Search icon CANCEL
Subscription
0
Cart icon
Your Cart (0 item)
Close icon
You have no products in your basket yet
Arrow left icon
Explore Products
Best Sellers
New Releases
Books
Videos
Audiobooks
Learning Hub
Free Learning
Arrow right icon
React and React Native
React and React Native

React and React Native: Build cross-platform JavaScript apps with native power for mobile, web and desktop

eBook
€8.99 €32.99
Paperback
€41.99
Subscription
Free Trial
Renews at €18.99p/m

What do you get with Print?

Product feature icon Instant access to your digital eBook copy whilst your Print order is Shipped
Product feature icon Paperback book shipped to your preferred address
Product feature icon Download this book in EPUB and PDF formats
Product feature icon Access this title in our online reader with advanced features
Product feature icon DRM FREE - Read whenever, wherever and however you want
OR
Modal Close icon
Payment Processing...
tick Completed

Shipping Address

Billing Address

Shipping Methods
Table of content icon View table of contents Preview book icon Preview Book

React and React Native

Chapter 2. Rendering with JSX

This chapter will introduce you to JSX. We'll start by covering the basics: what is JSX? Then, you'll see that JSX has built-in support for HTML tags, as you would expect; so we'll run through a few examples here. After having looked at some JSX code, we'll discuss how it makes describing the structure of UIs easy for us. Then, we'll jump into building our own JSX elements, and using JavaScript expressions for dynamic content.

Ready?

What is JSX?

In this section, we'll implement the obligatory hello world JSX application. At this point, we're just dipping our toes into the water; more in-depth examples will follow. We'll also discuss what makes this syntax work well for declarative UI structures.

Hello JSX

Without further ado, here's your first JSX application:

// The "render()" function will render JSX markup and 
// place the resulting content into a DOM node. The "React" 
// object isn't explicitly used here, but it's used 
// by the transpiled JSX source. 
import React from 'react'; 
import { render } from 'react-dom'; 
 
// Renders the JSX markup. Notice the XML syntax 
// mixed with JavaScript? This is replaced by the 
// transpiler before it reaches the browser. 
render( 
  (<p>Hello, <strong>JSX</strong></p>), 
  document.getElementById('app') 
); 

Pretty simple, right? Let's walk through what's happening...

Just like HTML

At the end of the day, the job of a React component is to render HTML into the browser DOM. This is why JSX has support for HTML tags, out of the box. In this section, we'll look at some code that renders some of the available HTML tags. Then, we'll cover some of the conventions that are typically followed in React projects when HTML tags are used.

Built-in HTML tags

When we render JSX, element tags are referencing React components. Since it would be tedious to have to create components for HTML elements, React comes with HTML components. We can render any HTML tag in our JSX, and the output will be just as we'd expect. If you're not sure, you can always run the following code to see which HTML element tags React has:

// Prints a list of the global HTML tags 
// that React knows about. 
console.log( 
  'available tags', 
  Object.keys(React.DOM).sort() 
); 

You can see that React.DOM has all the built-in HTML elements that we need, implemented as...

Describing UI structures

JSX is the best way to describe complex UI structures. Let's look at some JSX markup that declares a more elaborate structure than a single paragraph:

import React from 'react'; 
import { render } from 'react-dom'; 
 
// This JSX markup describes some fairly-sophisticated 
// markup. Yet, it's easy to read, because it's XML and 
// XML is good for concisely-expressing hierarchical 
// structure. This is how we want to think of our UI, 
// when it needs to change, not as an individual element 
// or property. 
render(( 
  <section> 
    <header> 
      <h1>A Header</h1> 
    </header> 
    <nav> 
      <a href="item">Nav Item</a> 
    </nav> 
    <main> 
      <p>The main content...</p> 
    </main> 
    <footer> 
      <small>&copy; 2016</small> 
    </footer> 
  </section> 
  ), 
  document.getElementById(&apos...

Creating your own JSX elements

Components are the fundamental building blocks of React. In fact, components are the vocabulary of JSX markup. In this section, we'll see how to encapsulate HTML markup within a component. We'll build examples that show you how to nest custom JSX elements and how to namespace your components.

