Props and Data Flow in ReactJS – Kenlyn Terai – Medium

Props and Data Flow in #ReactJS:  #JavaScript

  • (3) There are only two requirements that define a JavaScript function as a React component:The function accepts a single “props” object argument with dataIt returns a React elementA simple “Functional” componentThe equivalent “Class” componentWhether you declare a component as a function or a class, it must never modify its own props.
  • All React components must act like pure functions with respect to their props.
  • = BoringTo sum up what props are in React, theyAre data passed to components — values can be anything: a string, an array, functions, and so onAre immutableEnable components to become more reusableSo, if props are read-only, what place do they have in creating dynamic web applications?
  • The render() method also calls the diff algorithm which recognizes any changes in the component and logs them for batching to the “real” DOM.Credit: Tarun Sharma: “Understanding virtual DOM react js” from React DocsHere is an example from Components and Props in the React Docs.
  • This code renders “Hello, Sara” on the page:function Welcome(props) { return h1Hello, {}/h1;}const element = Welcome name=”Sara” /;ReactDOM.render( element, it on CodePen.Let’s recap what happens in this example:We call ReactDOM.render() with the Welcome name=”Sara” / element.React calls the Welcome component with {name: ‘Sara’} as the props.Our Welcome component returns a h1Hello, Sara/h1 element as the result.React DOM efficiently updates the DOM to match h1Hello, Sara/h1.

ReactJS comes with a slew of new words and new definitions for existing ones. “Props” is no exception. To understand the meaning of “props” in ReactJS, I turned to the context where it is used — in…
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flight Ultra Simple Animation Compositions for #ReactJS On Github →

Ultra Simple Animation Compositions for #ReactJS
On Github →

  • The best way to build animation compositions for React.
  • Flight tries to be for React what Principle is for Sketch compositions – the fastest, most friction free way to compose and an effortless way to animate an idea, an interaction, or a short movie-like composition in a self-contained widget (a React component after all).
  • Just clone and use the example, built around :

    And now you can frame your compositions in , require and place it in any other React component.

  • For the cool stuff, it walks the component tree, makes decisions about what should move where, and builds a clean and nice declarative data structure that represents the way compositions should behave.
  • To all Contributors – you make this happen, thanks!
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Ultra Simple Animation Compositions for #ReactJS
On Github →”

ReactJs the simple way – Reduce boilerplate code and enjoy React

#reactjs the simple way – Reduce boilerplate code and enjoy React!

  • It contains actions to update the state, stores to hold it and a dispatcher to coordinate the changes, but the truth is that the important statement of flux is the unidirectional data flow: When the state is updated, the application is re-rendered reactively, so it is the state who rules the application.
  • Flux definition, including stores, actions and a dispatcher, usually explains the unidirectional data flow in a more complex way that it should.
  • It’s a data structure that triggers events when it is updated, and it happens to contain all the needed to add the unidirectional data flow to your app.
  • Every time the state is updated, Freezer create a new immutable object for it reusing the unmodified parts of the data tree.
  • Let’s see the code of the todo update reaction:

    You might be thinking that having the input values outside the components will re-render your whole app every time the user types.

ReactJs the simple way – Reduce boilerplate code and enjoy React
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React Native- The Future of Hybrid Mobile Apps development by Alesia Nik

React Native- The Future of Hybrid Mobile Apps development

#mobileapp #appdev #tech #hybrid

  • And now, after the development of React native- the latest framework for hybrid mobile apps development, this is going to be even much better.
  • The Facebook’s React Native is a JavaScript framework for writing real, natively rendering mobile apps for both iOS and Android platforms.
  • Mobile applications development with React Native is beneficial since the developers can push the updates to the users phone without having to go through the app store update cycle, thanks to the extensive use of Javascript.
  • React Native covers renowned UI library of Facebook, ReactJS for web applications and carries DOM abstractions, make the programming for hybrid mobile apps development easier and effective, serving user with higher performance.
  • The Bottom line is that the React Native has taken the hybrid mobile applications development process to the next level.

