Migrating to React’s New Context API – kentcdodds

📝 Article => Migrating to React’s New Context API by @kentcdodds  | #ReactJS

  • Because of this significant change, I’m making an update to my advanced component patterns course on Egghead.io to use the new API rather than the old one.
  • The Old Context APIHere’s the version of the implementation with the old context API: – const TOGGLE_CONTEXT = ‘__toggle__’ – function ToggleOn({children}, context) { – const {on} = context[TOGGLE_CONTEXT] – return on ?
  • null : = { – [TOGGLE_CONTEXT]: ToggleButton(props, context) { – const {on, toggle} = context[TOGGLE_CONTEXT] – return ( – Switch on={on} onClick={toggle} {…props} / – ) – } – ToggleButton.contextTypes = { – [TOGGLE_CONTEXT]: Toggle extends React.Component { – static On = ToggleOn – static Off = ToggleOff – static…
  • on}), – () = ) – getChildContext() { – return { – [TOGGLE_CONTEXT]: { – on: this.state.on, – toggle: this.toggle, – }, – } – } – render() { – return div{this.props.children}/div – } – }With the old API, you had to specify a string for what context your component…
  • Here’s my new version of this same exercise: – const ToggleContext = React.createContext({ – on: false, – toggle: () = {}, – })class Toggle extends React.Component { – static On = ({children}) = ( – ToggleContext.Consumer – {({on}) = (on ?

With the recent release of React 16.3.0 came an official context API. You can learn more about the why and how behind this API from my previous blog post: “React’s ⚛️ new Context API”. Because of…
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Deploy a React Application on Linode

Build a simple, convenient deployment pipeline for #React.js apps on your Linode.

  • Since a basic React app is static (it consists of compiled HTML, CSS, and JavaScript files), it is easy to deploy from a local computer to a Linode using Rsync.
  • This guide shows how to set up your Linode and local machine so that you can easily deploy your app whenever changes are made.
  • Most of the time, this will be , but you can adjust the path and the directory name for your needs: Set permissions for the new directory to allow your regular user account to write to it: – – Ensure your web server is configured to serve from the file…
  • Modify the in your virtual host file: webmaster@mydomain.com mydomain.com www.mydomain.com ## Modify this line as well as others referencing the path to your app combined Modify the line starting with in the server block for your site: Restart the web server to apply the changes.
  • This script will check out the master branch of your project on Git, build the app using , and then sync the build files to the remote Linode using Rsync.

Learn to deploy a locally developed React application to your Linode using Rsync.
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WordCamp Europe 2018: Unit Testing Workshop

  • Since the first official German WordCamp in Hamburg in June 2014, Thorsten fell in love with both the WordPress community and WordCamps , in particular, where he likes to both gain and share knowledge .
  • Something that was kept a secret for far too long has just been unveiled: together with my friends and fellow WordPressers, Carl Alexander and Giuseppe Mazzapica, I will be having both the honor and the pleasure of hosting a three-hours-long workshop at WordCamp Europe 2018.
  • Well, the topic of the workshop will be unit testing, and here is what we put in the application: – – We’ve all had these “Wait, what?
  • While you might benefit from having heard one or another thing about unit testing, or software testing in general, there is absolutely no prior knowledge or experience required in order to sign up for this workshop.
  • But downloading PHP, or installing MAMP, or booting up your VM for the very first time is something that should have happened before the workshop.

I’m super excited to be hosting a workshop on unit testing at WordCamp Europe 2018. If you want to know why that is, you might want to read this post.
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React State From the Ground Up

#ReactJS State From the Ground Up #JavaScript

  • State, in React, is a plain JavaScript object that allows you keep track of a component’s data.
  • The initial state of the App component has been set to a state object which contains the key username, and its value using .
  • Initializing a component state can get as complex as what you can see here: – – An initialized state can be accessed in the method, as I did above.
  • Your component should look like this; – – A state can be passed as props from a parent to the child component.
  • This method will be used to update the state of the component.

