Michio JP

Michio JP

1565938989

Design Patterns with React Easy State

Originally published by Bertalan Miklos at medium.com

1.    Always wrap your components with view().

2.  Always wrap you state stores with store().

import React from 'react'
import { store, view } from 'react-easy-state'

const counter = store({
num: 0,
incr: () => counter.num++
})

export default view(() =>
<button onClick={counter.incr}>{counter.num}</button>
)

This is enough for it to automatically update your views when needed. It doesn’t matter how you structure or mutate your state stores, any syntactically valid code works.

Don’t worry if you are not familiar with Easy State yet, you already know enough to go on. Alternatively, you can check it out here.

State management and beers

Easy State doesn’t care about how you manage your state, it looks out for any kind of state mutations and updates the view when needed. This article is about state management patterns though. Patterns that are beautifully simple, but overshadowed by a myriad of opinionated libraries.

The next sections explore these patterns through a small app, which finds matching beers for your meal. I recommend you to try it out before you continue reading.


Codesandbox may be slow on mobile, don’t worry if it takes some time. Just come back here a bit later or try the live app here.

Sharing global state between components

React’s state and setState is often enough for managing local state, but big projects tend to need more. Some information is better saved globally.

JavaScript objects are singletons and they can be shared between files with ES6 import and export. This makes them a perfect candidate for storing global state.

import { store } from ‘react-easy-state’

const appStore = store({
beers: [],
fetchBeers (filter) {
appStore.isLoading = true
appStore.beers = [{ name: ‘Awesome Beer’ }]
appStore.isLoading = false
}
})

export default appStore

Notice how the fetchBeers method uses appStore.beers instead of this.beers. It is a neat trick, which makes object methods safe to be passed as callbacks.

Don’t worry about the dummy fetchBeers method yet, we will smarten it up later. The appStore can be imported and used in any file — like the below NavBar component.

import React from ‘react’
import { view } from ‘react-easy-state’
import SearchBar from ‘material-ui-search-bar’
import { LinearProgress } from ‘material-ui/Progress’
import appStore from ‘./appStore’

export default view(() =>
<div className=‘searchbar’>
<SearchBar onRequestSearch={appStore.fetchBeers} placeholder=‘Some food …’/>
{appStore.isLoading && <LinearProgress/>}
</div>
)

We need another component to display the fetched beers. Naturally it also has to import the global appStore to map a view to its beers array.

import React from ‘react’
import { view } from ‘react-easy-state’
import appStore from ‘./appStore’
import Beer from ‘./Beer’

export default view(() =>
<div className=‘beerlist’>
{!appStore.beers.length
? <h3>No matching beers found!</h3>
: appStore.beers.map(beer => <Beer key={beer.name} {…beer }/>)
}
</div>
)

Easy State re-renders the above NavBar and BeerList components when appStore.isLoading or appStore.beers changes.

Async actions

Let’s breathe life into the fetchBeers method. There is not much to change: it should be turned into an async method and it should fetch the beers from an API, instead of faking them.

import { store } from ‘react-easy-state’
import * as api from ‘./api’

const appStore = store({
beers: [],
async fetchBeers (filter) {
appStore.isLoading = true
appStore.beers = await api.fetchBeers(filter)
appStore.isLoading = false
}
})

export default appStore

An ideal store is only responsible of state manipulation and nothing else. Abstracting away the view related logic in the components and the networking logic in an API layer is a good practice. This could mean destructuring events in the components’ event handlers and handling authentication and headers in a separate API layer.

Our API is a simple one. It has a single function, which fetches matching beers for a passed food .

import axios from ‘axios’

const api = axios.create({
baseURL: ‘https://api.punkapi.com/v2
})

export async function fetchBeers (filter) {
const { data } = await api.get(‘/beers’, {
params: { food: filter }
})
return data
}

This example uses the Punk API to find beers. Check it out if you need some free data for your coding demos.

Encapsulating local state

Global state is crucial for big applications, but local state can be just as handy: it improves project structure and reusability. It is your responsibility to decide when to use which.