With the increasing competition in the market, companies are looking forward to address a larger group of users and the best way of this is developing a hybrid mobile app. The hybrid mobile apps are p…
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How to Be A JavaScript Developer – Ken Rogers – Medium

How to Be A JavaScript Developer  #meteor #javascript #webdevelopment #react #reactjs

  • But I’ve always found that the best way to learn web development is to just build things.Meteor is a great way to get started just building things.It’s become a little more complex since its early days, but with the right setup and direction, it can still be a great way to bootstrap reactive applications.I think it’s a fantastic way to get started learning JavaScript development, or branch out into a new framework if you’ve already been using JavaScript for a while.So I wanted to put together this little guide that will serve as a potential path to learning web development with Meteor and React.All of these are resources that I have personally used and have served me well in learning.
  • Learn ES2015This free walkthrough of ES2015 does a great job of introducing you to the basics and walking you through how to use all of the new shiny things.Step 2 — Learn MeteorAlright, now that you’re familiar with JavaScript and its new syntax and capabilities, it’s time to dive in to Meteor.The Meteor TutorialThe official tutorial from Meteor.
  • The Meteor GuideAfter you’ve been introduced to Meteor with the tutorial, dive in to the guide to learn how to structure your project, and to get some more in depth knowledge on the finer points of MeteorStep 3 — Learn ReactSo you’ve got a decent handle on Meteor, not let’s dive into React.The React DocsThe official React docs do a good job of introducing you to the concepts and how to think in a React-ish way.2.
  • It also comes with GitHub source code so you can use it as an example.Phase 2 — BuildStep 1 — Experiment with BaseNow that you’ve got a good grasp on how to develop using Meteor and React, it’s time to start building things.Base is a Meteor boilerplate project to help you bootstrap your Meteor projects.It’s built with React and also uses React Router.In my opinion, downloading Base and digging into it, hacking on it, and using to as the starting point for your own project is one of the best ways to learn development with Meteor.By digging into Base, you’ll get an idea of best practices when building things with Meteor and React, and you’ll be able to use it as a template for building projects.Using the books and courses from the Learn phase as your foundation, you’ll be able to understand how Base is put together and how it all works.Really take the time to dig into every different component and figure out how everything is working.
  • Resist the urge to bounce around from framework to framework, constantly switching to whatever seems coolest.Instead, find problems that need to be solved, figure out a way to solve them with web applications, and then find the proper tool for the job.One of the most important skills for a professional developer is being able to build usable applications that solve real problems for real people.If you can find examples of those out in the wild, and build up a portfolio of yourself solving those with web apps, you’ll be indispensable.So now that you know the basics of JavaScript development with Meteor and React, I want you to get out there and start using that knowledge to solve real problems.Share that knowledge and those solutions with others.

A few years ago, I stumbled on a video of somebody making a responsive, real-time web app using something called Meteor. If you haven’t seen it yet, I recommend giving it a watch. It was pretty…
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Intro to React.js – Agata Krzywda – Medium

  • Intro to React.jsFor the past few months I have been learning react.js by doing a lot of online courses, tutorials, going to workshops and most recently attended to awesome react flipflops course run by Maciej Nowakowski.I learnt a lot on the way and now I am putting together this tutorial with the aim of it being the one tutorial I wish I had when I first got started.This is a introduction tutorial of my series of ’’intro to React.js’’.
  • Editing text on the pageOpen App.js this is your main react component.
  • Create new componentCreate new file in src folder call MyComponent.jsThis is a simple component which says ‘Hello World!’
  • To use that component in App.js we need to import it at the top of the file.import MyComponent from ‘.
  • Using state and methodsIn class components for example App.js we can use state to store informations about our component.State is an object and can give it initial values in constructor, e.gthis.state = { isOn: true };You can access to state in render method using this.state for example if we want use isOn property we get it from this.state.isOnThe button text is determined by the current value isOn property.button{ this.state.isOn ?

For the past few months I have been learning react.js by doing a lot of online courses, tutorials, going to workshops and most recently attended to awesome react flipflops course run by Maciej…
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cans: A framework for building React MobX application

cans: A framework for building #ReactJS #MobX application:  #JavaScript

  • cans: A framework for building React MobX applicationI’ve used MobX for a long time.
  • Every UI component can write as a function of state ((state) = UI), which let you test the UI more easy, just pass different state and expect the return value.Using MobX and React means you get all of it.
  • And then my framework cans came out.What is canscans is a framework for building React MobX application.
  • Note that you can also pass a high order function that return a{ namespace: ‘counter’, observable: app = observable({ /** … **/ })})In this case, you are able to access the app instance, in order to access other models or plugins.viewThe way to react the React component is using mobx-react.
  • The different part is it will be bind in app.plugins, and return not only observable in observable key:ConclusionThe main idea of cans is always to organize your stores.

I’ve used MobX for a long time. It is awesome when I just want a simple state manager for my React application. I always think about how to organize my React MobX application. Because MobX is too…
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