Horizontal scroll animations in React Native – codeburst

  • Horizontal scroll animations in React NativeLink Animated with ScrollView to create a nice navigation UI animation in React NativeWhat we will be buildingRN lets you build a nice and smooth UIWhat you will needReact NativeSimulatorNo third party libraries required :)Creating Screen component with AnimatedFirst, import Animated, Dimensions, ScrollView, StyleSheet, Text, View from “react-native” .
  • Next, create a component that will be treated as a screen or a view.We are using Animated.View here because we are going to animate that wrapper component.That width ofscrollPage style and are important because we are going to interpolate horizontal scrolling values to multiple animation values.
  • In other words, we are going to track where the screen is and animate the screen component based on that value.It’s one of the things that are tricky to explain in words, but it is the key concept to understand for this to work.Basically, we link animations based on the…
  • When the scroll position is at 150, first screen is half way done exiting, and the second screen is half way done entering.Adding animationsSince they are all set up, it is time to write the animations.
  • You would have to write a different inputRange since FlatList removes items that scroll way off screen.I think this is pretty neat UI animation that’s pretty simple to use.

That width ofscrollPage style and transitionAnimation(props.index) are important because we are going to interpolate horizontal scrolling values to multiple animation values. In other words, we are…
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Key concept and Its necessities in React component – Shubham Akodiya – Medium

Key concept and Its necessities in React component  #es6 #react #reactjs

  • /ChildKey’;class ParentKey extends Component { constructor() { super(); this.state = {activeIndex: 0}; } updateIndex = () = { const {activeIndex} = this.state; this.setState({activeIndex: activeIndex + 1}) }getContent() { const {activeIndex} = this.state; let element; switch(activeIndex) { case 0: element = ChildKey name=’abc’ updateData={this.updateIndex} / break; case 1: element = ChildKey…
  • getContent() method returns the ChildKey component as per the activeIndex value.So Because the activeIndex default value initially set to 0, The initially getContent method returnselement = ChildKey name=’abc’ ChildKey component, we’ve initiallize the state i.e state = {childName: props.name} and when clicking on change parent component state link, then parent…
  • So name ‘bcd’ is printed and the element var becmes like below -element = ChildKey name=’bcd’ here we’re not using the key props, In ChildKey component.
  • Here react assuming both are same, So when constructor is call (constructor is called only one time in component life cycle), It initializes the state childName to ‘abc’ and In second time (when activeIndex changes to 1) constructor is not called, because react don’t know that It is separate component….
  • /ChildKey’;class ParentKey extends Component { constructor() { super(); this.state = {activeIndex: 0}; } updateIndex = () = { const {activeIndex} = this.state; this.setState({activeIndex: activeIndex + 1}) }getContent() { const {activeIndex} = this.state; let element; switch(activeIndex) { case 0: element = ChildKey name=’abc’ key=’23422%%%%’ updateData={this.updateIndex} / break; case 1: element =…

Most of the user had faced the problem of ‘key error’ i.e Warning: Each child in an array or iterator should have a unique “key” prop. Check the render method of xyz component, while using the custom…
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Reason with Sander Spies

  • Reason is built on top of OCaml, why would anyone do that?
  • So when you are writing Reason,  how does that work in term of Java Script?
  • When you compile Reason, What does that Java Script look like?
  • Peter ask about learning Reason.
  • Peter ask about how to contribute to Reason or OCaml

    What are the high level goal of Reason?


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The New Kid on the Block

Meet @mxstrbng - a new member of our #NeosCMS team working on the #reactjs UI:

  • After that I attended the Neos Barcamp, the other two sprints since then and the Neos Conference.
  • All this was much fun especially to see the development of the project not only from a remote point of view but also to contribute to the React UI development.
  • My focus in the Neos project is clearly on the React UI rewrite which we plan to release at the end of the year, but I’m also fixing some little things in Neos or Flow if they catch my eye.
  • I’m not only interested in React, Javascript and PHP but in computer science in general and different kind of programming languages.
  • So, this is me 🙂

    if you are not sure if you want to join the development of Neos and Flow, also as a non programmer, you should join a sprint and see what’s going on there!

