Using Electrode to Improve React Server Side Render Performance By Up To 70%

  • js application platform that powers walmart.com with several goals in mind, including ease of use, re-usability of components across applications and, most importantly, performance.We use server side rendering for almost all of our applications for two reasons:Improved performance for the customerBetter for SEOIn our tests, however, we found that React’s renderToString() takes quite a while to execute — and since renderToString() is synchronous, the server is blocked while it runs.
  • Every server side render executes renderToString() to build the HTML that the application server will be sending to the browser.To solve this problem, we created two Electrode modules: Above the Fold Render (ATF) and Server Side Render Profiling and Caching (SSR Caching).
  • The average renderToString()call with this configuration took 153.80 ms.Electrode default, though, Electrode comes with renderWithIds:false, which gives us a renderToString() time of 124.80 ms. Not bad — Electrode’s default configuration has already improved render time by 19%!
  • That drops our renderToString() time all the way to 36.56 ms — an astounding 71% improvement from the default Electrode configuration, and a 76% improvement from our original, unoptimized test.
  • That means a 70% improvement won’t mean 90 ms, but 180 ms saved.Special Thanks:To Arunesh Joshi, Dmitry Yesin, and the home page team who have implemented the Electrode modules and are using them on the home page in production.To Caoyang Shi, for helping to gather data and ensuring we’re getting the right numbers!More Information:Check out Joel Chen’s post on ReactJS SSR Profiling and Caching or Arpan Nanavati’s post on Building React.js at Enterprise Scale.Check out my post about the release of Electrode, the customer-facing platform that powers Walmart.com.The Electrode website: www.electrode.io

We built Electrode, the react/node.js application platform that powers walmart.com with several goals in mind, including ease of use, re-usability of components across applications and, most…
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Jest and the Component Driven Development (CDD) – Comunidad JS – Medium

#Jest and the Component Driven Development (CDD):  #ReactJS #JavaScript

  • Jest and the Component Driven Development (CDD)Testing React and React Native applications.We all knows about TDD right ?
  • I recently discovered other flow/flavor around React Components and Jest snapshot testing that makes me more happy and encourage me to write more tests.This approach makes the dev process a bit more fun that the other way around.
  • Then, when you´re confortable with your component code base and you have applied all the good practices out there, write the actual test, passing the required props to the component being tested and expect it to match the snapshot.Snapshot testingSnapshot tests are a very useful tool whenever you want to make sure your UI does not change unexpectedly.The above statement, is from the Jest documentation, and it´s 100% true.
  • I’ve found snapshot testing to be a quick and fun way to test Components and make sure your UI does not change unexpectedly, which is a good thing.The test will fail if the two images do not match: either the change is unexpected, or the screenshot needs to be updated to the new version of the UI component.That means we are not passing the expected props to our component in some parts of our application or we have adjusted the component (because we´ve refactored it).
  • So either one or the other possibility, we need to update the test snapshot (If we´ve refactored it) executing in the terminal yarn test -u or go and fix the part in the application where we´re not using the component as we expect.Having a test coverage between 80 and 100% make us more confidents when we need to deploy to any environment and allows applications to be more robust and easy to scale.In closing, I really encourage React developers to use Jest for testing applications.

We all knows about TDD right ? Test Driven Development.
The philosophy behind it, is to start the development cycle with first writing a failing test and then writing the actual function, to make it…
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7 Best Javascript Frameworks To Learn In 2017

  • Node.js is an open-source & cross-platform for best JavaScript frameworks which uses run-time environment for executing JavaScript code on server-side.
  • Angular JS 2 is the most popular as well as best JavaScript frameworks used by many developers to build and maintain complex web applications.
  • A JavaScript framework contains different functionalities which support other parts of the application in a form of services & also improves the existing modules into ES6 modules.
  • Vue collaborates with WEEX, which is a cross-platform UI framework which uses Vue as its best JavaScript frameworks runtime which helps to use same Vue component syntax as well as other components that cannot be rendered in the Browser & also natively on iOS and Android.
  • Ember is a best JavaScript frameworks with front-end design to build websites with rich and complex applications.

7 Best Javascript frameworks 2017: JavaScript is a scripting language used in web development to add dynamic and interactive elements to the websites.
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You.i TV demonstrates the ability to take React Native to new platforms leveraging the power of You.i Engine

You.i TV goes all in with @reactnative

  • July 28th, 2017 — Ottawa, Ontario — You.i TV, a global leader in video experience platforms, today announced support for React Native as a development framework on top of You.i Engine.
  • With growing demand for a consistent development strategy to bridge mobile and 10-foot platforms, developers now have more flexibility in how they build You.i Engine video applications.
  • By extending the React Native platform support to include You.i Engine, the same developer experience can be applied across mobile, streaming pucks, gaming consoles and smart TVs.
  • At You.i TV our founding principles are to enable the seamless delivery of beautiful user experiences, consistently to every screen,

    You.i TV is a privately held company whose You.i Engine software platform enables TV and media companies worldwide to create fans, engage users, and convert customers.

