Introduction to ReactJS

#javascript #reactjs #webdev #womenintech

  • ReactJS focuses only on the rendering of View (part of MVC), as it does not implement the entire MVC pattern, but tightly focuses on the development of components (views) which are displayed on the user-interface so that it is more efficient in developing dynamic and interactive user-interfaces and its components….
  • Traditionally, when we used to change the data (model in MVC) at server-side, we used to reload the entire page (at client-side) to implement or reflect the updates from the server, which make processing very slow and creates bad user-experiences.
  • But ReactJS has solved these issues as it works at the client-side and takes care of the updates from the server by just changing those particular components or parts of interfaces which are changed, and it does not reload the entire page.
  • DOM (Document Object Model) is the user-interface or HTML document which is rendered or displayed on the screen, and if we have to rerender the entire DOM every time to reflect the changes that come from the server, it would be very expensive and take many CPU-cycles and processor time….
  • To overcome these issues, ReactJS creates Virtual DOMs in memory and whenever any data is changed at the server, ReactJS rewrites the Virtual DOM, and then it performs “diff” operations between all Virtual DOMs… one which was created initially and the other which is created after the change of data….

ReactJS is a JavaScript library used to develop dynamic user-interfaces or the components of user-interfaces like search bars, sliders, and widgets in web applications. ReactJS focuses only on the…
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Interview of @hrmny_ about Parket, a light state management library inspired by mobx-state-tree #mobx #reactjs

  • I am currently working as a freelance full-stack developer.
  • Parket is a state management library; a well-known example would be Redux.
  • Parket lets you create models with a state, actions, and views; these can later be used by instantiating them and can be nested inside each other.
  • As you can see here, Parket doesn’t care what your action does or instead what it is; it just listens to state changes.
  • It’s always nice to see new approach to state management.

State management is one of those topics that divides opinions. So far we’ve seen a couple of option…
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#mobx #reactjs”

How I organize my React & Redux projects – Bruno Quaresma – Medium

How I organize my React & Redux projects  #javascript #react #redux #reactjs

  • So, in order to reuse some domain logic like a Payment feature you will need to enter in every function folder and move the respective files and tests to a separeted folder to create a lib.
  • Problems solved… In parts…I think that the views(visual components/dumb components) are not part of the domain because the views are just a way to decorate some data to display to the user.
  • It’s the best part to use and reuse components.Then, I extracted the views from all domains folder and created a components folder in src directory.
  • Therefore, after some reflection, I decided to create a folder called modules and put all the logical domain inside.Another point that I think that is important to care about is the screens folder.
  • The answer to this is because the components folder is for reusable visual components(dumb components) as opposed to screens which are very coupled with the current application.The utils folder is used to keep some logic that can be extracted from the code but is not about the application domain, e.g. string/array operations.If you have a differente point of view, let me know.

In this post, I will share with you how I organize my React & Redux projects and talk about some decisions that I made while working in some projects in the last two years. This structure groups each…
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React Native Effective Patterns – The Poli – Medium

React Native Effective Patterns  #software #mobile #javascript #reactnative #react #reactjs

  • Your views and components should rely on props and callbacks.
  • The idea is simple:Screens and Views are not the same.
  • FavoritesScreen uses that callback to tell the view to navigate to another screen.
  • Keep your callbacks chained togetherEvery time one of your views exposes a callback which may be declared in another part of the app (for example, mapStateToProps), first invoke the actual callback passed on props.
  • This enables you to, for example, Navigate to a screen and also fetch some information to feed the next view.Following the previous example, if FavoritesScreen told FavoritesView to navigate to the FavoriteScreen when selecting a Favorite, Redux would honor that, but also invoke some Redux actions.As you may see, every realm knows how to handle its stuff: Screens know how to navigate, Connected Views know how to handle redux actions and Views are dumb, stateless and rely on their props.5.

I’ve been working with React Native for quite a while now, both professionally and personally, and actually enjoy it. In this article I will describe some patterns I use. Keep in mind that whatever…
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What the Flux? – Gina Yeon – Medium

What the Flux?  #flux #react #reactjs

  • It complements React’s composable view components by utilizing a unidirectional data flow.Flux has 4 major / React ComponentsThe unidirectional data flow allows Flux to shy away from the what we’re more familiar with — the MVC structure.MVC Structure and FlowWhen a user interacts with a React View, it kicks off an action through the dispatcher, to the stores that hold the data, which then updates all of the views that are affected.Flux Structure and Data FlowThe unidirectional pattern means that data flows in a single direction.
  • The action, dispatcher, store, and view are independent nodes with distinct inputs and outputs.
  • The actions are simple objects containing new data and an identifying type property.Sometimes, the views may cause a new action to be sent through the system depending on the UI.Actions are provided to the dispatcher through action creators originating from the views, through user interaction.
  • The dispatcher, acting as a central hub, will then take those actions and invoke callbacks registered by the stores and send the actions to the stores.
  • These views will listen for that change event through event handlers will call their own setState() method to then re-render themselves and all of their descendants in the component tree.Flux, with Harry PotterSeverus Snape is patrolling the halls of Hogwarts to make sure no students are out of bed.

When I first started researching Flux, it was described as an application architecture. I thought, “Great, I know architecture, this should make sense.” Little did I know, architecture in the tech…
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From React to Elm

  • From React to Elm | Sebastian's Blog
  • I have noticed that with Elm my workflow has changed substantially.

  • At some point in 2015 I heard about Elm and I was intrigued.

  • This kind of safety is everywhere in Elm.

  • The Elm compiler will pick up every single problem and offer very nice error messages to help resolve the issues.

I have been working in React full time for probably two and a half years now. I work for which is large application mostly built on React for the Front end. During this time I have enjoyed working with React very much, it is a great library for building front end applications.
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Just for Node.js & React.js Developers: A New Neo4j Movies Template – Medium

The Front-end: The front-end, in this case is built in React.js, Continue readi...  #react

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  • #ReactJS and React Native Stories for JavaScript Web Architects, Builders, Ninjas and the like.
  • If you run into problems, make sure your database is actually running and that you’ve entered your database credentials in the api/config.js file.
  • In the app, calls to the database are handled by /api/neo4j/dbUtils.js , described piece by piece below.
  • The Front-end: The front-end, in this case is built in React.js, consumes the data presented by the Express.js API and presents some views to the user, including the home page, a Movie detail page and a Person detail page.

“Just for Node.js & React.js Developers: A New Neo4j Movies Template” is published by ReactJS News
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