Power of #TypeScript for #React part 3 is ready 🚀 Today looking at Actions #JavaScript…

  • Actions are a really helpful way to create separation between the different layers of an application, because they are not tightly coupled each layer can be built and tested in pieces.
  • It does bring it’s challenges however, whilst the code is loosely coupled, all areas of the code which interact with the action need to have the same expectation of it’s structure.
  • At Seccl all our actions follow the same basic structure and TypeScript allows us to define what that is by using an .
  • So now that we know the flavours, let’s look at an example of our action interface in the wild.
  • What we will create is an interface which describes the called and an action creator which builds the action.

Frontend leadership, Frontend architecture, HTML(5), JavaScript (OOJS, ES6, TypeScript), CSS (BEM, Less, SASS, Stylus), Testable Code (Mocha, Sinon, Chai, Karma), NodeJs (Express, Mongoose) , Cloud Applications (Heroku, S3, Azure)
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ReactJS Authentication Tutorial, Part 2

ReactJS Authentication Tutorial, Part 2  #web_dev #front_end #cli #reactjs #Programming

  • The component is pulling data from an API, so it needs a way of holding that data.
  • In the constructor, we define the initial state as seen in the code below:

    In the method, we call the method we exported from the helper file and set state as seen below:

    Now, we took advantage of one of the ReactJS lifecycle hooks, .

  • So, we invoked the method in the hook as seen below:

    All we are trying to do is tell ReactJS to load the data from the API immediately when the component gets rendered.

  • Finally, we rendered the component with the ReactJS method.
  • This renders the root component in the div, which is the starting point of our ReactJS application.

We continue our series on creating an authenticated ReactJS application by looking at how to setup our front-end with the help of Facebook’s CLI tool.
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Building User Interfaces with Pure Functions and Function Composition in React

  • This idea is so important in React that React 0.14 introduced Stateless Functional Components which allows the code above to be written as normal functions (and which we’ll cover more in depth later in the course).
  • Perhaps one of my favorite things about React is it’s given me a light introduction to functional programming (FP) and a fundamental piece of FP are pure functions.
  • splice is not a pure function since each time we invoke it passing in the same arguments, we get a different result.
  • Well the main reason is React’s render method needs to be a pure function and because it’s a pure function, all of the benefits of pure functions now apply to your UI as well.
  • Another reason is that it’s a good idea to get used to making your functions pure and pushing “side effects” to the boundaries of your program.

👋 I’m Tyler. I’m a Google Developer Expert and a partner at React Training where we teach React online, in person, and build OSS like React Router.
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Deploy an AngularJS Ecommerce App in 4 Steps – Hacker Noon

  • Deploy an AngularJS Ecommerce App in 4 StepsThis Ecommerce App is built using AngularJS, Node.js and Cosmic JS.In this blog I will demonstrate how to Install and Deploy an AngularJS Ecommerce Application built using AngularJS, Node.js and Cosmic JS.
  • Simply install and deploy the application, and within two clicks you can set up your Stripe keys as Environment Variables to begin accepting orders and processing transactions with your new AngularJS Ecommerce App.2.
  • Install the AngularJS Ecommerce AppCosmic JS gives you the ability to filter between utilities and programming languages.Cosmic JS Ecommerce App3.
  • Connect Stripe KeysAfter you deploy, you can set your Stripe keys as environment variables by going to Your Bucket Deploy Web App Set Environment Variables.Cosmic JS is an API-first cloud-based content management platform that makes it easy to manage applications and content.
  • If you have questions about the Cosmic JS API, please reach out to the founders on Twitter or Slack.Carson Gibbons is the Co-Founder CMO of Cosmic JS, an API-first Cloud-based Content Management Platform that decouples content from code, allowing devs to build slick apps and websites in any programming language they want.

In this blog I will demonstrate how to Install and Deploy an AngularJS Ecommerce Application built using AngularJS, Node.js and Cosmic JS. This Ecommerce Application allows you to process orders from…
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React in Action is 50% off today. #React #reactjs

React in Action is 50% off today.  #React #reactjs

  • Grokking FRP teaches you a new way of thinking about programs and data as well as how to build robust and extensible user interfaces with the power of functional reactive programming.
  • Packed with illustrations, this book presents dozens of concrete, real-world problems and then shows you how FRP helps you solve them.
  • Use this same code to get half off Usability Matters and Reactive Application Development

Grokking FRP teaches you a new way of thinking about programs and data as well as how to build robust and extensible user interfaces with the power of functional reactive programming. Packed with illustrations, this book presents dozens of concrete, real-world problems and then shows you how FRP helps you solve them.
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Testing with Mocha – Kevin Wang – Medium

Testing with Mocha  #tdd #react #mocha #javascript #reactjs

  • js file and running “npm test” in the console.var assert = function() { describe(‘#indexOf()’, function() { it(‘should return -1 when the value is not present’, function() { assert.equal(-1, [1,2,3].
  • indexOf(4)); }); });});The test should pass and you should see the below.From the example above though, the function that the test is testing for is written in the same file.
  • toFixed(2) }, sleepApneaIncrease: function(amount){ return (amount * 1.06).
  • toFixed(2) }, heartDiseaseIncrease: function(amount){ return (amount * 1.17).
  • toFixed(2) }, checkCondition: function(amount, condition){ switch (condition) { case “Allergies”: return case “Sleep Apnea”: return case “Heart Disease”: return default: return 0; } }}I store them all in an object so thatI am able to export out and require them when I need to.

My first experience with Mocha is at Flatiron. When we were doing Javascript labs/work we used Mocha to test out the code that we wrote, it made sure that the results are as we expected. This was my…
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