JavaScript for Line of Business Applications

Now don’t get me wrong, this doesn’t mean I can turn you into a React master instantly. But at least you’ll understand all the major concepts, if you do decide to jump in.

The five key concepts are:

1. Components
2. JSX
3. Props & State
4. The Component API
5. Component Types

80 million monthly visitors, loads up to 10,000 requests per second, and 15 million items, adding more than one million new items each month is what Walmart.com’s scale is all about. With an e-commerce business that holds the number two online retailer spot in the U.S., we needed not just to scale Walmart.com, but to really leverage the talent and creativity of our engineering base.

From real-world ReactJS usage and scaling our app at Threat Stack, we’ve learned that consistent patterns, data structures, and appropriate tools will help you build your larger system. And we avoided magic because it doesn’t scale!

Security can't be overemphasized when it comes to developing software applications. A single authentication factor system (e.g username and password) is no longer safe enough. If credentials are stolen, a user can be impersonated. Implementing a multi-factor authentication system increases security by requiring the user to provide an additional sets of credentials before they are granted access.

Implementing multi-factor authentication can be time-consuming, challenging, and often difficult to get right. However, in this post I'll show you how to quickly implement multi-factor authentication in your React applications in just a few minutes without breaking a sweat!

MobX is a battle tested library that makes state management simple and scalable by transparently applying functional reactive programming (TFRP). The philosophy behind MobX is very simple:

Anything that can be derived from the application state, should be derived. Automatically.

which includes the UI, data serialization, server communication, etc.

MobX is inspired by reactive programming principles as found in spreadsheets. It is inspired by MVVM frameworks like in MeteorJS tracker, knockout and Vue.js. But MobX brings Transparent Functional Reactive Programming to the next level and provides a stand alone implementation. It implements TFRP in a glitch-free, synchronous, predictable and efficient manner.

Are you interested in migrating your existing jQuery project to React?

Maybe you’re just interested in using a jQuery plugin in your project and there’s no React component that handles your needs.

Using a lot jQuery plugins in your React project is not something that I would encourage, but in these situations wrapping a jQuery plugin with React might be your best option.

This example application created by getstream.io teaches you how to to build an Instagram style application with activity streams and newsfeeds.

Rebass is a React UI component library that uses inline styles to avoid CSS dependencies and prevent leaky global styles from affecting an application. Rebass components inherit styles where appropriate and can be customized using React Context. Rebass components are built as stateless functional components and modeled as presentational components. With unit tests for each component, Rebass is great for prototyping and ready for production.

So you’ve heard the commotion about React, and thought you’d take a look. And you’ve liked what you’ve seen! Or you did, until you saw this: JSX butters my toast OK. You’re happy to give a new technology the benefit of the doubt. But this? Didn’t we escape PHP years ago? And what ever... Continue reading →

There are many different life cycle methods, but in this post we’re going to explore the ones that are used most often (which will cover ~90% of use cases).

You can really break React’s Life Cycle Methods down into two categories.

1. When a component get mounted to the DOM and unmounted.
2. When a component receives new data.

avascript ecosystem is really rich: full of developers but also full of frameworks and libraries.

When you want to develop a frontend application, whatever its rendering framework, you will have to structure things into your project in order to organize the data management with views. This case occurs particularly when you use component rendering frameworks like React or VueJS.

Historically, this has been needed by React so that’s why Facebook has open sourced its tool named Flux.

In this blog I will show you how to pick up an existing codebase example and curtail it into your own, beautiful MobX Example App built using React, MobX and the Cosmic JS API to create and remove…

React’s rendering method enables users to work with a virtual DOM. This type of DOM rendering can cause issues when it comes to accessing the browser DOM and utilizing new props in specific ways. So…

One of the most popular FRP JavaScript framework today is — Cycle.js.

Although, Recycle uses React, its actually inspired with Cycle.js. Recycle initial version had nothing to do with React and was made as an “opinionated version of Cycle.js”.

But, as it turns out, defining components composed of a view, actions and functions responsible for modifying state is a model that can be described without the use of the main function, drivers or complex stream manipulations.

Learn how to improve your React Redux code and ensure its scalability and maintainability in the long run through 3 simple steps.

I’ll share a few insights on how I transformed my Frankenstein into a clean and Redux-compliant codebase, while still being able to deliver new features.

The insights from this article might also be useful for seasoned developers, who want some tips on how to achieve a better-organized and scalable code.

Learn how to style content in React using both old-school CSS and React's inline approach.

For generations, mankind (and probably really smart dolphins) have styled their HTML content using CSS. Things were good. With CSS, you had a good separation between the content and the presentation. The selector syntax gave you a lot of flexibility in choosing which elements to style and which ones to skip. You couldn't even find too many issues to hate the whole cascading thing that CSS is all about.

Well, don't tell React that. While React doesn't actively hate CSS, it has a different view when it comes to styling content. As we've seen so far, one of React's core ideas is to have our app's visual pieces be self-contained and reusable. That is why the HTML elements and the JavaScript that impacts them are in the same bucket we call a component.

Fullstack React is a weekly newsletter about the React ecosystem with an emphasis on useful libraries, tutorials and code. Subscribe to read the best articles each week on React, Flux, GraphQL, Relay, and friends.

I really like Cycle.js. It is simple and declarative. But it has two caveats. First it has hard RxJs dependency and that is too much: if I select a rendering library then I don’t want it to constrain my state handling! Second, Cycle’s DOM event subscription system is not practical (regardless how functional and “reactive” it may be): the emitted data must be encoded into DOM (e.g. by using data attributes like data-id=”myId”). Just ugly.

The state of your whole application is stored in an object tree inside a single store.

That is a direct quote from Redux website. The most of the current Flux libraries use combined reducer and this has locked the developers’ mindsets to the fact that the state should be like a mega sized “blob” which is passed to the “dummy” components via props. And there is always an explicit layer which separates the state handling and the UI: the top level “application container”. Perhaps you’ve seen this kind of lines in Redux apps...

This is a step-by-step tutorial that will help you get up to speed with React quickly, and also build a complete app with the MERN (Mongo-Express-React-Node) stack. You'll also learn other tools that you typically use to build an app: Gulp, Browserify, Material-UI and React-Bootstrap.