We are still missing a Beer component, which could use some local state to switch between a picture and a description view. Putting a state store object on the component as a property is a simple way of implementing this.

import React, { Component } from ‘react’
import { view, store } from ‘react-easy-state’
import Card, { CardContent, CardMedia } from ‘material-ui/Card’

class Beer extends Component {
store = store({ details: false })

toggleDetails = () => this.store.details = !this.store.details

render () {
const { name, image_url, food_pairing, description } = this.props
const { details } = this.store

return (
  &lt;Card onClick={this.toggleDetails} className='beer'&gt;
    {!details &amp;&amp; &lt;CardMedia image={image_url} className='media'/&gt;}
    &lt;CardContent&gt;
      &lt;h3&gt;{name}&lt;/h3&gt;
      {details
        ? &lt;p&gt;{description}&lt;/p&gt;
        : &lt;ul&gt;
            {food_pairing.map(food =&gt; &lt;li key={food}&gt;{food}&lt;/li&gt;)}
          &lt;/ul&gt;
        }
    &lt;/CardContent&gt;
  &lt;/Card&gt;
)

}
}

export default view(Beer)

Easy State re-renders the Beer component whenever store.details changes. It doesn’t matter if it is a local store or a shared global one, you can even mix the two in a single component.

The details flag toggles between the two views of the beer card. It could also be stored on the beer object itself, but putting it in an isolated local store is a cleaner approach. It stores view related metadata, which should not pollute the real data.

Conclusion

Npm is packed with amazing tools, which simplify front-end development by a huge amount. Never hesitate to use them when you need them, but always think before you install. Sometimes you can be more productive with less tools.

Some of you wouldn’t even call the above snippets patterns. They are just code examples, that most developers are familiar with. Still, they were more than enough for a creating small app.

Originally published by Bertalan Miklos at medium.com

=======================================================

Thanks for reading :heart: If you liked this post, share it with all of your programming buddies! Follow me on Facebook | Twitter

Learn More

☞ Understanding TypeScript

☞ Typescript Masterclass & FREE E-Book

☞ React - The Complete Guide (incl Hooks, React Router, Redux)

☞ Modern React with Redux [2019 Update]

☞ The Complete React Developer Course (w/ Hooks and Redux)

☞ React JS Web Development - The Essentials Bootcamp

☞ React JS, Angular & Vue JS - Quickstart & Comparison

☞ The Complete React Js & Redux Course - Build Modern Web Apps

☞ React JS and Redux Bootcamp - Master React Web Development

#reactjs #javascript #web-development

What is GEEK

Buddha Community

Design Patterns with React Easy State
Autumn  Blick

Autumn Blick

1598839687

How native is React Native? | React Native vs Native App Development

If you are undertaking a mobile app development for your start-up or enterprise, you are likely wondering whether to use React Native. As a popular development framework, React Native helps you to develop near-native mobile apps. However, you are probably also wondering how close you can get to a native app by using React Native. How native is React Native?

In the article, we discuss the similarities between native mobile development and development using React Native. We also touch upon where they differ and how to bridge the gaps. Read on.

A brief introduction to React Native

Let’s briefly set the context first. We will briefly touch upon what React Native is and how it differs from earlier hybrid frameworks.

React Native is a popular JavaScript framework that Facebook has created. You can use this open-source framework to code natively rendering Android and iOS mobile apps. You can use it to develop web apps too.

Facebook has developed React Native based on React, its JavaScript library. The first release of React Native came in March 2015. At the time of writing this article, the latest stable release of React Native is 0.62.0, and it was released in March 2020.

Although relatively new, React Native has acquired a high degree of popularity. The “Stack Overflow Developer Survey 2019” report identifies it as the 8th most loved framework. Facebook, Walmart, and Bloomberg are some of the top companies that use React Native.

