How to Connect your React App to a REST API – codeburst

  • Today we are going to connect this app to an existing REST API and use the fetched data to display our previously created list of contacts.Over the whole series of articles, we’re going to build a functional contact list with React:Part 1 — How to Create a React App with create-react-appPart 2 — How…
  • This way, the app fetches contacts at the startup and fills our contact list with data.PreparationsIf you don’t have the source code of the previous part ready, you can clone it from GitHub, install the dependencies and start the appgit clone contacts-managergit checkout part-2npm installnpm startThe app is now available…
  • To begin, let’s install axios: In your root directory (where your package.json is) execute the following command line:npm i -S axiosNext, open your App.js and perform the following actions:add the componentDidMount lifecycle method to the App component.import axios from the just installed packageadd the axios GET request to componentDidMount to…
  • Since it is empty, it is the initial State object with a replaced “contacts” property.Finally — Set the new StateNow that we got our data, picked the relevant parts out of it and created a “new” State object, we store it in the State of the App call, puts the “newState” object as…
  • Also, you learned that if you want to fetch data from a server at the startup of the app, you’ll do it in componentDidMount in a suitable component.You also learned, how to set State and that you can pass an object or a function to setState.Last but not least, you’ve…

In the previous parts of this series you learned how to bootstrap a new React app with create-react-app and create a list component. Today we are going to connect this app to an existing REST API and…
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I’m happy to share a new version of React Input Handler! #reactjs #commit #push #unleash

I’m happy to share a new version of React Input Handler!



#reactjs #commit #push #unleash

  • ( ) } () { ( form label Fullname label input type name onChange { . }
  • label Are you a developer label input type name value onChange { . }
  • For example: – – input type name value onChange { . }
  • checked input type name value onChange { . }
  • input type name value onChange { . }

react-input-handler – ⚡️ Utility function to handle input changes in React.
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#reactjs #commit #push #unleash”

React Components Explained – codeburst

  • Something like thisimport React from ‘react’;class MyComponent extends React.Component { render () { return div This is a component /div }}class MyOtherComponent extends React.Component { render () { return ( div MyComponent / /div ) }}This way you are able to compose more complex and useful user interface for your…
  • Component’s render method return JSX which then use to create real HTML output which will be rendered in the browser.The interesting Thing about render method is that it runs every time when your component State or Props updates.
  • Let me show you a exampleimport React from ‘react’;class MyComponent extends React.Component { constructor(props) { super(props); this.state = { name: “Manoj” }; } render () { return div My name is {this.state.name} /div }}// if we render this component the output will beMy name is ManojIgnore the super(props) (out of…
  • Let’s see an example.class MyComponent extends React.Component { constructor(props) { super(props); this.state = { name: “Manoj” }; this.changeName = this.changeName.bind(this); } changeName () { this.setState({ name: “Your Name” }); } render () { return div onClick={this.changeName} My name is {this.state.name} /div }}In the above code we are telling our React…
  • You can run this code on jsFiddle here.PropsVisualise props as options that can be passed to a component to customize its functionality.For example, I have a heading component which renders a heading with subtitle.class MyHeading extends React.Component { render () { return div h1This is a heading/h1 pSubtitle/p /div }}If…

The simplest library I ever used in my life is React. As you know React is based upon component design. Everything in React is a component which makes it easy to reuse components frequently. You can…
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A visual guide to React Native Performance: Issues and resolving Insights

A visual guide to #reactnative Performance: Issues and resolving Insights

  • A visual guide to React Native Performance: Issues and resolving InsightsFor anyone who is coming from Cordava/Ionic development background, React Native would blow your mind with its easy code sharing, UI advantages, and faster time to market.React Native not only decreases the burden of engineering(as Java/Objective is hard to master),…
  • It is no surprise that Garbage collector does it job, but, due to a bridge between the Native and React Native realm, most components go unnoticed.Credit: GithubEven simpler utility applications such as a hybrid camera app we tested was found to be leaking huge memory.Memory leaks are usually common with…
  • In the screenshot above, you can see that the app size was increased 4x times when it was built using React native.Note: Both of them had exactly the same features, still app size was 4x more in React native.App size drastically impacts — how an application renders its UI components, and allocate the…
  • Read here to see app navigation performance issues with react native and how you can improve them.Infinite scrolling in React NativeMediumLiterally!
  • With best practices, and some lesser known optimisation techniques, you can improve the performance.Aside from what we discussed above, there are so many other performance bottlenecks that you must know before deploying your application.If I had to list few other common issues, they would be:Animating images for different UI viewLack…

For anyone who is coming from Cordava/Ionic development background, React Native would blow your mind with its easy code sharing, UI advantages, and faster time to market. React Native not only…
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A tiny ~700b centralized state container with component bindings for Preact. #reactjs #preact

  • { , , } store ({ count }) If actions is a function, it gets passed the store: ({ ( ) { { count . } }
  • , The above example as an Arrow Function: ({ count }) ({ count count }), ( ) { res ( ) { stuff .
  • , ) } }) ( , actions)( ({ count, increment }) ( div p Count {count} p button onClick {increment} Increment button div ) ) () ( Provider store {store} App Provider ) – – Creates a new store, which is a tiny evented state container.
  • Register a listener function to be called whenever state is changed.
  • If don’t, just open a new clear and descriptive issue.

unistore – 🌶 700b state container with component actions for Preact
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#reactjs #preact”

Container Components and Stateless Functional Components in React – Zsolt Nagy

  • Let’s introduce functional components: – – has become a function with a argument, returning the return value of the method of the original implementation.
  • Implications of the structure of stateless functional components: – – In the introduction, I mentioned that stateless functional components come with performance benefits.
  • Typically, container components have the following properties: – – The rule of thumb for choosing the appropriate syntax for React components is the following: – – then it is advised to use stateless functional components.
  • Let’s put theory into practice, and transform all the stateless component in our chat application into functional components.
  • Reviewing the conditions for modeling a component with a function, we can see that there is absolutely nothing preventing us from creating a functional equivalent of the class.

We will now introduce another way to define simple components. You will not only write less code, but you will also benefit from performance optimizations done by React. Let’s introduce functional components:
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Interview of @matheusml about #redux zero, a light state management solution for #reactjs

  • Redux Zero is a library which offers a simple way to handle state in modern applications.
  • With Redux Zero your component can focus 100% on the UI and just call the actions to update the state: – – Last but not least, plug the whole thing in your index file: – – Redux is great, but in some cases, it’s way too much.
  • With Redux Zero you just have a store and some actions.
  • One of our developers here at Concrete, Miguel Albernaz, was using this gist as a state management solution instead of Redux.
  • Redux Zero is one of the lightest state management solutions I’ve seen so far.

Although using Redux is straight-forward once you understand the approach and its nuances, after a while it gets repetitive. It’s easy to end up with a lot of “boilerplate” code that wires all the logic together. For this reason, multiple solutions addressing the issue have appeared.
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