Hi I’m Max, 27 and I  became a Neos team member on the 5th July.
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Choosing a frontend framework in 2017 – This Dot Labs – Medium

Choosing a #frontend framework in 2017:  #EmberJS #Meteor #ReactJS #AngularJS

  • Many developers were attracted to Angular.js because it was built by Google which gave Angular.js automatic credibility.At about the same time, Web Components specification promised to make it possible for developers to create reusable widgets that were isolated from their context and were easy to compose with other widgets.The Web Components specification was four separate specifications that worked together.HTML Template — provides HTML markup for the componentCustom Element — provides a mechanism to create a custom HTML elementShadow DOM — isolates the internals of the component from the context that rendered itHTML Import — makes it possible to load the Web Component into a pageA team at Google created a polyfill library that provided Web Components for all browsers at the time.
  • The Ember.js team looked at large Backbone applications to find similarities.They identified the need to render nested views where some parts of the application where consistent while other parts changed from one part of the app to another.They also saw the URL as a key player in the architecture of web applications.
  • Some brave Backbone developers were adding React as views to their applications to fix performance problems that they were encountering.In response to the threat posed by React, the Ember core team created a plan to adopt ideas introduced by React into the Ember framework.
  • They recognized the need for backward compatibility and created an upgrade path that allowed existing applications to upgrade to a version of Ember that included a new React-inspired rendering engine.Over the course of 4 minor releases Ember.js deprecated Views, moved the community to a CLI-based build process and made component-based architecture the foundation of Ember application development.
  • The Angular team calls the new framework a platform because they plan to provide everything that a professional developer needs to build web applications.

There’s been a lot of development in the frontend frameworks ecosystem over the last seven years. We’ve learned a lot about what it takes to build and maintain large applications. We’ve seen many new…
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Topcoder Getting Started with ReactJS

Getting Started with ReactJS - A blog that is supplemented by a Fun Challenge!

  • ReactJS uses JSX to transpire the HTML element on the web page.
  • React first converts JSX into a JavaScript file that is rendered by the browser, resulting in HTML code.
  • BABEL converts JSX code in JavaScript and takes care of cross-browser compatibility.
  • ReactJS functions are called components.
  • ReactJS gives us power to pass data between components and we do it using props and states.

Have you ever thought of passing your HTML code into JavaScript code? How about displaying HTML elements via JavaScript?
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Adding react to your node app – Tyler Swayne – Medium

Adding react to your node app  #react #expressjs #sailsjs #node #javascript #reactjs

  • Instead, I’d like to talk about how to start using it; specifically, in an mvc (or MVC-ish) node app, or really any node application that uses the server to fetch data and render a view with a templating engine.A little while ago, I decided to learn a front-end framework.
  • From what I had read about react at the time, it has the benefit of being potentially light weight, “just the V in MVC”, and after reading more I decided that would be a great solution – add react to my app to get all of the flashy functionality I wanted, learn a front end framework, huzzah!Learning the bones of react was actually a relatively quick and easy experience.
  • I still didn’t quite understand webpack or babel, I didn’t know how to go about passing server-side data to my react component (at least elegantly), and even getting to this point took me a lot longer than I’d like to admit.Soon after all of this I was presented with the opportunity to add react to one of our apps at my real job.
  • I settled on React on Rails (the app was a rails app) and it took me minutes to generate a webpack config, write a small component, add a line of code to my view, and have my react component rendering with server side data.
  • I have used react-helper in a handful of my projects now and it really is a simple solution to adding react to a node app and a big time saver.

React is great, we all agree, so I won’t ramble on about why to use it (I don’t think “we” as developers have ever “all agreed” on anything). Instead, I’d like to talk about how to start using it…
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