The popularity of React Native comes from its advantages. Some of its advantages are as follows:

  • Performance: It delivers optimal performance.
  • Cross-platform development: You can develop both Android and iOS apps with it. The reuse of code expedites development and reduces costs.
  • UI design: React Native enables you to design simple and responsive UI for your mobile app.
  • 3rd party plugins: This framework supports 3rd party plugins.
  • Developer community: A vibrant community of developers support React Native.

Why React Native is fundamentally different from earlier hybrid frameworks

Are you wondering whether React Native is just another of those hybrid frameworks like Ionic or Cordova? It’s not! React Native is fundamentally different from these earlier hybrid frameworks.

React Native is very close to native. Consider the following aspects as described on the React Native website:

  • Access to many native platforms features: The primitives of React Native render to native platform UI. This means that your React Native app will use many native platform APIs as native apps would do.
  • Near-native user experience: React Native provides several native components, and these are platform agnostic.
  • The ease of accessing native APIs: React Native uses a declarative UI paradigm. This enables React Native to interact easily with native platform APIs since React Native wraps existing native code.

Due to these factors, React Native offers many more advantages compared to those earlier hybrid frameworks. We now review them.

#android app #frontend #ios app #mobile app development #benefits of react native #is react native good for mobile app development #native vs #pros and cons of react native #react mobile development #react native development #react native experience #react native framework #react native ios vs android #react native pros and cons #react native vs android #react native vs native #react native vs native performance #react vs native #why react native #why use react native

Samanta  Moore

Samanta Moore

1623835440

Builder Design Pattern

What is Builder Design Pattern ? Why we should care about it ?

Starting from **Creational Design Pattern, **so wikipedia says “creational design pattern are design pattern that deals with object creation mechanism, trying to create objects in manner that is suitable to the situation”.

The basic form of object creations could result in design problems and result in complex design problems, so to overcome this problem Creational Design Pattern somehow allows you to create the object.

Builder is one of the** Creational Design Pattern**.

When to consider the Builder Design Pattern ?

Builder is useful when you need to do lot of things to build an Object. Let’s imagine DOM (Document Object Model), so if we need to create the DOM, We could have to do lot of things, appending plenty of nodes and attaching attributes to them. We could also imagine about the huge XML Object creation where we will have to do lot of work to create the Object. A Factory is used basically when we could create the entire object in one shot.

As **Joshua Bloch (**He led the Design of the many library Java Collections Framework and many more) – “Builder Pattern is good choice when designing the class whose constructor or static factories would have more than handful of parameters

#java #builder #builder pattern #creational design pattern #design pattern #factory pattern #java design pattern

Joseph  Murray

Joseph Murray

1624442940

Prototype Design Pattern - Java

Prototype design pattern tutorial

Definition of Prototype pattern

The prototype pattern is a creational design pattern in software development. It is used when the type of objects to create is determined by a prototypical instance, which is cloned to produce new objects.

Where to use the Prototype pattern

If the cost for creating a new object is expensive and costs resources.

#java #design-patterns #code #tutorial #prototype-design-pattern #design pattern

Landscapes Website Design | Nature Landscapes Website Designer

Most landscapers think of their website as an online brochure. In reality of consumers have admitted to judging a company’s credibility based on their web design, making your website a virtual sales rep capable of generating massive amounts of leads and sales. If your website isn’t actively increasing leads and new landscaping contracts, it may be time for a redesign.

DataIT Solutions specializes in landscape website designing that are not only beautiful but also rank well in search engine results and convert your visitors into customers. We’ve specialized in the landscaping industry for over 10 years, and we look at your business from an owner’s perspective.

Why use our Landscapes for your landscape design?

  • Superior experience
  • Friendly personal service
  • Choice of design layout
  • Budget sensitive designs
  • Impartial product choice and advice
  • Planting and lighting designs

Want to talk about your website?
If you are a gardener or have a gardening company please do not hesitate to contact us for a quote.
Need help with your website?
Get in touch

#nature landscapes website design #landscapes website design #website design #website designing #website designer #designer

Mathew Rini

1615544450

How to Select and Hire the Best React JS and React Native Developers?

