JavaScript — Prototype – codeburst

  • prototype, [[Protoytype]], __proto__)/* Code 2 */function Car(name) { this.name = name;}Car.prototype.start = function() { return “engine of “+this.name + ” starting…”;};var c1 = new Car(“Santa Fe”);var c2 = new Car(“Fiesta”);c2.speak = function() { console.log(“Hello, ” + this.start());};c2.speak(); //”Hello, engine of Fiesta starting…”Let’s try to understand the above code with diagrammatic…
  • Both object is having name property and c2 is having an additional method speak() as well.But the important thing happens during the code execution is c1 and c2 gets linked with Car.prototype with internal linkage called [[Prototype]].
  • Understanding __proto__/* Code 3 */function Car(name) { this.name = name;}Car.prototype.start = function() { return “engine of “+this.name + ” starting…”;};var c1 = new Car(“Santa Fe”);var c2 = new Car(“Fiesta”);c2.speak = function() { console.log(“Hello, ” + === Car.prototype); // trueconsole.log(c1.
  • As per above prototype chain diagram, we can see object c1 does not have __proto__ property so it goes through [[Prototype]] chain to Car.prototype object but __proto__ property is not available there as well.
  • __proto__ is an public property of Object.prototype to access the [[Prototype]] is a method to access the __proto__ property.Constructor is a function, called with new keyword in front of it but .

In the below code snippet, we can see that bikeFunc() is having a prototype property inbuilt and similarly by default, object bike is having __proto__ property. In the above diagram, the right side…
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Why Developers Love Node.js & what’s their main issue with it? Survey Results.

  • We were also interested in the infrastructural aspect of running Node.js apps in production, so we asked our readers to share where they deploy their services, what are their preferred front-end technologies, what kind of databases they use and which flavor of JavaScript they prefer.
  • Here come the results of our mini-survey: – – According to our survey, Node.js is a great option for developers who like to get their apps into production as fast as possible.
  • To understand why developers love & use Node.js, let me just show you a sample of the responses we got: – – When we asked developers about what they actually build with Node, the answers gave a pretty clear picture.
  • The answers were pretty hard to synthesise into coherent subgroups, but I tried my best in categorizing them: – – Although these answers are hard to categorize, I think they still provide useful insights into the problems & minds of Node.js developers.
  • The results were not surprising, the hegemony of AWS is clear: – – It looks like that React leads the front-end framework war – when it comes to Node.js developers who need to pick one: – – In case you’d like to learn more about it, read 8 Tips to…

539 devs who use Node.js in production told us why they love using it, what are they using it for, and what are the greatest problems they face with it.
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Simple SVG Dial in #react @CodePen @greensock @reactjs #svg #ui (might be useful!)

Simple SVG Dial in #react @CodePen  @greensock @reactjs #svg #ui (might be useful!)

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React Code Style with ESLint + Babel + Webpack

  • ESLint in JavaScript helps you to set up rules and to enforce code style.
  • You can setup rules for JavaScript and React to enforce a unified code style.
  • ESLint rules apply for a lot of different code style use cases.
  • We could use other extensions as well, but at this time the Airbnb Code Style and the according ESLint configuration are very popular and well accepted by developers.
  • And you can disable a rule in a local file: – – There are a handful of useful style guides in the JavaScript and React community.

You want to setup ESLint in your ReactJs project? But your project includes Babel and Webpack? This article will guide you through all the options with style guides such as Airbnb’s style guide, the setup process for ESLint in React, and more beneficial recommendations to follow styling rules in your project …
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Testing responsive grid design using CSS flex in @preactjs (@reactjs). Link:

Testing responsive grid design using CSS flex in @preactjs (@reactjs). Link:

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Built in Preact.js….
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Vue.js vs. React.js: Comparing Two JavaScript UI Component Libraries