Encapsulating HTML

The reason that we want to create new JSX elements is so that we can encapsulate larger structures. This means that instead of having to type out complex markup, we just use our custom tag. The React component returns the JSX that replaces the element. Let's look at an example now:

// We also need "Component" so that we can 
// extend it and make a new JSX tag. 
import React, { Component } from 'react'; 
import { render } from 'react-dom'; 
 
// "MyComponent" extends "Component", which means that 
// we can now use it in JSX markup. 
class MyComponent extends Component { 
  render() { 
 ...

Using JavaScript expressions

As we saw in the preceding section, JSX has special syntax that lets us embed JavaScript expressions. Any time we render JSX content, expressions in the markup are evaluated. This is the dynamic aspect of JSX content, and in this section, you'll learn how to use expressions to set property values and element text content. You'll also learn how to map collections of data to JSX elements.

Dynamic property values and text

Some HTML property or text values are static, meaning that they don't change as the JSX is re-rendered. Other values, the values of properties or text, are based on data that's found elsewhere in the application. Remember, React is just the view layer. Let's look at an example so that you can get a feel for what the JavaScript expression syntax looks like in JSX markup:

import React from 'react'; 
import { render } from 'react-dom'; 
 
// These constants are passed into the JSX 
// markup using the JavaScript...

What is JSX?


In this section, we'll implement the obligatory hello world JSX application. At this point, we're just dipping our toes into the water; more in-depth examples will follow. We'll also discuss what makes this syntax work well for declarative UI structures.

Hello JSX

Without further ado, here's your first JSX application:

// The "render()" function will render JSX markup and 
// place the resulting content into a DOM node. The "React" 
// object isn't explicitly used here, but it's used 
// by the transpiled JSX source. 
import React from 'react'; 
import { render } from 'react-dom'; 
 
// Renders the JSX markup. Notice the XML syntax 
// mixed with JavaScript? This is replaced by the 
// transpiler before it reaches the browser. 
render( 
  (<p>Hello, <strong>JSX</strong></p>), 
  document.getElementById('app') 
); 

Pretty simple, right? Let's walk through what's happening here. First, we...

Left arrow icon Right arrow icon
Download code icon Download Code

Key benefits

  • • Build React and React Native applications using familiar component concepts
  • • Dive deep into each platform, from routing in React to creating native mobile applications that can run offline
  • • Use Facebook’s Relay, React and GraphQL technologies, to create a unified architecture that powers both web and native applications

Description

para 1: Dive into the world of React and create powerful applications with responsive and streamlined UIs! With React best practices for both Android and iOS, this book demonstrates React and React Native in action, helping you to create intuitive and engaging applications. Para 2: React and React Native allow you to build desktop, mobile and native applications for all major platforms. Combined with Flux and Relay, you?ll be able to create powerful and feature-complete applications from just one code base. Para 3: Discover how to build desktop and mobile applications using Facebook?s innovative UI libraries. You?ll also learn how to craft composable UIs using React, and then apply these concepts to building Native UIs using React Native. Finally, find out how you can create React applications which run on all major platforms, and leverage Relay for feature-complete and data-driven applications. Para 4: What?s Inside ? Craft composable UIs using React & build Native UIs using React Native ? Create React applications for major platforms ? Access APIs ? Leverage Relay for data-driven web & native mobile applications

Who is this book for?

Perfect for anyone who wants to create mobile and desktop applications (including native mobile apps), React and React Native features step-by-step instructions and examples designed for all levels of React and React Native developers and students.
Estimated delivery fee Deliver to Malta

Premium delivery 7 - 10 business days

€32.95
(Includes tracking information)

Product Details

Country selected
Publication date, Length, Edition, Language, ISBN-13
Publication date : Mar 08, 2017
Length: 500 pages
Edition : 1st
Language : English
ISBN-13 : 9781786465658
Category :
Languages :
Tools :

What do you get with Print?

