Thinking in React

Edit on GitHub React is, in our opinion, the premier way to build big, fast Web apps with JavaScript. It has scaled very well for us at Facebook and Instagram. One of the many great parts of React is how it makes you think about apps as you build them. In this document, we'll walk you through the thought process of building a searchable product data table using React. Start With A Mock # Imagine that we already have a JSON API and a mock from our designer. Our JSON API returns some data that looks like this: Step 1: Break The UI Into A Component Hierarchy # The first thing you'll want to do is to draw boxes around every component (and subcomponent) in the mock and give them all names. But how do you know what should be its own component? Since you're often displaying a JSON data model to a user, you'll find that if your model was built correctly, your UI (and therefore your component structure) will map nicely. You'll see here that we have five components in our simple app. And That's It # Related: tdmaithi

Thinking in Navigation Thinking in React is a featured post on Facebook's React website. Step by step, it takes you through the thought process of building a searchable product data table in React. It's a great post but the thought process is flawed. I'll explain the flaw and how you can use the Navigation router to correct it. The flaw appears in step 3 when the author identifies what data belongs in React state. To make the identification he asks three questions of each piece of data: Is it passed in from a parent via props? From these questions he concludes that the search text and the checkbox make up the React state. Is it part of the URL? The addition of that one question results in quite a different conclusion to step 3: The search text the user has entered and the value of the checkbox should appear in the URL. The author, in the subsequent two steps, identifies which component owns the data and inversely flows the data up the hierarchy to this common owner. Let's think about what we want to happen.

Lucy | How does React decide to re-render a component? React is known for it’s performance. Because it has a virtual DOM and only updates the real DOM when required it can be much faster than updating the DOM all the time, even to display the same information. However, React’s “smarts” only go so far (at the moment!), and it’s our job to know it’s expectations and limitations so we don’t accidentally hurt performance. One of the aspects we need to be aware of is how React decides when to re-render a component. 1. A re-render can only be triggered if a component’s state has changed. Component changed? In this (massively contrived) example the Todo will re-render every second, even though the render method doesn’t use unseen at all. Well, but re-rendering all the time isn’t helpful... I mean, I appreciate that React is being super careful. But re-rendering seems expensive (and your example is melodramatic) Yes, re-rendering unnecessarily does waste cycles and is generally not a good idea. How can we tell React to skip re-rendering? It can be.

Thinking in react We build a sample app in the Facebook view library, following along with their 'Thinking in React' guide Hendrik Swanepoel Hendrik lives in Cape Town, South Africa. Setting up the environment We create a new folder and cd into it terminal $ mkdir ttreact && cd $_ We install react and bootstrap with bower $ bower install react $ bower install bootstrap Now start up a little web server $ python -m SimpleHTTPServer Lastly we create a new file in this folder called index.html Step 0 of 'Thinking in React' We introduce some static HTML that we would like to work to using React index.html <! This gets us to this point: Step 1 of 'Thinking in React' - Break the UI into a component hierarchy We have a look at the UI and identify the following components: EpisodeRow EpisodeTable SearchBar FilterableEpisodeTable - contains the other components Step 2: Build a static version in React We build all the required components to render the view and bind them to some data Step 4: Identify where your state should live Wrap up

React Patterns Introduction Functional Programming in Javascript This is an interactive learning course with exercises you fill out right in the browser. If you just want to browse the content click the button below: This is a series of interactive exercises for learning Microsoft's Reactive Extensions (Rx) Library for Javascript. So why is the title "Functional Programming in Javascript"? map filter concatAll reduce zip Here's my promise to you: if you learn these 5 functions your code will become shorter, more self-descriptive, and more durable. Finishing the Interactive Exercises This isn't just a tutorial, it's a series of interactive exercises that you can fill out right in your browser! Note: Use the "F4" key to toggle full screen mode for each editor. This tutorial is on GitHub, and is asymptotically approaching completion. Your answers will be saved in local storage. Working with Arrays The Array is Javascript's only collection type. This section will follow a pattern. Traversing an Array Exercise 1: Print all the names in an array Filtering Arrays

thinking-in-react-meteor-example/product_row.cjsx at master · chemuto/thinking-in-react-meteor-example Which Front-End Framework to select for Your next web development? The last few decades has played host to a substantial increase in the number of front-end development frameworks – and rightly so. Aside from markedly improving the end user experience, the best frontend frameworks of 2018 proffer an assortment of tools to the web developer – from web apps, API integration to a robust architecture and a whole lot more. Their versatility and sheer capacity emphasize why they are so important to anyone looking to build scalable and efficient frontend applications. The issue, however, is that given the sheer number options available today, the question of choosing a JavaScript framework to work with comes into place. To this regard, we’ve gone round to summate all you need to consider to help you decide which frontend development framework fits your company best. First off, how easy is it to source for learning resources? What options do you have? Compactness and a lightweight build Community and support

Intro to Meteor with React In this tutorial, we’re going to build a Todo app using Meteor and React. We'll be taking a somewhat different approach from the official Meteor React tutorial and adding a few more bells and whistles along the way. Prerequisites Basic knowledge of HTML, JavaScript, and use of a command line terminal.A laptop with a code editor of your choice. Getting Started Each step in the tutorial has a corresponding branch in the github repo. Getting caught up using git branches. Clone the tutorial: git clone into the tutorial project: cd intro-to-meteor-reactPull down all branches: git pull --allView available branches: git branch -a Now, you should be all set to get caught up to a tutorial step if needed. Additional Reading/Resources

Le Monde Informatique : actualités, dossiers et tendances IT Building Your Second React.js App — Learning New Stuff Building Your Second React.js App Getting into more advanced features This is the second post in a series of tutorials on React.js. The first one took you through building a very simple profile page with the popular Javascript library: This time we’ll introduce some more basic concepts: StateEvent handlersComponent life cyclesReact & API’s Looking at the project You’ll build an app which searches the iTunes API based on user inputs and displays the results on the page. If we break the UI into components it’ll look something like this: The red component App is the main wrapper for all the other components. The Results component also has its own children called ResultItem (yellow). We can also visualize the component structure like this: --App-----SearchBox-----Results-------ResultItem Step 1: Download the template You’ll find the template for the app at this GitHub repo, in the index.html file. This is how it looks: Step 2: Adding State Step 3: Add Ajax Step 4: Passing the results down as props Great.