Good Developers are Smart, not Clever.

One of my first lessons as a developer 15 years ago was a simple, short message. “Expressive” means clear-cut, definitive and specific. So writing an expressive code will necessarily have to address a specific problem.

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Build the Next Generation of Forms With React Hooks Forms

Why Not Other React Library Forms?It’s really simple, there are multiple good reasons:Performance is important and package size matters. This is a tiny library without any dependencies.Reduces the code to handle forms, with less complexity due to the Hooks.

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Understanding Angular Ivy: Incremental DOM and Virtual DOM

Here at Nrwl, we’ve been sharing a lot of insights about Angular Ivy, as there is anticipation about what it will enable us and our clients to do. Angular Ivy is a new Angular renderer, which is radically different from anything we have seen in mainstream frameworks, because it uses incremental DOM.

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Adventuring Into React Hooks Performance Practices

From version 16.8.0, React introduced us to a way to use state and other React features without writing a class — React Hooks. It’s an amazing improvement around the classic Class paradigm which allows us to reuse stateful logic between components.

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FastSpark: A New Fast Native Implementation of Spark from Scratch

TLDR: Here is the code to explore. It all started during my hobby research on various distributed schedulers and distributed computing frameworks. Naturally, Spark came under the bracket. I was already somewhat familiar with Spark internals since I have been using it for over 3 years.

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Why I've stopped exporting defaults from my JavaScript modules

In 2019, one of the things I’m going to do is stop exporting things as default from my CommonJS/ES6 modules. Importing a default export has grown to feel like a guessing game where I have a 50/50 chance of being wrong each time. Is it a class? Is it a function?

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Testing React List Using axios and React Testing Library

A typical web app will surely have a list to be rendered. It can be a list of laptops, cars, movies, property, users, etc. Today, we’re going to look at how we can test an async list. Which simply calls an API, fetches the data, and renders the user’s first name to the page.

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How Atomic Goes About Setting a Project Budget

If you’ve worked with other custom software companies, you’ll notice that Atomic’s approach to budgeting is unique. It’s a lot more time-intensive and comprehensive. So why do we invest our time creating an extensive budget model? A few reasons:

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The problems of shared mutable state and how to avoid them

This blog post answers the following questions: What is shared mutable state? Why is it problematic? How can its problems be avoided? Sections marked with “(advanced)” go deeper and can be skipped if you want to read this blog post more quickly.

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How I Make Sense of RxJS

RxJS is short for reactive extensions library as implemented in JavaScript. It's built into Angular, and available on its own as well. What it really is is an implementation of a pattern called reactive programming. And as a result, there are extensions libraries in multiple different languages.

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Google says it's achieved quantum supremacy

Google is standing by its claim that it's achieved quantum supremacy -- marking a major milestone in computing research. The company first made the claim back in September, and while disputed by competitors, Google's research paper has now been published in the scientific journal Nature.

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Local Jenkins With Docker

CI/CD pipelines allow us to automatically build, test and deploy code changes. With Jenkins pipeline, the pipeline itself is generated from a file called the Jenkinsfile which, usually, is source controlled together with the source code repository.

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Simple Code Reuse with React Hooks

Code reuse is very necessary for scaling. We’ll be looking at what React hooks are and how we can use them to keep our components D.R.Y. Hooks are a new feature proposal that lets you use state and other React features without writing a class. They’re currently in React v16.7.

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Working With ECMAScript 2019 Asynchronous Iteration Using “for-of”

This article is focused on the concept of Asynchronous Iteration, which is available in ECMAScript 2019. The“for-of” loop is often used to iterate through the list of items inside a loop. We can now use the “for-of” loop in JavaScript to iterate through the list of Promises and provide the value received when the Promise is resolved.

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Migrating a 50K SLOC Flow + React Native app to TypeScript

“Well, it depends” is the prototypical response when asking a software engineer for advice, no matter how straight-forward the problem may seem. When asked “Should we choose TypeScript or Flow for our next React Native project?” however, the answer only depends on one variable: whether or not you work at Facebook.

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Building a Cool Horizontal Scroll Interaction in React

In this tutorial, we’ll create a fun scroll animation in which items “flip” in the direction of the scroll. We’re going to use react-spring for animating and react-use-gesture to tie animation to the scroll events.

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How to Make Your Conditional Statements Easier to Read in JavaScript

One of the most powerful tools that all programming languages provide is the ability conditionally run code, creating branches of code that runs only when certain conditions are met. In JavaScript, as in many other languages, this is called conditionals.

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The $10m engineering problem

When evaluating the value of any business, one of the most important factors is the cost of goods sold (or COGS). For every dollar that a business makes, how many dollars does it cost to deliver? For a traditional business, there are many ways to minimize COGS.

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Design systems workflow in Storybook

Last week over 15,000 people checked out Design Systems for Developers, a free guide I cowrote about the frontend infrastructure underpinning design systems. The guide’s surprising popularity is indicative of just how mainstream design systems have become amongst developers.