Product feature icon Instant access to your digital eBook copy whilst your Print order is Shipped
Product feature icon Paperback book shipped to your preferred address
Product feature icon Download this book in EPUB and PDF formats
Product feature icon Access this title in our online reader with advanced features
Product feature icon DRM FREE - Read whenever, wherever and however you want
OR
Modal Close icon
Payment Processing...
tick Completed

Shipping Address

Billing Address

Shipping Methods
Estimated delivery fee Deliver to Malta

Premium delivery 7 - 10 business days

€32.95
(Includes tracking information)

Product Details

Publication date : Mar 08, 2017
Length: 500 pages
Edition : 1st
Language : English
ISBN-13 : 9781786465658
Category :
Languages :
Tools :

Packt Subscriptions

See our plans and pricing
Modal Close icon
€18.99 billed monthly
Feature tick icon Unlimited access to Packt's library of 7,000+ practical books and videos
Feature tick icon Constantly refreshed with 50+ new titles a month
Feature tick icon Exclusive Early access to books as they're written
Feature tick icon Solve problems while you work with advanced search and reference features
Feature tick icon Offline reading on the mobile app
Feature tick icon Simple pricing, no contract
€189.99 billed annually
Feature tick icon Unlimited access to Packt's library of 7,000+ practical books and videos
Feature tick icon Constantly refreshed with 50+ new titles a month
Feature tick icon Exclusive Early access to books as they're written
Feature tick icon Solve problems while you work with advanced search and reference features
Feature tick icon Offline reading on the mobile app
Feature tick icon Choose a DRM-free eBook or Video every month to keep
Feature tick icon PLUS own as many other DRM-free eBooks or Videos as you like for just €5 each
Feature tick icon Exclusive print discounts
€264.99 billed in 18 months
Feature tick icon Unlimited access to Packt's library of 7,000+ practical books and videos
Feature tick icon Constantly refreshed with 50+ new titles a month
Feature tick icon Exclusive Early access to books as they're written
Feature tick icon Solve problems while you work with advanced search and reference features
Feature tick icon Offline reading on the mobile app
Feature tick icon Choose a DRM-free eBook or Video every month to keep
Feature tick icon PLUS own as many other DRM-free eBooks or Videos as you like for just €5 each
Feature tick icon Exclusive print discounts

Frequently bought together


Stars icon
Total 115.97
Mastering React Native
€36.99
React and React Native
€41.99
React Design Patterns and Best Practices
€36.99
Total 115.97 Stars icon
Banner background image

Table of Contents

26 Chapters
1. Why React? Chevron down icon Chevron up icon
2. Rendering with JSX Chevron down icon Chevron up icon
3. Understanding Properties and State Chevron down icon Chevron up icon
4. Event Handling – The React Way Chevron down icon Chevron up icon
5. Crafting Reusable Components Chevron down icon Chevron up icon
6. The React Component Lifecycle Chevron down icon Chevron up icon
7. Validating Component Properties Chevron down icon Chevron up icon
8. Extending Components Chevron down icon Chevron up icon
9. Handling Navigation with Routes Chevron down icon Chevron up icon
10. Server-Side React Components Chevron down icon Chevron up icon
11. Mobile-First React Components Chevron down icon Chevron up icon
12. Why React Native? Chevron down icon Chevron up icon
13. Kickstarting React Native Projects Chevron down icon Chevron up icon
14. Building Responsive Layouts with Flexbox Chevron down icon Chevron up icon
15. Navigating Between Screens Chevron down icon Chevron up icon
16. Rendering Item Lists Chevron down icon Chevron up icon
17. Showing Progress Chevron down icon Chevron up icon
18. Geolocation and Maps Chevron down icon Chevron up icon
19. Collecting User Input Chevron down icon Chevron up icon
20. Alerts, Notifications, and Confirmation Chevron down icon Chevron up icon
21. Responding to User Gestures Chevron down icon Chevron up icon
22. Controlling Image Display Chevron down icon Chevron up icon
23. Going Offline Chevron down icon Chevron up icon
24. Handling Application State Chevron down icon Chevron up icon
25. Why Relay and GraphQL? Chevron down icon Chevron up icon
26. Building a Relay React App Chevron down icon Chevron up icon

Customer reviews

Rating distribution
Full star icon Full star icon Full star icon Full star icon Empty star icon 4
(1 Ratings)
5 star 0%
4 star 100%
3 star 0%
2 star 0%
1 star 0%
Caleb Nov 06, 2017
Full star icon Full star icon Full star icon Full star icon Empty star icon 4
Content is really good, but all pages are black and gray. So, it is hard to see well when you read, I personally recommend reader with color pictures which provided by them. Actually, when I read this book, I had an intermediate level of React Native, also I finished React Native lectures on Udemy, but this is really focused on how it works, and more detail information comparing the Udemy lectures. So, it would be great if you want to know more and use a reference book. However, React Native is changing quickly, and it can be so out-dated easily, but I think it includes the most recent things about React Native. If this book published in color, it would be great to me...haha..
Amazon Verified review Amazon
Get free access to Packt library with over 7500+ books and video courses for 7 days!
Start Free Trial

