ReactJS a popular Javascript library – Oceanize Geeks – Medium

ReactJS a popular Javascript library  #javascript

  • ReactJS a popular Javascript libraryWhy React?If we think about why we choose ReactJS library over other Javascript framework the first things is come into our mind React is really very fast.
  • When transactions happen to that state, React takes care of updating the User Interfaces based on that.React is just JavaScript, there is a very small API to learn, just a few functions and how to use them.
  • After that, your JavaScript skills are what make you a better React developer.
  • A JavaScript developer can become a productive React developer in a few hours.React can also render on the server using Node and power mobile apps using React Native.Cons of ReactJS:React is evolving so fast some time developer failed to collaborate with the pace of emerging ReactJS.
  • Developers and designers complain about JSX’s complexity and consequent steep learning curve.After considering above pros and cons Although its to early to predict but we can assume that reactJS is creating new trend in Javascript library.

If we think about why we choose ReactJS library over other Javascript framework the first things is come into our mind React is really very fast. Comparing to other javascript framework like…
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Building a Wizard / Workflow in React – Entelo Engineering

Building a Wizard / Workflow in React  #react #reactjs #tutorial #reactjs

  • Here are just a few examples:User Registration with multiple formsBreaking large forms into smaller stepsE-commerce checkout flowMulti-page surveysI’ve had previous experiences building out a checkout flow for e-commerce companies, but this was the first time I had to build a workflow using React.Here is the design and the approach I…
  • Finally, we end the workflow with a confirmation page.Each step of the workflow is a separate route we will define in our routes file when using react-router.
  • As we navigate from one step to the next, we will advance the progress bar along with rendering a new container with the next step’s contents.Choosing a Progress BarFor the progress bar, we decided to use the libraryThis is a very simple progress bar and the API is straightforward.
  • Below are some examples of what the progress bar looks like as we move from one step to the next.First StepNext Step to show progression in the workflowFinal StepReact RouterSet up the route to determine what step of the flow we are in.Route path=”jobs/:id/:step” /The id and step will be passed…
  • In the component, we will create a switch case statement to determine what component to render.switch (step) { case (‘description’): return (DescriptionContainer /); case (‘criteria’): return (CriteriaContainer /); …}We also use this stepvalue to calculate the progress bar distance and what progress label should be bold.ContainersWe have a series of…

One of my first tasks at Entelo was to work on a greenfield project that involved a step-by-step wizard. Workflows/wizards are useful when you want the end-user to complete a series of steps. (I’ll…
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A New Way to Handle Events in React

  • In the Facebook docs, you’ll see event handling done like this:

    ES6 classes won’t automatically give scope to , and since you’ll usually want to call or perhaps invoke another method in the component, the “official” convention is to bind all the event handlers all the time in constructor.

  • React Docs

    There’s a much cleaner way to write event handlers that 1) avoids boilerplate and 2) doesn’t cause extra re-renders: property initializer syntax!

  • There’s an ESLint rule that will tell you not to use “bind” or arrow functions in render

    My best guess that Facebook hasn’t “officially” endorsed this pattern in their documentation is because stage-2 ES6 hasn’t been finalized yet, so Property Initializers are still considered non-standards.

  • However, the generator already enables stage-2 so… it’s very likely Property Initializers will become de-facto for defining event handlers in the near future.
  • Once you get comfortable with Property Initializers and begin using them to define handler methods, you’ll gain two notable benefits:

    🌵 Checkout this CodePen to see Property Initializer Syntax in action

Skip boilerplate code and learn how to write more concise event handlers for your React code.
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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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React and React Native [Book]

Adam Boduch's

  • Use React and React Native to build applications for desktop browsers, mobile browsers, and even as native mobile apps

    Who This Book Is For

    This book is written for any JavaScript developer—beginner or expert—who wants to start learning how to put both of Facebook’s UI libraries to work.

  • What You Will Learn

    React and React Native allow you to build cross-platform desktop and mobile applications using Facebook’s innovative UI libraries.

  • The first part shows you how to start crafting composable UIs using React, from rendering with JSX and creating reusable components through to routing and creating isomorphic applications that run on Node.
  • We then move on to showing you how to take the concepts of React and apply them to building Native UIs using React Native.
  • Split into three major sections to help organize your learning, this hands-on, code-first book will help you get up to speed with React and React Native—the UI framework that powers Netflix, Yahoo, and Facebook.

Use React and React Native to build applications for desktop browsers, mobile browsers, and even as native mobile apps About This Book Build React and React Native applications using familiar … – Selection from React and React Native [Book]
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Firekit concepts to sync Firebase and redux – Tarik Huber – Medium

Firekit concepts to sync Firebase and redux  #react #firebase #javascript #redux #reactjs

  • That is one of the main concepts firekit uses to manage the sync of the firebase realtime database and the redux store.
  • Firekit allows you to make your firebase reference with all the native firebase query and filtering functions and just send the resulting reference to firekit and it will listen to all changes and sync them to the redux store.Saving only simple jsonIf using instances of classes in your library you get into the situation to save to the redux store complicated objects and functions.
  • By saving only simple json in your redux store persistence can be done however you want and with every tool and concept you wish.Persistent listenersThe main reason I choose to create firekit is that all other libraries link the whole listening cycle to a single component.
  • You can leave the listening cycle in a component, page, application or any other level you want.This approach is the same no matter if you are listening to lists or simple paths in the firebase realtime database.ConclusionFirebase is made to make our developer lives easier.
  • The main goals are to give the user maximal flexibility for using firebase and just providing easy and simple tools to sync data to the redux store.I you are interested on how the library works or want to try a real world project visit the github repo with the source code or the demo page.If you like how this library works you could put a star on the github repo đ

Firekit is a library that helps you sync your Firebase realtime database with the redux store of your react application. It uses some new approaches witch we will try to present in this article. If…
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Scaling your Redux App with ducks – freeCodeCamp

Scaling your Redux App with ducks:  by @alexnmoldovan #ReactJS #Redux #JavaScript

  • A single flow through your app will probably require files from all folders.
  • Selector functions take a slice of the application state and return some data based on that.
  • The file specifies what gets exported from the duck folder.
  • You end up with a folder common or shared, because you want to reuse code across many features in your app.
  • The solution was to split each feature into a duck folder.

How does your front-end application scale? How do you make sure that the code you’re writing is maintainable 6 months from now? Redux took the world of front-end development by storm in 2015 and…
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