Microservices with Docker, Flask, and React

  • To connect the client to the server, add a method to the class: – – We’ll use Axios to manage the AJAX call: – – You should now have: – – To connect this to Flask, open a new terminal window, navigate to the flask-microservices-users, activate the virtual environment, and…
  • Kill the Create React App server, and then run: – – We still need to call the method, which we can do in the : – – Run the server – via – and then within Chrome DevTools, open the JavaScript Console.
  • What would happen if the AJAX request took longer than expected and the component was mounted before it was complete?
  • Finally, update the method to display the data returned from the AJAX call to the end user: – – Let’s create a new component for the users list.
  • Add a new file to that folder called UsersList.jsx: – – Why did we use a functional component here rather than a class-based component?

If you’re new to React, review the Quick Start and the excellent Why did we build React? blog post. You may also want to step through the Intro to React tutorial to learn more about Babel and Webpack.
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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 didnโ€™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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Why Do Developers Now Compare Vue.js to JavaScript Giants Angular and React?

Why Do Developers Now Compare #VueJS To #JavaScript Giants #AngularJS And #ReactJS?

  • It was 2016 when Vue.js rose to fame and gained so much traction that itโ€™s now seen as an alternative for even well established JavaScript libraries, such as Angular and React.
  • Since Angular belongs to search engine giant Google and React comes from social media behemoth Facebook, developers still trust and use those libraries more than Vue.js.
  • This blog attempts to shed light on why there is a growing belief among developers that Vue.js is set to become the top JavaScript library, leaving behind Angular and React.
  • The reason many developers are turning to Vue is that it addresses the issues of React and Angular.
  • But, one must not forget that Angular and React are still very big names in the JavaScript world, whereas Vue has just begun to rise.

Vue.js, an MIT-licensed open source project, is a JavaScript library for building web interfaces. The library was first released in 2013, but not many developers took cognizance of it in web framework technology for the next two years. It was 2016 wh
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react-konva now supports @reactjs v16. Now it uses new react-reconciler.

  • React Konva is a JavaScript library for drawing complex canvas graphics using React.
  • Currently you can use all components as React components and all events are supported on them in same way as normal browser events are supported.
  • It is NOT about drawing graphics, but react-konva is exactly for drawing complex graphics on element from React.
  • Konva helps here a lot (especially when you need events for objects on canvas, like โ€œclickโ€ on shape, it is really hard to do with vanilla canvas).
  • Somethings like: – – But for simple cases you can use methods: – – For images you need manually create native window.Image instance or element and use it as attribute of component.

react-konva – React + Canvas = Love. JavaScript library for drawing complex canvas graphics using React.
Continue reading “react-konva now supports @reactjs v16.
Now it uses new react-reconciler.”

Kicking off the first day of a full-week React Native training for @LexisNexisUK ๐Ÿ‘Œ๐ŸŽ‰

Kicking off the first day of a full-week  React Native training for @LexisNexisUK ๐Ÿ‘Œ๐ŸŽ‰

  • Learned a lot!
  • Good introduction to the basics of React.
  • I see it as a very good starting point for further React development.
  • Very thorough introduction to React.
  • The presentations were very straightforward, especially with the format of the slides.

Interactive React and JavaScript workshop for public training, private company training, or conference workshops. The first workshop accompanied by an interactive web app for practical exercises.
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I wish I knew these before diving into React โ€“ OpsGenie Engineering

  • By default, setState triggers a re-renderThe default behavior of React is to re-render on every state change, and most of the time it is okay to rely on this.
  • However, re-rendering unnecessarily wastes cycles which is not a good practice.Each component has a method called shouldComponentUpdate and it is called everytime you change state or pass new props from the parent component.
  • We can simply divide lifecycle into three parts:Mounting: an instance of the component is being created and inserted into the DOM.Updating: component is being re-rendered, can be caused by changes of props or state.Unmounting: component is being removed from the DOM.It is very important to understand how these methods work….
  • Compare this.props with nextProps and if there is a significant change, act on it.Two important notes here:React may call componentWillReceiveProps even if the props have not changed, so comparing this.props and nextProps is is invoked before a mounted component receives new props, this means React doesnโ€™t call componentWillReceiveProps with initial…
  • Use React Developer ToolsReact Developer Tools lets you inspect the React component hierarchy, componentsโ€™ props and state.

At OpsGenie, we had a deep dive into React for our Badges project. I learned many new things & made many mistakes. These are the things that really helped me.
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Try React (from your browser) โ€” React Armory

Try React (from your browser)  #ReactJS

  • In fact, the React app that you’re looking at only has three files:

    • index.html loads the necessary scripts.
    • main.js renders this message.
    • main.css just sets the font.

    Of course, JSX needs to be compiled.

  • It’s never been easier to try React!

Try React from the comfort of your browser. Get feedback as you type, with support for JSX, CSS and ES6 modules.
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