FAQs

What is the delivery time and cost of print book? Chevron down icon Chevron up icon

Shipping Details

USA:

'

Economy: Delivery to most addresses in the US within 10-15 business days

Premium: Trackable Delivery to most addresses in the US within 3-8 business days

UK:

Economy: Delivery to most addresses in the U.K. within 7-9 business days.
Shipments are not trackable

Premium: Trackable delivery to most addresses in the U.K. within 3-4 business days!
Add one extra business day for deliveries to Northern Ireland and Scottish Highlands and islands

EU:

Premium: Trackable delivery to most EU destinations within 4-9 business days.

Australia:

Economy: Can deliver to P. O. Boxes and private residences.
Trackable service with delivery to addresses in Australia only.
Delivery time ranges from 7-9 business days for VIC and 8-10 business days for Interstate metro
Delivery time is up to 15 business days for remote areas of WA, NT & QLD.

Premium: Delivery to addresses in Australia only
Trackable delivery to most P. O. Boxes and private residences in Australia within 4-5 days based on the distance to a destination following dispatch.

India:

Premium: Delivery to most Indian addresses within 5-6 business days

Rest of the World:

Premium: Countries in the American continent: Trackable delivery to most countries within 4-7 business days

Asia:

Premium: Delivery to most Asian addresses within 5-9 business days

Disclaimer:
All orders received before 5 PM U.K time would start printing from the next business day. So the estimated delivery times start from the next day as well. Orders received after 5 PM U.K time (in our internal systems) on a business day or anytime on the weekend will begin printing the second to next business day. For example, an order placed at 11 AM today will begin printing tomorrow, whereas an order placed at 9 PM tonight will begin printing the day after tomorrow.


Unfortunately, due to several restrictions, we are unable to ship to the following countries:

  1. Afghanistan
  2. American Samoa
  3. Belarus
  4. Brunei Darussalam
  5. Central African Republic
  6. The Democratic Republic of Congo
  7. Eritrea
  8. Guinea-bissau
  9. Iran
  10. Lebanon
  11. Libiya Arab Jamahriya
  12. Somalia
  13. Sudan
  14. Russian Federation
  15. Syrian Arab Republic
  16. Ukraine
  17. Venezuela
What is custom duty/charge? Chevron down icon Chevron up icon

Customs duty are charges levied on goods when they cross international borders. It is a tax that is imposed on imported goods. These duties are charged by special authorities and bodies created by local governments and are meant to protect local industries, economies, and businesses.

Do I have to pay customs charges for the print book order? Chevron down icon Chevron up icon

The orders shipped to the countries that are listed under EU27 will not bear custom charges. They are paid by Packt as part of the order.

List of EU27 countries: www.gov.uk/eu-eea:

A custom duty or localized taxes may be applicable on the shipment and would be charged by the recipient country outside of the EU27 which should be paid by the customer and these duties are not included in the shipping charges been charged on the order.

How do I know my custom duty charges? Chevron down icon Chevron up icon

The amount of duty payable varies greatly depending on the imported goods, the country of origin and several other factors like the total invoice amount or dimensions like weight, and other such criteria applicable in your country.

For example:

  • If you live in Mexico, and the declared value of your ordered items is over $ 50, for you to receive a package, you will have to pay additional import tax of 19% which will be $ 9.50 to the courier service.
  • Whereas if you live in Turkey, and the declared value of your ordered items is over € 22, for you to receive a package, you will have to pay additional import tax of 18% which will be € 3.96 to the courier service.
How can I cancel my order? Chevron down icon Chevron up icon

Cancellation Policy for Published Printed Books:

You can cancel any order within 1 hour of placing the order. Simply contact customercare@packt.com with your order details or payment transaction id. If your order has already started the shipment process, we will do our best to stop it. However, if it is already on the way to you then when you receive it, you can contact us at customercare@packt.com using the returns and refund process.

