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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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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React State vs Props explained – codeburst

  • Let me define a React component a plain javascript function side by side.class DummyComponent extends React.Component { render () { return divHey/div }}const DummyFunction = () = console.log(‘Hey’)We defined a React component named DummyComponent and returned a div containing text Hey similarly, we defined a function named DummyFunction and output…
  • Let’s take a look at State.React Component StateA state in React Component is its own local state, the state cannot be accessed and modified outside the component and can only be used inside the component which is very similar to, you already guessed it a function own local scope.
  • Let’s demonstrate this with an example.class DummyComponent extends React.Component { state = { name: ‘Manoj’ } render() { return divHello {this.state.name}/div; } }const DummyFunction = () = { let name = ‘Manoj’; console.log(`Hey ${name}`)}As you can see a component state can be compared to a function local scope.
  • Let’s take a look how we can use props in react.class DummyComponent extends React.Component { render() { return divHello {this.props.name}/div; } }// when using the componentDummyComponent name=”Manoj” /DummyComponent name=”Ajay” /We used one react component in multiple places here but with a different name.
  • Props, on the other hand,make components reusable by giving components the ability to receive data from the parent component in the form of props.We also get to know that React components are pretty similar to normal JS functions so from the next time keep this thing in mind 😉 .

Before jumping to state vs props we have to compare a React component with a javascript plain function. Let me define a React component & a plain javascript function side by side. We defined a React…
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Advanced React Component Patterns – kentcdodds

Advanced #ReactJS Component Patterns:  by @kentcdodds #JavaScript

  • Two of my courses will be (have now been) released as part of Egghead’s annual Christmas course release celebration 🎉 One is The Beginner’s Guide to ReactJS and the other is Advanced React Component Patterns.
  • 👀The course starts with a single lesson where I implement a simple toggle component that manages its own state.
  • My hope is that by doing things this way you can quickly identify the trade-offs of the different patterns and know when each pattern would be most appropriate.The course wraps up by refactoring the toggle component to a redux component affectionately called “Rendux.” I think that you’ll be blown away…
  • This way we can easily create custom components which have access to the toggle component’s on state and the toggle helper function.There are actually six lessons dedicated to Higher Order Components in this course.
  • Hopefully with this refactor you’ll see both the power and the simplicity of the render prop pattern.The basic idea of the pattern is that rather than have the toggle component be responsible for doing anything special in the render method, we delegate that responsibility over to the user and we…

An overview of some of the patterns covered in my recently released Egghead.io course (free until Friday). NOTE: This is a cross-post from my newsletter. I publish each email two weeks after it’s…
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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”

Ivan Linko’s answer to How good is ReactJS for building e-commerce websites?

  • A common E-commerce website usually comprises a plethora of forms to fill, complex filters, elements, which interact with different APIs, maps, etc.
  • With the help of React you can easily implement all of those features, making it a good option to build highly interactive E-commerce websites.
  • One of the great things about React is that it allows for a rather convenient way of storing and manipulating the state of your app (e.g. filtering through items is a change in the state of the app).
  • What’s more, React comes with a whole bunch of ready-made modules for all occasion, not mentioning that it’s easy to test and scale.
  • We’ve used React in some of our E-commerce projects and it recommended itself as a very mature and versatile technology.

A common E-commerce website usually comprises a plethora of forms to fill, complex filters, elements, which interact with different APIs, maps, etc. With the help of React you can easily implement all of those features, making it a good option to build highly interactive E-commerce websites. One of the great things about React is that it allows for a rather convenient way of storing and manipulating the state of your app (e.g. filtering through items is a change in the state of the app). What’s more, React comes with a whole bunch of ready-made modules for all occasion, not mentioning that it’s easy to test and scale.
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Relax with React – Natasha Gitlin – Medium

Relax with React  #props #react #components #state #lifecycle #reactjs

  • With JSX, you pass a function as the event handler rather than a string.ComponentsReact is made up of container and presentational components or as Dan Abramov coined it, smart and dumb.
  • Presentational components are concerned with [how things look], receive data and callbacks with exclusively props and rarely have their own state.
  • Container components concerned with [how things work], provide application data and fetch data.
  • It is just another way of building an MVC framework where the presentational components are the views and container the controllers.LifecycleThe lifecycle of a component are customizable and goes through different phases when the components are in a state of change.
  • A prop supports or keeps something in position whereas a state is a condition that is susceptible to change.Before I dive right into my final project, I need to figure out the proper structure of my application.

I have made it to the final level. I’ve acquired the XP and skillset needed to ascend to the top and attain the apex of web development. Mind you, this is just the first hurdle in my programming…
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