Building Mobile Applications with React Native. A brief introduction.

Building Mobile Applications with #reactnative. A brief introduction.

  • If you open your App.js you’ll encounter something along the lines of: – Components are the core of React Native, every visual element of your app is a component.
  • This styling cheat sheet is very handy when you’re getting started to check on what properties are available when styling components, but for a complete description the go to place is the online React Native documentation.
  • There are many basic elements that React Native provides as starting points and building blocks for our components: Views, ScrollViews, Text, TextInput, Touchable components that respond to touch input, Image, etc… As your UI starts growing and you have the need to add more and more Native components you’ll start…
  • Props and State – These are important concepts that will bring functionality, customisation and the ability to reuse components throughout your application.
  • We’ve created a new component that makes use of props and state to render a few text elements to the screen of our app’s.

The number of mobile devices is estimated to cross the 5 billion [1] mark between 2018 and 2019. This is pushing the mobile application development market forward, with the ever increasing demand for…
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Why ReactJS Is More in Demand

Why #ReactJS Is More in Demand

#WebDev #javascript  #WebApp

  • As stated already, the most compelling feature of React is that it reduces the complexities of user interface.
  • If the mechanism that we are trying to interface can comprehend Javascript, we can use React to build the user interface for it.
  • You describe the user interfaces in React languages and tell it what you want, it will take care to translate your description and prepare the actual interface.
  • You will illustrate user interfaces to React with simple components.
  • When state of a component changes, its User Interface will change automatically.

ReactJS is a JavaScript library for building user interfaces. According to Google Trends data last 5 years in increased popularity of ReactJS development and we explain why ReactJS is more in demand.
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Sending events to JavaScript from your native module in React Native

Sending events to JavaScript from your native module in #reactnative

  • Sending events to JavaScript from your native module in React NativeCommunication between native modules and JavaScript thread happens through an event bus or, to be more specific, the bridge.
  • AndroidSending events from your Java module to JavaScript is pretty simple.
  • The easiest way to optimize your module and avoid this warning is to override startObserving and stopObserving methods where you set flag hasListeners and send events only when it is YES.
  • JavaScript code can subscribe to these events by creating a new NativeEventEmitter instance in your module.
  • This is the difference between iOS and Android but if you have just one module with event emitter, you can simplify it by creating something like this: – You have now one file with the emitter for both platforms.

Communication between native modules and JavaScript thread happens through an event bus or, to be more specific, the bridge. In my last article I described how to check what passes through your…
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7 Best Javascript Frameworks 2018 For Web Developers

  • Node.js provides server-side scripting feature as javascript Frameworks to runs server-side scripts to produce dynamic web page content.
  • Angular JS 2 stand among the most popular Javascript frameworks which is used by many developers to build and maintain complex web applications.
  • It contains different functionalities similar to other javaScript frameworks contains  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 for 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.
  • Hence, Many JavaScript frameworks offer innovative features to manage complexity in web applications with an integrated development toolkit that enables rapid iteration.

JavaScript is a scripting language used in web development to add dynamic and interactive elements to the websites using various Javascript Frameworks
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Continuous Integration for React Native

#Continuousintegration & #reactnative. Match made in heaven!

  • This guide is for you if… – – We will show you how to setup Continuous Integration for React Native builds in just a few clicks using Nevercode.
  • When the scanning completes you’ll be presented with three options: – – The Project selection here means a directory in your repository where your React Native configuration file is stored.
  • Nevercode installs the dependencies listed out in your project’s file automatically using Yarn package manager right after your repository is cloned for building.
  • Signing React Native applications in Nevercode is done just like it is with native Android and iOS applications.
  • With support for React Native, iOS, Android, Cordova and Ionic, Nevercode is truly a mobile developer’s choice to release defect-free mobile apps faster.

One tool to build them all
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Introduction to ReactJS

#javascript #reactjs #webdev #womenintech

  • ReactJS focuses only on the rendering of View (part of MVC), as it does not implement the entire MVC pattern, but tightly focuses on the development of components (views) which are displayed on the user-interface so that it is more efficient in developing dynamic and interactive user-interfaces and its components….
  • Traditionally, when we used to change the data (model in MVC) at server-side, we used to reload the entire page (at client-side) to implement or reflect the updates from the server, which make processing very slow and creates bad user-experiences.
  • But ReactJS has solved these issues as it works at the client-side and takes care of the updates from the server by just changing those particular components or parts of interfaces which are changed, and it does not reload the entire page.
  • DOM (Document Object Model) is the user-interface or HTML document which is rendered or displayed on the screen, and if we have to rerender the entire DOM every time to reflect the changes that come from the server, it would be very expensive and take many CPU-cycles and processor time….
  • To overcome these issues, ReactJS creates Virtual DOMs in memory and whenever any data is changed at the server, ReactJS rewrites the Virtual DOM, and then it performs “diff” operations between all Virtual DOMs… one which was created initially and the other which is created after the change of data….