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10 Interesting JavaScript and CSS Libraries for October 2019

Our mission at Tutorialzine is to keep you up to date with the latest and coolest trends in web development. That’s why every month we release a handpicked collection of some of the best resources that we’ve stumbled upon and deemed worthy of your attention.

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About React Suspense and Concurrent Mode

The next big things on the React roadmap are Concurrent Mode and Suspense. They are related and complement each other, so people sometimes mix them up. But they represent very different concepts. To understand Concurrent Mode think about priorities.

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Test Driven Development (TDD) with React, React Testing Library, and Jest

Test Driven Development (TDD) is a reversal in traditional thinking and coding processes. Rather than writing code, and then writing tests to verify that code, the process is reversed. Tests are written first and then the code.

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Vanilla JavaScript and HTML - No frameworks. No libraries. No problem.

Are you using Vue, React, Angular, or Svelte to create web apps? I am, and if you are too, I bet it's been a while since you've written an app that renders content without these fine tools. Armed with only what comes with the browser. Years ago this is exactly how many of us wrote web apps.

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Compiling TypeScript via webpack and babel-loader

ts-loader has one downside: We can’t pipe the output of another loader into it; it always reads the original file. As a work-around, we can use babel-loader to compile TypeScript. This blog post explains how.

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Build your own web analytics dashboard with Node.js

If you have ever used Google Analytics, you know it isn’t the prettiest interface to use. It gets the job done, sure, but I’m not a huge fan of how it looks, nor the color palette. I mean, look at this: It’s just so boring and bland — I need more color in my life than this.

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The Guide to Learning React Hooks (Examples & Tutorials)

React Hooks were initially released in minor (alpha) release (16.7.0-alpha.0) in late October 2018, as the React Team took to the stage at React Conf presenting a talk called “React Today and Tomorrow,” where Dan Abramov showed a slide announcing the proposal of Hooks.

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JavaScript Naming Conventions: Dash

A dash in a JavaScript variable isn't common sense as well. It just makes things more difficult; like using them in an object: It's even not possible to use a dash directly for a variable declaration: That's why it's better to avoid them.

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How To Do the Basics in React Testing Library

A few months ago I was hired to be the tester of a React website. The problem? I had little experience with React, and to follow the test documentation from React, from Enzyme and React Testing…

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Want To Raise Your Confidence? Learn to Walk Away

The most important lesson I’ve learned about creativity didn’t come from something I read, but rather something I saw. Just like that, the clock made a ding and he stopped working. I was so surprised by his action I nearly woke up my newborn son to ask him if he’d seen it also.

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Why version history is not version control

We launched Abstract with a lofty mission to redesign the design process. We started by supporting Sketch, one of the fastest growing and most widely used product design tools on the market. Now, with our Adobe XD integration on the horizon, we’re stepping onto a new stage as a company.

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Why You’re Attached to Being an Inferior Version of Yourself

Despite the mantras, most of us don’t live life as our best possible selves, and it’s not because we lack capability or willpower. We know we’re ready for the promotion, but we don’t ask to be considered.

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Refactoring a Complex React Component

React.js has become the most popular view library for web components, evolving across multiple features that today make it a complete tool to create amazing web applications.

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Interview with a Pornhub Web Developer

Regardless of your stance on pornography, it would be impossible to deny the massive impact the adult website industry has had on pushing the web forward.

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What Is “Mixed Content,” and Why Is Chrome Blocking It?

Google Chrome already blocks some types of “mixed content” on the web. Now, Google announced it’s getting even more serious: Starting in early 2020, Chrome will block all mixed content by default, breaking some existing web pages. Here’s what that means.

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Increase your React + Redux Application Performance With the Reselect Library

Selectors are a handy way to “select” state from the redux store. The Redux store holds all our application logic and data; selectors are used to pick certain pieces of state out of the store. If you’re building your applications using React and Redux, you might benefit from selectors.

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MEAN Stack (Angular 8) Tutorial: Build a Simple Blog CMS

In this MEAN Stack (Angular 8) tutorial, we will build a simple blog CMS that can add, edit, delete and view blog post and category. So, there are two entities or models that required for this simple blog CMS. There only authenticated users that can access this CMS.

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Avoiding useEffect race conditions with a custom hook

If you have been using React hooks, specifically useEffect then you may have come across the same problem that I did when making asynchronous calls such as data fetching. I first encountered this when finding a warning in my console:

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5 Steps to Overcoming Deployment Anxiety with Error Monitoring

We've all been there: experiencing the primal fear and anxiety surrounding a deployment — whether new code or just updates — and sending it out into the world for our users to, hopefully, enjoy. The nature of the beast that is software development shines a glaring light on imperfection.

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3 small tips for better Redux performance in a React app

In my previous article I went through some core concepts of performance optimisation in React apps. This article will extend these concepts by focusing on practices which will make sure that the…

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