React Router DOM v4 Tutorial (with Examples)

#React Router DOM v4 Tutorial (with Examples)  #reactjs #javascript #Programming #coding

  • The < Route > component is one of the most useful components of React Router v4 and the idea behind it is simple, wherever you want to render something when only there is a match with the location’s path you can use a Route component.
  • We can just append the name to be used for the variable plus a colon : to the end of the route’s path, for example: – – When there is a path match an object which has the following properties will be created and passed to the component: – -…
  • First we import the necessary routing components such as Route and BrowserRouter – – Next we create the base layout component, besides common HTML tags we also use React Router v4 components Link and Route: – – Next we create our pages: – – And finally we create the App…
  • In our example app we used the prop exact in the Route for component HomePage – – That’s because React Router v4 uses inclusive routing instead of exclusive routing used by React Router v3 so without exact property the home component will be rendered with all other components, for example…
  • You can also navigate inside your React application using methods from the history object, for example: – – Which are equivalent to: – – Whenever you want to redirect to another location, you can place component which is when rendered will redirect to the location specified in to prop that…

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React Router 4: A Practical Introduction

React Router 4: A Practical Introduction  #reactjs

  • In previous versions of React Router such as v3, route protection code looks like this: – – The component had a prop that accepts a method that allows entry or refusal to a URL location based on a user’s authentication status.
  • In this example, the Auth Service will simply be an object like so: – – Now, let’s build the like so: – – The code above simply illustrates that if the authentication status of the user is true, then a component would be rendered else the user would be redirected…
  • is a higher order component from React Router that allows re-rendering of its component every time the route changes with the same props.
  • Add code to your like so: – – In the code above, we imported a new component, from React Router.
  • Now, all we need to do is map over the routes array as shown in the code below: – – In the code above, whenever the route’s path matches the URL location, the leftbar component will be rendered.

React Router 4 uses declarative approach to routing. In this tutorial, you’ll learn how to use React Router 4 in your web projects via practical examples.
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Snapshot Tests in React Using Jest

  • Today we’re talking about snapshot tests using Jest.
  • When writing snapshot tests using jest, you should basically just follow the next template: – – You use to create a component with desired props, transform it to JSON and then check if it matches a snapshot.
  • Here’s a more concrete example – let’s say we have a dummy component called , for which we want to write a snapshot test: – – For our Input component, it can look something like this: – – To run the test, you just need to type command in terminal….
  • Output snapshot file will be created, and when running the test next time, jest will compare that output snapshot file to our updated component.
  • Keep in mind that all of these output snapshot files should be committed alongside the modules they are covering and their tests, as they are part of the test.

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React Authentication in Depth – Hacker Noon

React Authentication in Depth:  #React #Reactjs #ReactNative #JavaScript

  • First, let’s go ahead and create our React project using Create React App, and change into the new project’s directory: – create-react-app react-auth – cd react-authNext, let’s install React Router and Glamor using either npm or yarn: – yarn add react-router-dom glamoror – npm i react-router-dom glamor –saveAdding the identity providerYou…
  • Next we’ll add user-signin (Amazon Cognito) and deploy the new configuration: – awsmobile user-signin enable – awsmobile pushawsmobile user-signin enable will enable Amazon Cognito in our project with default settings, including 2 factor authentication with SMS (we will add TOTP later).
  • If you would like more control over how your authentication provider is created, you can either pass the -p flag to specify a more detailed configuration (awsmobile user-signin enable -p), or you can go to Amazon Cognito to directly create and configure the service in the console.To see a more…
  • : 2 factor authentication for new user sign up – confirmSignUp(username: string, authenticationCode: string) – signIn — signs in an existing user – signIn(username: string, password: 2 factor authentication for user sign in – confirmSignIn(user: object, authenticationCode: string) – Now, let’s wire this up!
  • When the user signs up using the signUp method, they will receive an authorization code via SMS, and will need to input this value into the form and we will then confirm that this code is correct by calling confirmSignUp: – – Let’s now create the inputs, buttons, and the…

How to do implement world 2 factor authentication (both SMS and TOTP) using React, React Router, and Amazon Cognito In this post, we’ll walk through how to implement real world user sign up and sign…
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Beyond React 16: Time Slicing and Suspense API

  • The latest release of ReactJS which is React 16 ships with a lot of features such as , , , and many others.
  • A sneak peek into new features coming to React was demoed by the creator of Redux and React core team member, Dan Abramov at JSConf Iceland, 2018.
  • Making it easier for developers to build great user experiences using ReactJS has always been the goal of the ReactJS team.
  • Time-slicing allows ReactJS, which now runs on React Fiber, to split computations of updates on children components into chunks during idle callbacks and rendering work is spread out over multiple frames.
  • Besides the steps shown in this section, the guide also shows: – – I’m overwhelmed by the engagement of React core team members with members of the JavaScript community in landing new features in React.

Time Slicing, Suspense and the Fetcher API are new features and concepts that will land soonest in stable releases of ReactJS. Learn how they work.
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OnePageCRM Developer Portal : Rails to AWS lambda: Communication and authentication

Latest developer blog from @OnePageCRM #tech #reactjs #developement #javascript

  • There is a third option, of using the AWS SDK (in our case the ruby gem) from within a rails server to invoke lambda functions directly.
  • For this, AWS API Gateway needs to be configured to accept HTTP requests and pass them onto the corresponding Lambda functions.
  • The alternative of AWS SQS (simple queue service) needs to be paired with AWS SNS (simple notification service) so that the lambda function can be informed that there is a new message for it to process.
  • Compared to interfacing with the AWS SDK lambda gem to execute functions, these solutions have the advantage of being fire-and-forget requests made by the rails server.
  • As in this scenario, we are generating auth data in a Rails server to be passed to Lambda functions, cookies fall away as a possibility (though they would work if both rails and lambda were accessible on sub-domains on the same parent-domain).

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Protected routes and Authentication with React and Node.js

Protected routes and Authentication with React and Node.js  #reactjs  #react #Nodejs

  • Front-end App ArchitectureI’m a huge fan of the React Boilerplate architecture so I created something similar to organize my code: – /src – └─── containers // React components associated with a Route – | └─── App // The entry point of the application – | └─── AuthPage // Component handling…
  • component={AuthPage} / – Route exact path=”/connect/:provider” component={ConnectPage} / – Route path=”” component={NotFoundPage} / – /Switch – /div – /Router – ); – } – } – – export default App;Creating the Authentication ViewsNow that all our routes are implemented we need the create our views.  –  The way we declared…
  • First of all, let’s create a forms.json file that will handle the creation of the form on each auth structure of the JSON will be like the following (you can see a customBootstrapClass key that is needed in the Input component): – { – “views”: { – “login”: [ -…
  • Here is the flow: – The user clicks on login with FacebookIt redirects him to another page so he can authorize the appOnce authorized, Facebook redirects the user to your app with a code in the URLSend this code to StrapiAt this point, we need to implement only one lifecycle…
  • catch(err = { – }); – } – – redirectUser = (path) = { – the Providers in the AuthPage – To do so, we need a SocialLinkcomponent like the following: – /** – * – * SocialLink – * – */ – – import React from ‘react’; – import…

So I started a side project to create a tiny boilerplate with nothing more than Create React App to implement the authentication flow with Strapi, a Node.js framework with an extensible admin panel…
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