Protected routes and authentication with React Router v4

Protected routes and authentication with React Router v4  #ReactJS

  • In this post we’ll break down the “Redirects (Auth)” example on the React Router documentation to learn how to create authenticated routes (routes that only certain users can access based on their authentication status) using React Router.
  • It would be nice if, just like React Router gives us a component, they also gave us a component which would render the only if the user was authenticated.
  • So now what we’re doing is when the user authenticates, we change to true which causes a re-render and then renders the component taking the user to the route.
  • First, inside of our component when we redirect the user for not being authenticated, we’ll need to pass along the current route they’re trying to visit so we can come back to it after they authenticate.
  • Now we need to modify our component so that if the user was redirected there from a previous route, once they authenticate, they’re taken back to that original route.

Protected routes are an important part of any web application. In this post we’ll break down the “Redirects (Auth)” example on the React Router documentation to learn how to create authenticated routes (routes that only certain users can access based on their authentication status) using React Router.
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Using JSX and React #React #reactjs #javascript #Framework #programming

Using JSX and React  #React #reactjs #javascript #Framework #programming

  • Form creation is easy with JSX and sub-components, for example: – – To make this work, you must create the sub-components as attributes of the main component: – – To use some JavaScript to create a result for use in an attribute value, React just needs you to wrap it…
  • _disconnectFrom(userId); self.emit(events.DISCONNECT, userId); console.log(‘User disconnected’, userId); }); }); console.log(‘Connecting with username’, username); this.peer = new Peer(username, { host: location.hostname, port: 9000, path: ‘/chat’ }); this.peer.on(‘open’, function (userId) { self.setUsername(userId); }); this.peer.on(‘connection’, function (conn) { self.
  • First we use to establish signalling of a new user connected via the as so: – – js ChatServer.prototype.connect = function (username) { var self = this; this.setUsername(username); this.socket = io(); this.socket.on(‘connect’, function () { self.socket.on(events.CONNECT, function (userId) { if (userId === self.getUsername()) { return; } self.
  • _connectTo(userId); self.emit(events.CONNECT, userId); console.log(‘User connected’, userId); }); – – Then, to connect to the PeerServer, we use the following: – – We then listen for events via the method: – – We also have our JSX inside components in the directory.
  • Now it’s as simple as pushing your code to heroku: – – Once the push is finished, you will be able to start your web service with the following: – – Now just visit the URL provided, or as a shortcut use the command as so: – – You’ve learned…

What You’ll Be CreatingJSX is similar to a mix of XML and HTML. You use JSX within React code to easily create components for your apps. JSX transforms into JavaScript when React compiles the…
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Lottie – Render After Effects animations natively on Web, Android and iOS, and React Native

Lottie - Render After Effects animations natively on Web, Android and iOS, and React Native

  • Lottie is a mobile library for Web, and iOS that parses Adobe After Effects animations exported as json with Bodymovin and renders them natively on mobile!
  • Install the zxp manually following the instructions here: Skip directly to “Install third-party extensions” – – Or you can use the script file from here: Or get it directly from the AE plugin clicking on Get Player – – Here’s a video tutorial explaining how to export a basic animation…
  • — with 1 optional parameter name to target a specific animation – – bodymovin.stop() — with 1 optional parameter name to target a specific animation – – bodymovin.setSpeed() — first argument speed (1 is normal speed) — with 1 optional parameter name to target a specific animation – – bodymovin.setDirection()…
  • — with 1 optional parameter name to target a specific animation – – bodymovin.searchAnimations() — looks for elements with class “bodymovin” – – bodymovin.loadAnimation() — Explained above.
  • you can also use addEventListener with the following events: – – Doing this you will have to handle the canvas clearing after each frame – – Another way to load animations is adding specific attributes to a dom element.

lottie-web – Render After Effects animations natively on Web, Android and iOS, and React Native. http://airbnb.io/lottie/
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Why We Use Styled Components – Hacker Noon

Why We Use Styled Components:  by @_alanbsmith #JavaScript #ReactJS

  • That’s not what CSS-in-JS is about regardless of the hype.Styled Components Isn’t the Right Choice for Every TeamI’m not saying Styled Components is better than Radium, Aphrodite, Glamor, Glamorous, Emotion, or any of the other CSS-in-JS libraries.
  • BEM, SMACSS, and other CSS patterns provide a lot of great guidelines for managing styles.
  • 🎉)From my experience, building a component library is the best way to keep UI consistent and predictable across applications, and CSS-in-JS has been the best tooling available to build these libs.Why We Chose Styled ComponentsWe ❤️ Styled ComponentsWe were drawn to CSS-in-JS for the reasons mentioned above, but Styled Components…
  • Along with the basic Sass support, there’s also Polished, a small toolset created by Styled Components to provide additional Sass functionality and other helpful tooling.Native Mobile SupportOur team is also in the process of developing a native mobile app with React Native.
  • Those conversations will help establish patterns for best-practices leading us to more consistent and predictable UI.Final ThoughtsStyled Components has been great for our team, and I think it could be really useful for a lot of other teams as well.