ReactJS is a JavaScript library used to develop dynamic user-interfaces or the components of user-interfaces like search bars, sliders, and widgets in web applications. ReactJS focuses only on the…
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Announcing ReForm: Making forms sound good again with ReasonReact

Announcing ReForm: Making forms sound good again with ReasonReact


#Reactjs #javascript

  • Announcing ReForm: Making forms sound good again with ReasonReactReForm short demo, check the source out at are really complex beasts and can scale to total chaos really quickly if you don’t know how to manage all those field states and validations altogether.
  • The nicest solution in React world is to lift the state of the form to some other component, which will take care, protect and give love to your form state.
  • In ReactJS there is a nice amount of solutions for dealing with form data management (Formik, Redux Forms, etc).
  • One of the first things I wanted to try to unleash the power of Reason’s type system was in forms, that’s why we developed ReForm.
  • ReForm still on its early stages and certainly still there is a lot to improve from community suggestions, but we are already loving to deal with its thin API using it for both web and native worlds with React Native.

Forms are really complex beasts and can scale to total chaos really quickly if you don’t know how to manage all those field states and validations altogether. The nicest solution in React world is to…
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React JavaScript for web development. For SD-WAN solution

The Internet is written in JavaScript- Latest development trends  #SDWANSolutions #SDWAN

  • They focus mainly on Single Page Applications (SPAs) that allow you to perform client-server operations in a single web page without having to refresh the page.
  • Among the most popular web development frameworks out there are Angular.js, Vue.js or React.js.
  • When a state change occurs in React.js, those functions are once again executed to determine a new virtual representation of the page.
  • This result is then automatically translated into the Document Object Model (DOM, that is, the web object representation) changes necessary to reflect the new page presentation.
  • At Teldat, our use of React.js to develop web applications for our network device clients on our SD-WAN solutions, allows us to offer attractive, robust and efficient applications that the end user finds easy to use.

Web development centered on JavaScript language. Especially React.js. Use React.js for web applications of network solutions… Teldat SD-WAN solution.
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React Native Performance Optimization and Profiling

#reactnative Performance Optimization and Profiling

  • State of React Native performanceReact per default re-renders a component every time its parent receives new props or updates its state, that’s one of many reasons why the React paradigm for building UI’s is superior.
  • Luckily many of the standard React Native components executes on a separate thread known as the main thread.
  • If you are offloading work from JavaScript to the native side prevent the bridge from becoming overloaded by monitoring how many times data are sent and received over the wire.
  • class Component extends React.Component { – renderSectionHeader = () = View style={…} /render() { – return ( – FlatList – {…this.props} – / – ) – } – }If you still consider to handle navigation on the JavaScript side or you are struggling with frame drops during animations.
  • class AfterInteractions extends React.Component {state = { interactions: true } – – componentDidMount() { – = { – this.setState({ interactions: false }) – }render() { – if (interactions) { – return null – } – return this.props.children – } – }Animations in React Native looks good and are easy to…

React Native is a popular technology for engineers who are looking for building mobile applications in a productive way without compromising on native performance. Devices today comes with multi core…
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Kotlin vs. React Native: Which Is Better?

Kotlin vs. React Native: Which Is Better?

  • Kotlin, a programming language, pitched against React Native, a JavaScript library – let’s see what sticks and what slips.
  • Same app quality: This might not mean anything to some of you, but apps developed in React Native vs. apps developed in Kotlin feel the same.
  • If you compare an optimized Kotlin app with a React Native app, React Native will fall behind.
  • If your developer does not have apt knowledge about the native language (iOS or Android), which is something (he/she) was probably avoiding in the first place by choosing React Native, this will be a major problem.
  • Using React Native for its intended tasks performs quite well – but I think, this JavaScript library, with all its goods and glory, cannot outweigh Kotlin as a language.

This post covers the basics of the Kotlin programming language and compares it to the React Native JavaScript library for mobile application development.
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