  • At a time where large MVC (model-view-controller) frameworks were cutting edge, two-way data binding was considered a feature, and SSR was mostly used for static webpages, React reversed the trend, focusing on building applications from encapsulated view components, one-way data binding, and using SSR on dynamic web pages via the…
  • Dependency tracking gives Vue’s virtual DOM a slight edge over React out of the box, because it can selectively re-render the child components that are actually affected by a change in state by default — no additional coding required.
  • In React, JSX breaks with the convention of keeping JavaScript and HTML separate, by providing a declarative XML-like syntax that allows you to create self-contained UI components that encapsulate all the instructions required to render them within the view: – – The React code above will render into a simple…
  • Under the React umbrella, we have Flux, the application architecture pattern Facebook developed as a state management solution to avoid issues like the infamous phantom unseen message bug, and Redux, a framework agnostic library for providing a simplified implementation of the Flux pattern, which replaces MVC (model-view-controller).
  • Both Vue and React are cutting edge UI component libraries that make use of a virtual DOM, embrace the components based future of web development, support SSR, and Universal JavaScript.

In this article, we’ll explore some of the key differences between the React.js and Vue.js JavaScript libraries, and learn which might be the best fit for your next web project.
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React Native: A new competitor to native development?

React Native: A new competitor to native development?  #reactnative #tech

  • So, what advantages and disadvantages of React Native app development can we distinguish?
  • Many mobile IT companies consider the ability to develop cross-platform apps as the main advantage of React Native.
  • Therefore, when building an app with React Native framework, developers operate with blocks that can be easily managed.
  • Moreover, as its library only grows with each coming year, it becomes more and more beneficial and easy to use React Native in your mobile development.
  • One of React Native’s main advantages is the possibility to reuse code and build mobile apps for both Android and iOS platforms at the same time.

React Native is only two years old but it has already proved its usefulness. Lolita Rogers weighs in on the advantages and disadvantages.
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Bauble Toggle @CodePen @greensock @reactjs #svg #interactive #ChristmasIsComing

Bauble Toggle @CodePen  @greensock @reactjs #svg #interactive #ChristmasIsComing

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Choose your colour! A bauble toggle made with SVG in ReactJS with GreenSock….
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Vue vs React: Battle of the Javascript Frameworks

  • I’ve created two nearly identical sample applications, one in Vue and one in React, if you’d like to give either framework a shot in the context of the samples in this article.
  • The biggest difference is that React popularized a Virtual DOM (we’ll get into this later) and created a new syntax called JSX that allows developers to write HTML in JavaScript.
  • Unlike earlier JavaScript frameworks that had ‘batteries included,’ both React and Vue are fairly barebones with functionality like routing and state management handled by separate frameworks.
  • Both React and Vue are focused solely on the UI layer, and leave functionality such as routing and state handling to companion frameworks.
  • In Vue there’s no need to call a state management function like , as the data parameter on the Vue object acts as the holder for application data.

React vs Vue.js. Are you in the market for a shiny new JavaScript UI framework? Find out the main similarities & differences between these two popular ones.
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Our Journey Building a React Native App

  • Magento specialists, The App Store and The Play Store – three things rarely spoken about in the same sentence – – Then an existing client of ours, one that’s been having month on month growth from an existing Mobile-friendly website we built for them, approached us with a new request:…
  • React Native is a platform that allows Javascript developers to create Apps for both iOS and Android, all from the same Codebase.
  • There are other solutions out there than achieve similar results, but some of the reasons for choosing React Native were as follows: – – So we had the answer now, yes – JavaScript developers can produce an application that will run run on both iOS and android (thanks to react…
  • I don’t think it’s a good idea to become an Angular developer – or a React developer, you should instead strive to become an expert in JavaScript – doing so will allow you adopt new tools, libraries and frameworks as they come in and out of fashion without much work….
  • Jest – – There’s a huge amount of regular JavaScript that goes into a React Native application – especially when you’re handling side-effects away from components like we are with redux-observable.

Then an existing client of ours, one that’s been having month on month growth from an existing Mobile-friendly website we built for them, approached us with a new request: An App on both iOS and Android, capable of covering some of the offline features not currently possible on the Web.
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