before I became a programmer I loved to play games. I played games for many years before I even knew the most basic concepts about coding. However these days I see that people are trying to introduce their kids to programming and looking for ways to make programming concepts more approachable. I think that using existing games people love is a great way to do just that. That is why I wanted to start this new coding for gamers blog series. In this tutorial I will show you how to do that by walking you through the process of extracting a feature from a video game called The Long Dark and recreating it on your own.

Do you know Javascript? The language we all love has some weird and sometimes unexpected behaviors.

If we want to delete items from an array, we can use the splice method that all arrays have. Let's look at how it works.

This is a article for beginners to understand JavaScript Execution context

JavaScript often referred to as JS, is the most useful and popular object-oriented, interpreted programming language

JavaScript Event Loop is a fundamental concept. In this tutorial, we will know JavaScript Event Loop on a high level.

while JavaScript is commonly thought of as an interpreted language, it is actually a Just-In-Time compiled language. Modern JavaScript engines use a JIT comp...

Learn how to make a cool looking dark mode toggle in React!

The app directory, Streaming, Suspense, and hybrid Server and Client Components were demystified — with a little help from GraphQL + WunderGraph.

This short article will cover Rest parameters and how to use them in JavaScript programming.

Building a facial recognition application with JavaScript is not a daunting task. In this blog post, I'll walk you through the journey of developing one.

The article offers a concise guide on exporting dashboard charts to PDFs using jsPDF, demonstrating the process with clear examples and minimal code.

History of ECMAScript decorators, their implementation, and real-life examples of the decorator pattern in action.

In this complete guide, let's look at how && works, and go through some examples to explain when it returns values, and what values it will return.

The best Slack bot tutorial for Node.js on the internet.

Symbol, the brand new primitive type for JavaScript is worth to know more for each single front-end hacker.

"Let's Understand Chrome V8" are serial technology articles that explain the V8 code, it covers many V8 kernel fundamentals such as ignition execution.

I bet you didn’t know that Javascript has pointers. Well, it does! Let’s take a quick look at how they are implemented and how they work.

Here are two simple Async/Await JavaScript scripts that will detect and indicate browser support for the AVIF and WEBP image formats.

We use the splice method to insert an item into an array at a specific index in javascript, which takes 3 arguments - and also lets us delete items too.

v-if and v-show are two ways to conditionally render content in Vue.

Arrays in Javascript are a simple, one-dimensional way to store simple sets of data. Arrays are non-unique, which means they can store duplicates (unlike sets).

If you try to do something real-time with REST APIs, you're going to have a bad time.

Dive into the world of JavaScript functions with our comprehensive guide. Learn the ins and outs of function declarations, expressions, and callbacks.

Java 9 comes with a whole host of new features that help you with your projects. These Java 9 API improvements can help with everything from pictures to process

Convert files' and folders' structures to Bash Scripts with NodeJS.

Understanding Javascript spread operator

If you have understood the discussion so far, you should feel confident in your capacity to discuss closures when asked about them during your next interview.

Immediately invoked function expressions, or IIFE, are functions that are run as soon as you define the function.

Learn why it's recommended to use let and const instead of var in JavaScript.

There is no direct way to break from the forEach() function, however, there are some workarounds.f

Discover advanced console.log tips to enhance your web development debugging skills, from basic tricks to creative uses and logging levels.

2-3x or more performance improvement in data pipelines by using custom JavaScript iterators and optimized algorithms for sets, arrays and cartesian products.

Learn how to implement lazy loading for images and videos in JavaScript using the Intersection Observer API.

Building a web component that renders one picture at a time.

Learn how to add Annotation, redact, and form editor tools to a JavaScript PDF viewer. See more from Document Solutions today.

So you have a Javascript array, and you want to get the last element. Follow these steps.

If your Javascript appears before your HTML, then trying to do things like attach events to your HTML is not possible.

Understand how JavaScript array methods work by implementing three of the most common methods: map(), filter() and reduce.

Unit tests are a challenging topic, with many interconnected aspects that make it difficult for beginners.

Learn how to sort an array of objects in JavaScript using the sort() method, custom compare functions, and practical examples for strings and numbers.

Even after 8 years in front-end development, I sometimes mix up these methods.

JavaScript (JS) is a programming language used to make websites dynamic. It is good to remind yourself of the basics sometimes.

JavaScript offers three distinct ways to declare variables: var, let, and `const. Each serves a unique purpose, and understanding their differences is key.

Finding and building community theme is pervasive in the JavaScript community as there are frameworks. You can build community while app building.

In short, the Javascript sort() method is an incredibly useful way to organize an array, whether you’re sorting numbers, strings, or objects.

I hope this ode has inspired you to give innerHTML another look and fall in love with its simplicity and convenience all over again.

Learn how to improve the performance of your JavaScript unit tests with this comprehensive guide.

Learn how to optimize your angular application by using Web Workers. See more from MESCIUS today.

Learn how to remove duplicate objects from a JavaScript array using different methods such as Set(), Map(), and Loadsh.

Using the Teleport function in Vue JS to move Ben Franklin around the screen.

Frequent alerts can lead to notification fatigue, causing users to disengage. Building an efficient batching system can overcome this problem.

You may think "Surely there's a library for that!", and yet, there isn't.

How to build the beloved Python range() in JavaScript by using Iterators.

In JavaScript, a variable is a named reference to a memory location that can hold different types of data, such as numbers, strings, booleans, objects, or fu...

Knowing how to use forEach in JavaScript is an important first step in writing code that is optimized for speed and efficiency.

Learn how to handle files with JavaScript and how libraries like Filestack can simplify the process.

Regular expressions can be a bit tricky to master, but they can be incredibly useful for working with text in JavaScript.

Learn how to create your own Slackbot, 'reacting-bot', that automatically reacts with a heavy plus sign emoji to every message sent by a specific user.

7/1/2024: Top 5 stories on the HackerNoon homepage!

Learn advanced error handling in JavaScript with try-catch, throwing, async patterns, and real-world examples for robust applications

An introduction to recursion in JavaScript with examples!

Learn how to efficiently declare, access, and manipulate JavaScript arrays with this comprehensive guide, covering essential methods and best practices.

Get the answers to the most common questions about JavaScript objects, packed with examples and challenges to help you learn hands-on.