As you begin to learn React, you will be faced with understanding what state is. State is hugely important in React, and perhaps a big reason you’ve looked into using React in the first place. Let’s take a stab at understanding what state is and how it works. What is State? State, in React, is a plain JavaScript
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#Reactjs Isometric Grid #Webdesign

#Reactjs Isometric Grid  #Webdesign

  • animations are acting weird in the prop of cell.
  • set SEE #9 axis of rotation is weird or not what you want set the property of prop of Cell.
  • npm start Start the storybook, which has several different examples to play with.
  • npm run storybook npm npm run lint Lints and builds the code, placing the result in the dist directory.
  • This build is necessary to reflect changes if youre `npm link`-ed to this repository from another local project.

react-isometric-grid – React Isometric Grid :stuck_out_tongue: Inspired by Codrops Isometric Grids
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Using Bootstrap With create-react-app

  • From your project folder, enter the following: – – Now the Bootstrap files will be located in your folder.
  • This is where we will put our bootstrap source files.
  • You will need to have the installed globally, so from your command line enter: – – You will also need grunt and other libraries install locally into your project, so enter the following from your project folder – – In order to import your bootstrap files, you need to create…
  • From our command line inside of our project folder we can now enter to compile our LESS files one time, or we can enter to watch the source files and compile on any changes.
  • Once you have built your application using Bootstrap, you can at the end go through and edit the source files so that 1) you only import the Bootstrap components which you are using and 2) make sure all the components look exactly the way you want them to.

These days, starting a web application is very easy. Using create-react-app along with Bootstrap will give you everything you need.
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The Pros and Cons of ReactJS for your Online Business

The Pros and Cons of ReactJS for your #OnlineBusiness via @janlgordon

  • With React, it is possible for webmasters and online business owners to develop large web-based applications that change data while reloading pages.
  • Webmasters can also use React together with other forms of frameworks or JavaScript libraries like Angular in MVC.
  • It makes it possible to reuse components that didn’t produce changes, and this makes programming more comfortable and precise for online business owners.
  • The great news for webmasters is that Google might still find the React component when just the client-side is rendered.
  • ReactJS is a great framework for online business.

This isn’t quite a ReactJS guide for the layman. But it is a useful for business owners, if only to glean enough to know how to talk with your techie
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The Pros and Cons of ReactJS for your Online Business

The Pros and Cons of ReactJS for your Online Business  via @janlgordon

  • With React, it is possible for webmasters and online business owners to develop large web-based applications that change data while reloading pages.
  • Webmasters can also use React together with other forms of frameworks or JavaScript libraries like Angular in MVC.
  • It makes it possible to reuse components that didn’t produce changes, and this makes programming more comfortable and precise for online business owners.
  • The great news for webmasters is that Google might still find the React component when just the client-side is rendered.
  • ReactJS is a great framework for online business.

This isn’t quite a ReactJS guide for the layman. But it is a useful for business owners, if only to glean enough to know how to talk with your techie
Continue reading “The Pros and Cons of ReactJS for your Online Business”

Express more tests via public API · Issue #11299 · facebook/react · GitHub

  • Sign up for a free GitHub account to open an issue and contact its maintainers and the community.
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react – A declarative, efficient, and flexible JavaScript library for building user interfaces.
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Controlled Forms in React – Byte-sized React – Medium

Controlled Forms in React  #tech #webdevelopment #programming #javascript #react #reactjs

  • Defining a form’s input value via state is considered a controlled component.For controlled inputs you will need a corresponding state and then a class method to update that state with changes.Let’s walk through a quick example with CodePen.
  • If you don’t know how to set up CodePen with React, you can check out this story.Let’s also add Boostrap 4 to our CodePen so our forms aren’t so plain.Add this to your JS file:class App extends React.Component { constructor(props) { super(props); } render() { return ( div className=”form-group container” labelControlled Form Input/label input type=”text” className=”form-control” aria-describedby=”emailHelp” placeholder=”Update input here” / large className=”form-text text-muted” Form Output /large /div ); }}ReactDOM.render( App /, your CodePen should look like this:Right now our form input is not controlled- meaning that the value of the form input is not determined by the state.
  • Let’s add a state value for the form making it a controlled form.Declare the state value in your constructor.constructor(props) { super(props); this.state({input: ”}); }Then let’s pass the state input value down to the value of the email form and as the value of our output text.input type=”text” className=”form-control” aria-describedby=”emailHelp” placeholder=”Update input here” value={this.state.input}/ large className=”form-text text-muted” {this.state.input} /largeNow notice how the value of the form reflects the state, but the form value doesn’t update.
  • Let’s add a method to update state, and pass it down using the onChange event handler.Add the method to your constructor.constructor(props) { super(props); this.state = ({input: ”}); this.formUpdate = define the formUpdate method.formUpdate(event) { this.setState({input: event.target.value});}The formUpdate function needs to be called whenever a change is made to the form input.
  • Use the onChange react event to trigger the formUpdate method.input type=”text” className=”form-control” aria-describedby=”emailHelp” placeholder=”Update input here” value={this.state.input} time a change happens to the form the formUpdate method will be called with the event object.

Form input values can be set to state values and then updated via React events. Defining a form’s input value via state is considered a controlled component. For controlled inputs you will need a…
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