Your Choice JavaScript News

App component, React, Render tree & more… React News Friday, February 23

React News TLDR / Table of Contents

  • Building Your First React.js App – Learning New Stuff –
    • This article will take you through every step of building the simplest React app possible. Even simpler than a to-do list. Why so simple? Because I’ve found that when I’m trying to learn a new…
    • App component, React, components, Hobbies component,
  • Quick Redux tips for connecting your React components
    • The connect method is a tricky sum bitch — although it has a very simple API there’s a lot of magic happening under the hood. It’s very easy, especially when first learning Redux, to just start connec
    • render tree, tricky sum bitch—, , ,
  • More Details On Our React.js Workshop With Ken Wheeler, Emma Brillhart and Brandon Dail
    • In case you missed it, Emma Brillhart will be joining Ken Wheeler and Brandon Dail at the two day react.js Workshop. Here’s what you to know about them: Ken is the Director of Open Source at…
    • Emma Brillhart, open source, healthy Twitter presence, frequent conference speaker, popular open source
  • Design Spin Builds a React Website with Cosmic JS –
    • Design Spin is a boutique independent design and development shop in Norwich, England. Principal Jason Foster focuses on creating premium interactive experiences for clients through web and mobile…
    • Cosmic JS, Cosmic JS API, Jason Foster, api-first cloud-based content, cloud-based content management
  • Tools I wish I had known about when I started coding
    • In the tech world, there are thousands of tools that people will tell you to use. How are you supposed to know where to start? As somebody who started coding relatively recently, this downpour of…
    • Visual Studio Code, VS Code extensions, Useful code snippets, Redux Dev Tools, development cycle
  • The Future of State in React
    • light non-local state, famed Render Prop, simple theme-switching component, ,
  • How to Apply UI Test Automation in React Native Apps?
    • Our Test Engineer Adam points out the challenges of working with React Native, along with some tips on how to solve them. Plus a short guide to Detox.
    • React Native Apps, UI Test Automation, ,
  • But I dont want this tutorial to be about anything else than coding in React, so well keep it simple.Lets write our first component: – As you can see on the first line, we create a component be calling the createClass method on the React object.
  • Well need to modify the App component in order to actually turn Profile and Hobbies into Apps children.
  • This is better explained in this article.Below, youll see how you pass the data into the App component, by simply changing a little bit on the ReactDOM.render method.
  • However, the App component is simply a wrapper around the Profile and Hobbies components, so were going to send the data further down the hierarchy, using the same technique as described above.
  • This is how we pass the data from App to its children: – Were passing down the profileImage and name to the Profile component, while only the hobbyList array down to the Hobbies component.

Tags: App component, React, components, Hobbies component,

  • Quick Redux tips for connecting your React componentsIf youre using Redux in your React app youre likely using react-redux to connect your components to your state.
  • In this example the Page component is connected at the top of the render tree.
  • You change the profile image the ENTIRE Page rendersYou remove a feed from the list the ENTIRE Page rendersYou add an image the ENTIRE Page rendersInstead of connecting to the Page component lets connect Profile, Feed, and Images directly to their slice of state.
  • Heres an updated version of the same diagram to demonstrate: – Why is thisbetter?Changing the profile image only Profile rendersRemoving a feed from the list only Feed rendersAdding an image only Images rendersLess renders === Remember when you connect your component you are telling React to render the component anytime…
  • By having each component do its own connect we avoid the unnecessary renders that were happening when we connected at the top of the render tree.

Tags: render tree, tricky sum bitch—, , ,

  • In case you missed it, Emma Brillhart will be joining Ken Wheeler and Brandon Dail at the two day react.js Workshop.
  • Heres what you to know about them: – Ken is the Director of Open Source at Formidable, the author of several popular open source libraries, and a frequent conference speaker often focusing on alternative uses of React.
  • Emma Brillhart is a Software Engineer at Formidable, where shes worked on projects with Starbucks and Viacom, as well as on OSS projects, like Victory.
  • The topics covered by the workshop will be: – Project ArchitectureComponent DesignPatterns for PropssetState Master ClassUsing Context ResponsiblyHoCsRoutingRedux PatternsFormsSSRPerf OptimizationScalable CSS-in-JSTestingRender PropsStatic Typing with FlowUniversal ComponentsError BoundariesPortalsUtilizing Developer ToolsYou can get your ticket here, there are also a few Round 2 conference tickets left so make sure to get yours…
  • To get the latest news, make sure to follow us on Twitter or Facebook.

Tags: Emma Brillhart, open source, healthy Twitter presence, frequent conference speaker, popular open source

  • If this was a WordPress website the language we would be using on the server side would be PHP, but we would still be using JavaScript on the client side for any browser trickery such as the image sliders mentioned.
  • When you visit this website, the first page is delivered from the server then further page changes are handled client side.
  • Lighthouse is available within the Google Chrome browsers development tools, allowing you to quickly audit any of your web pages for Progressive Web Apps, Performance, Best Practices and Accessibility.
  • I hope in the future that this new website will convince clients to avoid WordPress and use the fantastic Cosmic JS API to build apps and manage content.
  • Carson Gibbons is the Co-Founder CMO of Cosmic JS, an API-first Cloud-based Content Management Platform that decouples content from code, allowing devs to build slick apps and websites in any programming language they want.

Tags: Cosmic JS, Cosmic JS API, Jason Foster, api-first cloud-based content, cloud-based content management

  • I am by no means an expert, but over time I have compiled a list of tools that have proven extremely useful to me.
  • This is an easy way of finding out the fonts that your favorite website is using, so that you can borrow them for your own projects.PesticideUseful for seeing the outlines of your divs and modifying CSS.
  • This gives you a peek under the hood at their color scheme and allows you to see what other assets exist on their page.WappalyzerUseful for seeing the technologies being used on a website.
  • This is useful for getting some neat syntax highlighting and code suggestions so that CSS only makes you want to quit coding a couple of times a day.HTML SnippetsUseful code snippets.
  • This is handy for those all-too-common bugs where you didnt close your brackets or parentheses accurately.ESLintIntegrates ESLint into Visual Studio Code.

Tags: Visual Studio Code, VS Code extensions, Useful code snippets, Redux Dev Tools, development cycle

  • React’s new Context API will be the go-to solution for sharing state simply.
  • In this post, I’ll describe Context by creating a simple theme-switching component: – – Since Context won’t be live until React 16.3, I’ll be using the polyfill.
  • Creating a Context instance is as simple as calling a function with a default value .
  • Context’s has less emphasis on global state than Redux and can be used to as little or as large a scale that you’d want: just like MobX.
  • In the following snippet, I set up a React Component that manages the state that our Provider will pass to those willing to consume it: – – Consumers must be descendants of its context’s Provider for it to access the value it wants.

Tags: light non-local state, famed Render Prop, simple theme-switching component, ,

    Tags: React Native Apps, UI Test Automation, ,

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