So you want to learn React.js? – EdgeCoders

So you want to learn React.js?

☞ 

#Redux #javascript

  • This is a good thing, React is a library that does one thing really well, but it’s not the answer to everything.
  • This is not counting the tools and other libraries that complete React like for example, Redux or Relay.
  • Refreshing your knowledge on JavaScript first would not hurt, specially because you need to learn ES2015, not because React depends on it (it does not), but because it’s a much better language, and most of the examples, courses, and tutorials you’ll find use the modern JavaScript syntax.
  • The recommended tool is Babel.jsReact ecosystem libraries: Since React is just the UI language, you’ll need tools to complete the picture and go beyond even MVC.
  • I’ll give you two things to focus on, just forget everything else you encounter and learn these two first once you’re done with React itself: react-router and redux.Right after getting comfortable with the raw concepts of React itself, build a React Native app.

First, make peace with the fact that you need to learn more than just React to work with React. This is a good thing, React is a library that does one thing really well, but it’s not the answer to…
Continue reading “So you want to learn React.js? – EdgeCoders”

A simple React.js on MacOS Setup

  • The node package manager is used to install libraries/frameworks (node packages), such as React, on the command line to your project.
  • That’s why my recommendation would be Visual Studio Code to start developing React applications on MacOS.
  • The installation on a MacOS machine is simple: Navigate to the official Visual Studio Code website and download the recent version of VS Code.
  • That’s your integrated command line in Visual Studio Code to install node packages with NPM or to start/test your project.
  • On the command line (in Visual Studio Code), type the following command to install create-react-app: – – This package allows you to bootstrap React applications with zero-configuration.

A concise step by step guide on how to setup React.js on MacOS. In a few steps, you will install Visual Studio Code, Node.js, NPM, Git, Prettier and create-react-app for building React applications with Mac OS …
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Making of a component library for React – Hacker Noon

Making of a component library for React  #reactjs

  • For this library, this is what I had at the end: – assets/ — Skip this folder, this is just for images I had in API docsbuild/ — UMD and ES module build files + sourcemaps.examples/ — This folder contains test .
  • PopupMenu header partAs we build components for UI we include style files, rollup allows us to make bundles with styles and images the same way as webpack does.
  • import React, {Component} from ‘react’;In my case I even need to use React to provide context to child components this old way: (old because recently React introduced new Context API).
  • I have PopupTable that takes popupWidth of the parent PopupMenu – React context in PopupMenu classI would like to also highlight classnames npm module that does pretty good job in combining multiple classes from CSS modules: – classnames module exampleUsage: – Unit testingFirst you need to decide which unit-testing framework you…
  • Example: – // Jest Snapshot v1, should render correctly 1`] = ` – div – div – onMouseOut={[Function]} – onMouseOver={[Function]} – / – div – onMouseOut={[Function]} – onMouseOver={[Function]} – style={ – Object { – “height”: “auto”, – “left”: “calc(-100px + 50%)”, – “visibility”: “hidden”, – “width”: “calc(200px – 10px)”, -…

Some time ago I decided to make an article that covers topics like publishing to NPM, API architecture. Best tutorial for this would be a react component library development. A good example of React…
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React Router 4: A Practical Introduction

React Router 4: A Practical Introduction  #reactjs

  • In previous versions of React Router such as v3, route protection code looks like this: – – The component had a prop that accepts a method that allows entry or refusal to a URL location based on a user’s authentication status.
  • In this example, the Auth Service will simply be an object like so: – – Now, let’s build the like so: – – The code above simply illustrates that if the authentication status of the user is true, then a component would be rendered else the user would be redirected…
  • is a higher order component from React Router that allows re-rendering of its component every time the route changes with the same props.
  • Add code to your like so: – – In the code above, we imported a new component, from React Router.
  • Now, all we need to do is map over the routes array as shown in the code below: – – In the code above, whenever the route’s path matches the URL location, the leftbar component will be rendered.

