Название: React js: The Ultimate Beginner's Guide to Learn React js Programming Step by Step - 2020 Автор: Kathleen Peterson Издательство: mEm lnc Год: 2020 Страниц: 96 Язык: английский Формат: pdf, rtf, epub Размер: 10.1 MB
You may have picked up this book with some level of jаvascript knowledge. There is also a high probability that you have an idea of what React js is. This chapter highlights the key aspects of React as a framework, explains the problems it solves, and describes how you can utilize the features and the rest of the information contained in this book to better your web development practices and create complex, yet maintainable user interfaces using React.
React js is a jаvascript 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 js was actually born in Facebook’s 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.
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 levels—from those who have just been introduced to jаvascript, to seasoned veterans of the web. You will see these features—such as the virtual DOM, JSX, and Flux concepts—as you read this book and discover how they can be used to create complex user interfaces.
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
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