Peterson - React js: The Ultimate Beginners Guide to Learn React js Programming Step by Step - 2020

React js The Ultimate Beginner's Guide to Learn React js Programming Step by Step 2020 Kathleen Peterson nd Edition " Programming isn't about what you know; it's about what you can figure out . - Chris Pine React is a JavaScript framework. React was originally created by engineers at Facebook to solve the challenges involved when developing complex user interfaces with datasets that change over time. This is not a trivial undertaking and must not only be maintainable, but also scalable to work at the scale of Facebook. React was actually born in Facebooks ads organization, where they had been utilizing a traditional client-side Model-View-Controller approach. Applications such as these normally consist of two-way data binding along with rendering template.

React changed the way that these applications were created by making some daring advances in web development. When React was released in 2013, the web development community was both interested and seemingly disgusted by what React was doing. As you will discover throughout this book, React challenges conventions that have become the de-facto standards for JavaScript framework best practices. React does this by introducing many new paradigms and shifting the status quo of what it takes to create scalable and maintainable JavaScript applications and user interfaces. Along with the shift in front-end development mentality, React comes with a rich set of features that make composing a single-page application or user interface approachable for developers of many skill levelsfrom those who have just been introduced to JavaScript, to seasoned veterans of the web. You will see these featuressuch as the virtual DOM, JSX, and Flux conceptsas you read this book and discover how they can be used to create complex user interfaces.

You will also see, in brief, how Facebook is continually challenging the development world with React Native. React Native is a new open source library for creating native user interfaces utilizing the same principles as Reacts JavaScript library. By creating a Native UI library, React has pushed its value proposition of learn once, write anywhere. This paradigm shift applies to being able to utilize the core concepts of React in order to make maintainable interfaces. By now it is possible you are thinking that there is nothing React cant do when it comes to development. This is not the case, and in order to further understand what React is, you need an understanding of what React is not, which you learn later in this chapter.

First, you will understand the underlying problems that caused React to be created and how React solves those problems. . Memlnc.com INTRODUCTION ________________________________11 WHAT IS REACT?................................................................11 VIRTUAL DOM PERFORMANCE..........................................13 TERMINOLOGY IN REACT...................................................15 SINGLE-PAGE APP...............................................................15 BANKS.................................................................................16 BUNDLERS...........................................................................17 PACKAGE MANAGER...........................................................17 CONTENT DISTRIBUTION NETWORK...................................17 ELEMENTS...........................................................................18 THE INGREDIENTS................................................................19 CHARACTERISTICS................................................................20 PROPS.CHILDREN.................................................................21 CASE.....................................................................................22 LIFE CYCLE DEPENDENCIES..................................................23 ADJUSTED AND UNCONFIGURED COMPONENTS...............24 KEYS.....................................................................................24 REFERENCES .................................................................25 EVENTS.................................................................................26 MATCHING...........................................................................26 REACTJS - OVERVIEW...........................................................28 REACT PROPERTIES..................................................................29 ADVANTAGES OF THE REACT...................................................30 REACT LIMITS...........................................................................30 INSTALL REACTJS USING WEBPACK AND BABEL......................31 STEP 1: CREATE THE ROOT FOLDER.........................................31 STEP 2 - INSTALL REACT AND REACT DOM..............................33 STEP 3 - INSTALL THE WEB PACKAGE......................................34 STEP 4 - INSTALL BABYLON...................................,,,,,..............35 STEP 5 - CREATE FILES.............................................,,.........36 STEP 6 - ASSIGN A TRANSLATOR, SERVER, AND LOADER...36 STEP 7 - INDEX.HTML...............................................................39 STEP 8: APP.JSX AND MAIN.JS.................................................40 STEP 9: RUN THE SERVER........................................................42 STEP 10 - CREATE THE PACKAGE.............................................43 USE THE CREATE-RESPONSE-APP COMMAND........................44 STEP 1.....................................................................................45 STEP 2.....................................................................................45 STEP 3.....................................................................................46 STEP 4.....................................................................................46 REACTJS - JSX_____________________________________47 USING JSX...............................................................................48 NESTED ELEMENTS................................................................49 FEATURES................................................................................51 JAVASCRIPT EXPRESSIONS......................................................52 ELEGANCE REACT......................................................................54 COMMENTS...............................................................................56 CHAPTER II_________________________________________58 REACTJS - COMPONENTS...........................................................58 AN EXAMPLE WITH THE CASE....................................................60 CHAPTER III_________________________________________65 REACTJS - VALIDATE EXTENSIONS...............................................65 CHECK THE ACCESSORIES............................................................66 CHAPTER IV_________________________________________71 COMPONENT API........................................................................71 SET THE STATUS..........................................................................71 FORCE UPDATE...........................................................................74 LOOK FOR THE DOM NODE.........................................................75 CHAPTER V ________________________________________78 COMPONENT LIFE CYCLE...........................................................78 LIFE CYCLE METHODS................................................................78 CONVERTS THE FUNCTION TO A CLASS.....................................86 ADD LIFE CYCLE DEPENDENCIES TO THE CLASS.........................92 USE THE CASE CORRECTLY.........................................................99 REACT INCORPORATES STATUS UPDATES...............................101 DATA FLOWS TO LOWER LEVELS.............................................103 CONDITIONAL RENDERING IN REACT.....................................106 ITEM VARIABLES _____________________________________109 CLAUSE IF INLINE WITH LOGICAL OPERATOR &&.......................112 IN-LINE IF-ELSE CLAUSE WITH CONDITIONAL OPERAND....114 PREVENT COMPONENT FROM RENDERING.................................116 CHAPTER VI __________________________________________119 FORMS...........................................................................................119 EXAMPLE.......................................................................................122 CHAPTER VII..................................................................................126 FIELDS IN REACT............................................................................126 CONTROL INGREDIENTS.................................................................127 THE TEXTAREA ELEMENT...............................................................131 SELECT............................................................................................134 FILE INPUT ELEMENT......................................................................137 HANDLING MULTIPLE ENTRIES.......................................................137 JUSTIFIED ENTRIES WITH NULL VALUE...........................................141 ALTERNATIVES TO CONTROLLED INGREDIENTS.............................142