React Router 4 uses declarative approach to routing. In this tutorial, you’ll learn how to use React Router 4 in your web projects via practical examples.
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Beyond React 16: Time Slicing and Suspense API

  • The latest release of ReactJS which is React 16 ships with a lot of features such as , , , and many others.
  • A sneak peek into new features coming to React was demoed by the creator of Redux and React core team member, Dan Abramov at JSConf Iceland, 2018.
  • Making it easier for developers to build great user experiences using ReactJS has always been the goal of the ReactJS team.
  • Time-slicing allows ReactJS, which now runs on React Fiber, to split computations of updates on children components into chunks during idle callbacks and rendering work is spread out over multiple frames.
  • Besides the steps shown in this section, the guide also shows: – – I’m overwhelmed by the engagement of React core team members with members of the JavaScript community in landing new features in React.

Time Slicing, Suspense and the Fetcher API are new features and concepts that will land soonest in stable releases of ReactJS. Learn how they work.
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Essential React Libraries in 2018

  • But in the end, when implementing a larger application, you need a couple of more libraries to have a sophisticated web application with React as its core.
  • The following article will give you an opinionated approach to select from these libraries to build a sophisticated React application.
  • In plain JavaScript, it would be possible to create a React class attribute with conditionals: – – But it is so much easier with the classnames library: – – It works perfectly with CSS modules too.
  • The library is for many people almost mandatory in applications when it comes to conditional stylings in React.
  • Basically a fetch looks like the following, for instance in a React lifecycle method when a component mounts: – – Basically you wouldn’t have to add any other library to do the job.

Often it is difficult to find all the relevant libraries to complement your React application, because React’s ecosystem is a flexible yet large framework. The article gives you an opinionated React setup by choosing essential libraries: Redux, MobX, React Router, Flow, Styled Components, Lodash, Ramda, Prettier, Axios, …
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So you want to learn React.js? – EdgeCoders

So you want to learn React.js?

☞ 

#javascript #ReactJS

  • This is a good thing, React is a library that does one thing really well, but it’s not the answer to everything.However, identify whether what you’re currently learning is React or not, mainly so that you don’t get confused about your effort to learn React itself.
  • This is not counting the tools and other libraries that complete React like for example, Redux or Relay.There is an important question about the order with which you need to learn things.
  • I like to be specific about this here, so if you don’t know how to map or reduce an array, or if you don’t understand the concept of closures and callbacks, or if seeing “this” in JavaScript code confuses you, you’re not ready for React and you still have a…
  • Imports and exports of modules (most important of all)You don’t have to start with ES2015, but you do need to eventually learn it (and not because you’re learning React).
  • Don’t start here until you’re very comfortable with React itself.

First, make peace with the fact that you need to learn more than just React to work with React. This is a good thing, React is a library that does one thing really well, but it’s not the answer to…
Continue reading “So you want to learn React.js? – EdgeCoders”

React server-side rendering with Webpack – The Problem Solver

#React Server-Side Rendering with #Webpack  #reactjs #javascript #Programming #coding

  • There are times when the initial blank html page being download for a React application is not perfect.
  • So, if you want to maximize traffic to your React application using SEO Server-side rendering is a must have.
  • With a Server-side rendering style application, the initial HTML page already contains all, or most, of the markup so it can be displayed much faster.
  • There are several approaches to doing Server-side rendering with a React application generated using Create React App (CRA).
  • A much better approach would be to use Webpack to generate two JavaScript bundles, one for use with Server-side Rendering and a second for use in the browser.

There are times when the initial blank html page being download for a React application is not perfect. One reason might be Search Engine Optimization, another might be a slower initial render, especially on mobile devices.
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Fullstack React: React and WebVR using A-Frame

React and WebVR using A-Frame  #ReactJS #WebVR

  • Today we are going to learn how to create a simple augmented reality experience using a library called A-Frame and React.
  • We are going to take what I learned from that and create a relatively simple application that takes an equirectangle image and use it as our back drop for the beginnings of a virtual experience.
  • A-Frame is a web framework used to build virtual reality experiences built on top of technologies like three.js and the WebVR API The Mozilla VR Team developed it as a fully open project.
  • We now need to import A-Frame into our React component and then add our first tag, the scene.
  • Update the render function of your component by adding some entities: – – A-Frame gives you access to a lot of primitive entities out of the box so we can add a sphere by just using the tag.

Editor’s Note: We are excited to have a guest blogger on our blog for this article! Jordan Papeleo is a technologist, programmer, and code mentor who has deep passions about growing developers, his community, his faith, and his mustache.
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