Unfortunately Twitter is not ideal for providing context and longer explanation, and I thought this might be a good way to follow up. Given that, a lot of this article describes what led to our…
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4 Key Concepts to Learning ReactJS

4 Key Concepts to Learning #ReactJS  #React #javascript #webdevelopment #coding

  • Aptly named Create-React-App, the tool scaffolds the file structure for your React app and includes a dev server, as well as a compiler, bundler, and more.
  • With so much to learn already in this library, not having to worry about your boilerplate code is a giant relief and the file structure that the CLI tool provides on install will give you everything you need to dive into creating your Dream App™.
  • They allow you to take methods, variables, and even state objects (another ReactJS feature) and pass them around to different parts of your application as PROPerties.
  • Most web apps use one database to store application state and best practice indicates that React state is treated much the same.
  • PropTypes are a way for you to tell your application what type of data your component should expect to be passed to it.

At Modus Create, our culture is defined by a few key objectives, including the value we place on constant learning and sharing of knowledge. It’s no surprise that when I’m not writing automation tests for a client, I am working on personal projects. With most development projects, there comes a time to decide what tools you want to build your UI with. For my latest project, I decided I wanted to use the React library. The only problem was…I didn’t know React — so I decided to see how far I could get using the resources at my disposal.
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Ethereum Light client with React – Ko – Medium

Ethereum Light client with React  #react #ethereum #reactjs

  • { ssl_fc }frontend wwws mode http bind :443 ssl crt /etc/haproxy/certs/You Cert.pem timeout client 1h tcp-request inspect-delay 500ms tcp-request content accept if HTTP default_backend privatenetwork_backend acl is_privatenetwork hdr_end(host) -i Your domain use_backend privatenetwork_backend if is_privatenetworkbackend privatenetwork_backend mode http option forwardfor option http-server-close option forceclose no option httpclose balance roundrobin option…
  • web3 is official Javascript library for ethereum.npm install –save eth-lightwalletnpm install –save hooked-web3-providernpm install –save web3# Or you may do just npm installA bit of hackIn your Javascript file,// step 1: import web3, eth-lightwallet, and hooked-web3-providerimport Web3 from ‘web3’import lightwallet from ‘eth-lightwallet’import HookedWeb3Provider from ‘hooked-web3-provider’// step 2: you may need to…
  • It’s a bit troublesome though because every time I add new module, I need to do “npm install” at eth-lightwallet directory.Now you are ready to create UIFirst step is creating keystore or wallet with keystore.
  • # I pick the name wallet because in the original document, the term keystore is used both medhod name and generated wallet with keystore and bit confusing.let wallet# get pwDerivedKey password, (err, pwDerivedKey) = { if (err){ console.log(“err 1:”, err) } # goto step.2Step 2 is generate address.
  • # step.2: add new 3 connect to our node (rpc server) with hooked-web3-provider# step.3: prepare providervar web3Provider = new HookedWeb3Provider({ host: “https://your rpc server”, transaction_signer: wallet});const web3 = new Web3(web3Provider);Here you need hooked-web3-provider.

Light client is an ethereum client which keeps only keys. You can check accurate definition here. Traditionally in blockchain world, everyone keep same databases. That’s why we can trust entire…
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#reactjs v16 is MIT licensed: No more licensing issues.

  • Among the changes are some long-standing feature requests, including fragments, error boundaries, portals, support for custom DOM attributes, improved server-side rendering, and reduced file size.
  • Think of error boundaries like try-catch statements, but for React components.
  • According to Sasha’s synthetic benchmarks, server rendering in React 16 is roughly three times faster than React 15.
  • “When comparing against React 15 with compiled out, there’s about a 2.4x improvement in Node 4, about a 3x performance improvement in Node 6, and a full 3.8x improvement in the new Node 8.4 release.
  • Fiber is responsible for most of the new features in React 16, like error boundaries and fragments.

We’re excited to announce the release of React v16.0! Among the changes are some long-standing feature requests, including fragments, error boundaries, portals, support for custom DOM attributes, improved server-side rendering, and reduced file size.
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