JavaScript Async/Await Tutorial – Learn Callbacks, Promises, and Async/Await in JS by Making Ice Cream 🍧🍨🍦
Today we're going to build and run an ice cream shop and learn asynchronous JavaScript at the same time. Along the way, you'll learn how to use: CallbacksPromisesAsync / AwaitHere's what we'll cover in this article:What is Asynchronous JavaScript?Synchronous vs Asynchronous JavaScriptHow Callbacks Work in JavaScriptHow Promises Work in JavaScriptHow Async / Await Works in JavaScriptSo let's dive i
The CSS Handbook: A Handy Guide to CSS for Developers
I wrote this article to help you quickly learn CSS and get familiar with the advanced CSS topics. CSS is often quickly dismissed as an easy thing to learn by developers, or one thing you just pick up when you need to quickly style a page or app. Due to this reason, it’s often learned on-the-fly, or we learn things in isolation right when we have to use them. This can be a huge source of frustratio
ES5 to ESNext — here’s every feature added to JavaScript since 2015
I wrote this article to help you move from pre-ES6 knowledge of JavaScript and get you quickly up to speed with the most recent advancements of the language. JavaScript today is in the privileged position to be the only language that can run natively in the browser, and is highly integrated and optimized for that. The future of JavaScript is going to be brilliant. Keeping up with the changes shoul
How to mock requests for unit testing in Node – freeCodeCamp.org
by Edo Rivai How to mock requests for unit testing in Node“An old Philips cassette player and tape laying on a wooden floor in Italy” by Simone Acquaroli on UnsplashLet’s say you’ve decided to test your codebase, and you’ve read that unit and integration tests shouldn’t perform I/O. You’ve figured you need to mock out the outbound HTTP requests that your app is making, but you’re not sure where to
How to escape async/await hell
async/await freed us from callback hell, but people have started abusing it — leading to the birth of async/await hell. In this article, I will try to explain what async/await hell is, and I’ll also share some tips to escape it. What is async/await hellWhile working with Asynchronous JavaScript, people often write multiple statements one after the other and slap an await before a function call. Th
Five Common Problems in GraphQL Apps (And How to Fix Them)
by Sacha Greif Five Common Problems in GraphQL Apps (And How to Fix Them)Learn to unlock the power of GraphQL without suffering its drawbacksGraphQL is all the rage these days, and for good reason: it’s an elegant approach that solves many of the problems associated with traditional REST APIs. Yet I’d be lying if I told you that GraphQL doesn’t come with its own set of issues. And if you’re not ca
A Look Back at the State of JavaScript in 2017 – freeCodeCamp
by Sacha Greif A Look Back at the State of JavaScript in 2017In advance of the 2017 State of JS survey results, our panel of experts looks back on the past yearOne of the highlights of last year’s State of JavaScript survey results was the great panel of experts we assembled to analyze the results. This year, we took a slightly different approach and decided to let the data speak for itself. But I
Why End-to-End Testing is Important for Your Team
by Phong Huynh Why End-to-End Testing is Important for Your TeamHow our team implemented end to end testing in 4 easy stepsAt Hubba, our business needs are always evolving and the speed of development needs to catch up with it. One of the ways to keep the team moving forward without breaking everything is End-to-end (E2E) testing. Having a full test suite with E2E tests allows us to move quickly.
Scaling your Redux App with ducks
How does your front-end application scale? How do you make sure that the code you’re writing is maintainable 6 months from now? Redux took the world of front-end development by storm in 2015 and established itself as a standard — even beyond the scope of React. At the company where I work, we recently finished refactoring a fairly large React codebase, adding redux instead of reflux. We did it bec
8 Key React Component Decisions – freeCodeCamp
Standardize your React development with these key decisionsReact was open-sourced in 2013. Since then, it has evolved. As you search the web, you’ll stumble across old posts with dated approaches. So, here are eight key decisions your team needs to make when writing React components today. Decision 1: Dev EnvironmentBefore you write your first component, your team needs to agree on a dev environme
Reducing CSS bundle size 70% by cutting the class names and using scope isolation
by Gajus Kuizinas Reducing CSS bundle size 70% by cutting the class names and using scope isolationJust like Google does itAt the beginning of this year I have quit consulting and set out to build GO2CINEMA — Fast, simple and secure way to book cinema tickets in the UK. I have done a splendid job making it fast, simple and secure. Somewhere along the way, I’ve gotten obsessed with the critical ren
Node.js Streams: Everything you need to know
Update: This article is now part of my book “Node.js Beyond The Basics”. Read the updated version of this content and more about Node at jscomplete.com/node-beyond-basics.Node.js streams have a reputation for being hard to work with, and even harder to understand. Well I’ve got good news for you — that’s no longer the case. Over the years, developers created lots of packages out there with the sol
npm cache: the unsung hero
by Siddharth Kshetrapal npm cache: the unsung heroI love npm and believe that this package manager is the single biggest reason for JavaScript’s massive success these past few years. There was a lot of excitement in the JavaScript community when facebook released yarn. And for good reason. Yarn’s install speeds are amazing. Subsequent installs are even faster because yarn caches installed modules
JavaScript Fatigue Fatigue
“The Universe is under no obligation to make sense to you.” — Neil deGrasse TysonYes, JavaScript development is complicated. Yes, it will continue to get more complicated. The web is a complicated place. We are finally getting around to doing all the things we should have been doing all along. As a result, JavaScript tools — and there are a lot of them — are rapidly evolving. If this evolutionary
The Future of Browser History
by Patryk Adaś The Future of Browser HistoryI am really unsatisfied with the current state of Browser History. I think that this is the most underestimated feature of every modern web browser. Let’s take the most popular browser as an example. Before we talk about browsers history, we need to understand how we tend to browse nowadays. Sometimes I want to know how to convert 1 foot to centimeters.
Learn JavaScript Closures with Code Examples
Closures are a fundamental JavaScript concept that every serious programmer should know inside and out. The Internet is packed with great explanations of “what” closures are, but few deep-dive into the “why” side of things. I find that understanding the internals ultimately gives developers a stronger grasp of their tools, so this post will be dedicated to the nuts and bolts of how and why closure
Angular 2 versus React: There Will Be Blood
Angular 2 has reached Beta and appears poised to become the hot new framework of 2016. It’s time for a showdown. Let’s see how it stacks up against 2015’s darling: React. Disclaimer: I enjoyed working in Angular 1 but switched to React in 2015. I’ve published Pluralsight courses on React and Flux and React and Redux in ES6 (free trial). So yes, I’m biased. But I’m attacking both sides. Alright, le
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