Since March 2020 reached 556 million monthly downloads have increased, It shows that React JS has been steadily growing. React.js also provides a desirable amount of pliancy and efficiency for developing innovative solutions with interactive user interfaces. It’s no surprise that an increasing number of businesses are adopting this technology. How do you select and recruit React.js developers who will propel your project forward? How much does a React developer make? We’ll bring you here all the details you need.

What is React.js?

Facebook built and maintains React.js, an open-source JavaScript library for designing development tools. React.js is used to create single-page applications (SPAs) that can be used in conjunction with React Native to develop native cross-platform apps.

React vs React Native

  • React Native is a platform that uses a collection of mobile-specific components provided by the React kit, while React.js is a JavaScript-based library.
  • React.js and React Native have similar syntax and workflows, but their implementation is quite different.
  • React Native is designed to create native mobile apps that are distinct from those created in Objective-C or Java. React, on the other hand, can be used to develop web apps, hybrid and mobile & desktop applications.
  • React Native, in essence, takes the same conceptual UI cornerstones as standard iOS and Android apps and assembles them using React.js syntax to create a rich mobile experience.

What is the Average React Developer Salary?

In the United States, the average React developer salary is $94,205 a year, or $30-$48 per hour, This is one of the highest among JavaScript developers. The starting salary for junior React.js developers is $60,510 per year, rising to $112,480 for senior roles.

* React.js Developer Salary by Country

  • United States- $120,000
  • Canada - $110,000
  • United Kingdom - $71,820
  • The Netherlands $49,095
  • Spain - $35,423.00
  • France - $44,284
  • Ukraine - $28,990
  • India - $9,843
  • Sweden - $55,173
  • Singapore - $43,801

In context of software developer wage rates, the United States continues to lead. In high-tech cities like San Francisco and New York, average React developer salaries will hit $98K and $114per year, overall.

However, the need for React.js and React Native developer is outpacing local labour markets. As a result, many businesses have difficulty locating and recruiting them locally.

It’s no surprise that for US and European companies looking for professional and budget engineers, offshore regions like India are becoming especially interesting. This area has a large number of app development companies, a good rate with quality, and a good pool of React.js front-end developers.

As per Linkedin, the country’s IT industry employs over a million React specialists. Furthermore, for the same or less money than hiring a React.js programmer locally, you may recruit someone with much expertise and a broader technical stack.

How to Hire React.js Developers?

  • Conduct thorough candidate research, including portfolios and areas of expertise.
  • Before you sit down with your interviewing panel, do some homework.
  • Examine the final outcome and hire the ideal candidate.

Why is React.js Popular?

React is a very strong framework. React.js makes use of a powerful synchronization method known as Virtual DOM, which compares the current page architecture to the expected page architecture and updates the appropriate components as long as the user input.

React is scalable. it utilises a single language, For server-client side, and mobile platform.

React is steady.React.js is completely adaptable, which means it seldom, if ever, updates the user interface. This enables legacy projects to be updated to the most new edition of React.js without having to change the codebase or make a few small changes.

React is adaptable. It can be conveniently paired with various state administrators (e.g., Redux, Flux, Alt or Reflux) and can be used to implement a number of architectural patterns.

Is there a market for React.js programmers?
The need for React.js developers is rising at an unparalleled rate. React.js is currently used by over one million websites around the world. React is used by Fortune 400+ businesses and popular companies such as Facebook, Twitter, Glassdoor and Cloudflare.

Final thoughts:

As you’ve seen, locating and Hire React js Developer and Hire React Native developer is a difficult challenge. You will have less challenges selecting the correct fit for your projects if you identify growing offshore locations (e.g. India) and take into consideration the details above.

If you want to make this process easier, You can visit our website for more, or else to write a email, we’ll help you to finding top rated React.js and React Native developers easier and with strives to create this operation

#hire-react-js-developer #hire-react-native-developer #react #react-native #react-js #hire-react-js-programmer