Your Choice JavaScript News

React News Monday, May 7 Node.js, Web app, Interesting task & more…


What’s new?

  • Node.js was developed by Ryan Dahl in 2009, and the platform has now become an exceptional choice for real-time web application development that boosts ROI by providing a highly interactive user experience.
  • Since Node.js uses an event-driven, non-blocking I/O model, its very efficient and lightweight for in-memory usage and data dense real-time web applications that work on multiple devices.
  • With Node.js, developers can automatically send and synchronize data between server and the client side as it allows developers to write JavaScript for both the server and client.
  • Meteor, a web app framework created on top of Node.js, offers support to the same codebase for the client and the server.
  • All the virtues of Node.js mentioned above are the major reasons why many companies now consider Node.js as a good technology for running heavy load web applications and allowing teams to move much faster in bringing their designs to life.

Tags: Node.js, real-time web, web app, real-time web application, real-time web app


  • In order to speed up the process up we decided to handle four requests in parallel and once some of them is finished we pull the next one.
  • Lets start by defining the signature of our queue and put a couple of rules in place: – – Lets first start by processing just two tasks in a consecutive fashion.
  • Inside we define a helper function the role of which is to execute a task and wait for its completion.
  • The whole exercise ends when there are no running workers and there are no more tasks to process.
  • Here is a CodePen to play with That CodePen runs ten tasks and if you check the output in the console you will see how the function works.

Tags: interesting task, consecutive fashion, ‘s body, parallel read, process maximum


  • Provide the name of your project rnCognitoDemo and then select Authentication Providers and in the Cognito Tab provide the User Pool Id and the App client id from the recently created User Pool.
  • identityPoolId: ‘Cognito Identity Pool ID’, – region: ‘Region’, – userPoolId: ‘Cognito User Pool ID’, – userPoolWebClientId: ‘Cognito App Client ID’These values are in different places.
  • After installing packages according to previous guide lets just create our React Native App: – $ create-react-native-app rn_aws_cognito_demoI also recommend installing react-native-scripts on your project: – $ cd rn_aws_cognito_demo – $ npm i react-native-scriptsInstall all packages on the new created project: – $ npm install / yarn installInstall AWS Amplify…
  • js with the following content: – const awsConfig = { – identityPoolId: ‘Cognito Identity Pool ID’, – region: ‘Region’, – userPoolId: ‘Cognito User Pool ID’, – userPoolWebClientId: ‘Cognito App Client ID’ – } – – export default awsConfig;Note: fill the values with the ones configured in your Amazon Cognito account….
  • First lets Sign Up a new user: – AWS Cognito should send you an confirmation code email like this one: – Enter this code in Sign Up Confirmation Screen along with your username: – After Signing Up lets Sign in with our recent created credentials: – After Signing in you…

Tags: react native app, AWS Cognito, basic Authentication app, federated identities panel, Native app connection


  • Before this change, many startups and companies were reluctant to adopt a development framework owned by Facebook under the BSD+Patents License.
  • Facebook uses a license combo called BSD+Patents for most of their open source projects, which of course include React.
  • AlthoughFacebook engineering director Adam Wolff once argued that this system was meant to prevent the risk of patent litigation and that if this license were widely adopted, it could actually reduce meritless litigation for all adopters, this has been a controversial topic.
  • In fact, the Apache foundation banned React last July and WordPress stated it was reluctant to use it for future projects just a few days before Facebook announced the switch last September.
  • After much discussion and some pressure from a couple of key players in the industry, startups and business canfinally use React and React Native without the risk of being sued by Facebook or losing their patents.

Tags: React, Facebook, React Native, MIT License, Facebook engineering director


  • Of course I wasnt concerned whether the client was aware of the file state or not, I just wanted a better UX while the server guy does his thing.
  • However I wanted simple, and I also didnt want to make any Ajax call…and truthfully, I really really really wanted to slap that onClick Event on the button.
  • And on the client side theres a form something like: – – The Highlighted line is the loader image we want to show onClick.
  • There, The onclick event should be invoked only when the user clicks the button and then on page reload we have our default state for the loader.
  • And you could put in your client side validations when no file is chosen (Users could get funky sometimes…).

Tags: page reload, onclick event, better UX, search keywords, programming things


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