  • You.i Engine allows brand owners to build personalized, profitable experiences quickly on all platforms – mobile devices, set-top boxes, game consoles, and streaming devices – from a single code base.

You.i TV, a global leader in video experience platforms, today announced support for React Native as a development framework on top of You.i Engine.
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Master React JS and Redux- Build 4 Projects – Neil Thomas – Medium

  • Master React JS and Redux- Build 4 ProjectsView Full DetailsLearn to create the React JS Redux apps you always wanted, build 4 projects, discover development tricks, and master React!Become a highly-demanded software engineer by following this course by David Katz on React JS and Redux.
  • As one of the most highly-paid skills for web developers, learning React will open doors and jobs for you.This project-based course will have you coding right away.
  • Building four carefully thought-out example applications in this course will sharpen your skills in modern web development.First, learn the principles of React JS by building two applications.
  • Some JavaScript experience will help, but this course makes sure to explain every new concept thoroughly.You will learn from this course:Develop entire React JS and Redux applications from scratch.Build applications that deal with APIs and web requests.Discuss ES6 and advanced JavaScript.Create web apps with full authentication, and real-time database.This course is best for :The perfect student knows some JavaScript, HTML, and CSS, but hopes to learn a new web development framework to significantly boost their skills.All levels welcome.
  • However this won’t introduce coding from the ground up, so this might feel fast-paced for completely new students.Experienced developers and engineers will find this course perfect for brushing up on web development.More details about this course- View here

Learn to create the React JS & Redux apps you always wanted, build 4 projects, discover development tricks, and master React! Become a highly-demanded software engineer by following this course by…
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7 Best Javascript Frameworks To Learn In 2017- Starhead Technologies

  • Node.js is an open-source & cross-platform for best JavaScript frameworks which uses run-time environment for executing JavaScript code on server-side.
  • Angular JS 2 is the most popular as well as best JavaScript frameworks used by many developers to build and maintain complex web applications.
  • A JavaScript framework contains different functionalities which support other parts of the application in a form of services & also improves the existing modules into ES6 modules.
  • Vue collaborates with WEEX, which is a cross-platform UI framework which uses Vue as its best JavaScript frameworks runtime which helps to use same Vue component syntax as well as other components that cannot be rendered in the Browser & also natively on iOS and Android.
  • Ember is a best JavaScript frameworks with front-end design to build websites with rich and complex applications.

7 Best Javascript frameworks 2017: JavaScript is a scripting language used in web development to add dynamic and interactive elements to the websites.
Continue reading “7 Best Javascript Frameworks To Learn In 2017- Starhead Technologies”

Share Code between React and React Native Apps – Hacker Noon

  • Share Code between React and React Native AppsDevelopers are adopting Higher Order Components (HOC) Stateless Functional Components, and for good reason: they make it easier to achieve code reuse, a coveted aspiration of developers.There are many articles on HOC and Functional Stateless Components.
  • But here are a few benefits to consider:UX consistency, both within an application and across devicesMake cross-cutting upgrades: improve a component and update all its uses easilyreuse routing and authorization rulesSwitch libraries (for example, the apps below uses MobX for state management, but Redux could be swapped in)I’ll focus on using HOC and Functional Stateless Components to achieve reuse.
  • It will not use routes nor multiple scenes as the focus is on component reuse.We will add a second pair of applications (React and React Native), which will reuse the components we extract.This GitHub repo branch has the baseline applications (The final result is here.)
  • You have to “see” the duplication, which might require rearranging code blocks.Applying these ideas is like moving puzzle pieces around, to find where they meet and what patterns they reveal.Let’s start by looking for duplication.Seeing DuplicationThe web and mobile applications have two main components.In the web application, App.jsIn the mobile application, SearchView.jsThe following outlines their structure.Almost the same, but the platform differences between React and React Native are in the way.The two components have similar structures.
  • But they are in the README for the GitHub repo branch.Instead, I’ll focus on the refactoring to a common SearchBox, which our web (React) and mobile (React Native) applications will both use.Extracting a Shared Component for Web and MobileFor clarity, I’ve renamed SearchInput.js, SearchResults.js and SearchBox.js to WebSearchInput.js, WebSearchResults.js and WebSearchBox.js, respectively.Let’s look at (Web)SearchBox.jsLines 2–10, 19, 20, 26, 27 are specific to React.MuiThemeProvider, a container for Material UI components, is the only direct dependency on Material UI.

Developers are adopting Higher Order Components (HOC) Stateless Functional Components, and for good reason: they make it easier to achieve code reuse, a coveted aspiration of developers. There are…
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