Please understand that Packt Publishing cannot provide refunds or cancel any order except for the cases described in our Return Policy (i.e. Packt Publishing agrees to replace your printed book because it arrives damaged or material defect in book), Packt Publishing will not accept returns.

What is your returns and refunds policy? Chevron down icon Chevron up icon

Return Policy:

We want you to be happy with your purchase from Packtpub.com. We will not hassle you with returning print books to us. If the print book you receive from us is incorrect, damaged, doesn't work or is unacceptably late, please contact Customer Relations Team on customercare@packt.com with the order number and issue details as explained below:

  1. If you ordered (eBook, Video or Print Book) incorrectly or accidentally, please contact Customer Relations Team on customercare@packt.com within one hour of placing the order and we will replace/refund you the item cost.
  2. Sadly, if your eBook or Video file is faulty or a fault occurs during the eBook or Video being made available to you, i.e. during download then you should contact Customer Relations Team within 14 days of purchase on customercare@packt.com who will be able to resolve this issue for you.
  3. You will have a choice of replacement or refund of the problem items.(damaged, defective or incorrect)
  4. Once Customer Care Team confirms that you will be refunded, you should receive the refund within 10 to 12 working days.
  5. If you are only requesting a refund of one book from a multiple order, then we will refund you the appropriate single item.
  6. Where the items were shipped under a free shipping offer, there will be no shipping costs to refund.

On the off chance your printed book arrives damaged, with book material defect, contact our Customer Relation Team on customercare@packt.com within 14 days of receipt of the book with appropriate evidence of damage and we will work with you to secure a replacement copy, if necessary. Please note that each printed book you order from us is individually made by Packt's professional book-printing partner which is on a print-on-demand basis.

What tax is charged? Chevron down icon Chevron up icon

Currently, no tax is charged on the purchase of any print book (subject to change based on the laws and regulations). A localized VAT fee is charged only to our European and UK customers on eBooks, Video and subscriptions that they buy. GST is charged to Indian customers for eBooks and video purchases.

What payment methods can I use? Chevron down icon Chevron up icon

You can pay with the following card types:

  1. Visa Debit
  2. Visa Credit
  3. MasterCard
  4. PayPal
What is the delivery time and cost of print books? Chevron down icon Chevron up icon

Shipping Details

USA:

'

Economy: Delivery to most addresses in the US within 10-15 business days

Premium: Trackable Delivery to most addresses in the US within 3-8 business days

UK:

Economy: Delivery to most addresses in the U.K. within 7-9 business days.
Shipments are not trackable

Premium: Trackable delivery to most addresses in the U.K. within 3-4 business days!
Add one extra business day for deliveries to Northern Ireland and Scottish Highlands and islands

EU:

Premium: Trackable delivery to most EU destinations within 4-9 business days.

Australia:

Economy: Can deliver to P. O. Boxes and private residences.
Trackable service with delivery to addresses in Australia only.
Delivery time ranges from 7-9 business days for VIC and 8-10 business days for Interstate metro
Delivery time is up to 15 business days for remote areas of WA, NT & QLD.

Premium: Delivery to addresses in Australia only
Trackable delivery to most P. O. Boxes and private residences in Australia within 4-5 days based on the distance to a destination following dispatch.

India:

Premium: Delivery to most Indian addresses within 5-6 business days

Rest of the World:

Premium: Countries in the American continent: Trackable delivery to most countries within 4-7 business days

Asia:

Premium: Delivery to most Asian addresses within 5-9 business days

Disclaimer:
All orders received before 5 PM U.K time would start printing from the next business day. So the estimated delivery times start from the next day as well. Orders received after 5 PM U.K time (in our internal systems) on a business day or anytime on the weekend will begin printing the second to next business day. For example, an order placed at 11 AM today will begin printing tomorrow, whereas an order placed at 9 PM tonight will begin printing the day after tomorrow.


Unfortunately, due to several restrictions, we are unable to ship to the following countries:

  1. Afghanistan
  2. American Samoa
  3. Belarus
  4. Brunei Darussalam
  5. Central African Republic
  6. The Democratic Republic of Congo
  7. Eritrea
  8. Guinea-bissau
  9. Iran
  10. Lebanon
  11. Libiya Arab Jamahriya
  12. Somalia
  13. Sudan
  14. Russian Federation
  15. Syrian Arab Republic
  16. Ukraine
  17. Venezuela