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E-raamat: Joy of JavaScript

4.52/5 (53 hinnangut Goodreads-ist)

Luis Atencio

Formaat: 360 pages
Ilmumisaeg: 10-Feb-2021
Kirjastus: Manning Publications
Keel: eng
ISBN-13: 9781638350323

Teised raamatud teemal:

Web programming

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Formaat: 360 pages
Ilmumisaeg: 10-Feb-2021
Kirjastus: Manning Publications
Keel: eng
ISBN-13: 9781638350323

Teised raamatud teemal:

Web programming

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Whether for building interactive browser-based applications or creating server-side applications in Node, JavaScript is the most widely used language for web programming. With new features, language improvements, paradigms, and potential use cases appearing regularly, theres never been a more exciting time to be a JavaScript developer.

In The Joy of JavaScript, author and JavaScript expert Luis Atencio teaches you key design concepts that lead to clean, lean, modular, and easy-to-maintain code.

Key features

JavaScripts objects and module system

Working with higher order functions

Driving application business logic with functional programming principles

Dynamically hooking into data with Proxy and Reflect APIs

Static type-checking with Flow

Taming complex asynchronous behavior using reactive programming

Audience

Perfect for intermediate JavaScript developers with basic familiarity with HTTP, HTML/CSS, and Git/CLI.

About the technology

JavaScript is multi-paradigm, supporting object-oriented, functional, reactive, and event-driven styles of programming. And transpilers like Babel make it possible to compile code written in other languages into JavaScript.

Luis Atencio is a software engineer for Citrix Systems, where he develops and architects web applications leveraging Java, PHP, and JavaScript platforms. He blogs about software engineering at http://luisatencio.net, has spoken in many dev conferences, and has written articles for PHPArch magazine and DZone Refcardz. Luis is the author of Mannings Functional Programming in JavaScript and the co-author of Mannings RxJS in Action.

Preface

xiii

Acknowledgments

About this book

xvii

About the author

xxi

About the cover illustration

xxii

1 JavaScript reloaded

(20)

1.1 Evolving JavaScript

(1)

1.2 Objects

(2)

1.3 Functions

(5)

1.4 Code

(1)

1.5 Data

(3)

1.6 Sample application: Blockchain

(5)

PART I OBJECTS

(50)

2 Inheritance-based object modeling

(19)

2.1 Reviewing prototypal inheritance

(6)

Property resolution process

(2)

Differential inheritance

(1)

2.2 Constructor functions

(6)

Functions as templates

(1)

Sharing properties by using constructors and prototypes

(5)

2.3 Class-based inheritance

(6)

3 Linked, compositional object models

(29)

3.1 Types of object links

(2)

Implicit

(1)

Explicit

(1)

3.2 OLOO

(5)

3.3 Understanding Object assign

(4)

Object assign uncovered

(2)

Assignment vs definition

(1)

3.4 Assembling objects using mixin composition

(12)

Anatomy of a mixin

(3)

Multiple inheritance and linearization

(2)

Composing objects using Object.assign and the spread operator

(1)

3.5 Applying shared mixins to multiple objects

(5)

PART 2 FUNCTIONS

(84)

4 Writing composable, pure code

(41)

4.1 What is functional programming?

(4)

Functions as data

(2)

The functional way

(1)

4.2 Functional versus imperative at a glance

(2)

4.3 Composition: The functional way

(9)

Working with side effects

(3)

Decomposing complex code

(3)

4.4 Currying and closures

(10)

Curried function application

(5)

The curry and composition dynamic duo

(4)

4.5 Working with immutable objects

100

(4)

4.6 Point-free coding

104

(2)

4.7 Imperative to functional transformation

106

(5)

4.8 Native function chains

111

(3)

4 Higher-kinded composition

114

(41)

5.1 Closing over data types

117

(5)

5.2 New Array APIs: {flat, flatMap}

122

(1)

Array.prototype.flat

122

(1)

Array.prototype.flatMap

122

(1)

5.3 The map/compose correspondence

123

(1)

5.4 Universal contracts

124

(7)

Functors

124

(3)

Monads

127

(4)

5.5 Contextual validation with higher-order functions

131

(19)

Kinds of ADTs

131

(1)

Choices

132

(2)

Modeling success and failure with the Validation monad

134

(4)

Composing with monads

138

(4)

Higher-kinded composition with Validation

142

(2)

Point-free coding with monads

144

(2)

Reducing complex data structures

146

(3)

Third-party integration

149

(1)

5.6 Higher-kinded composition with method extraction and dynamic binding

150

(5)

PART 3 CODE

155

(68)

6 ECMAScript Modules

157

(26)

6.1 Past state of affairs

158

(2)

6.2 Module patterns

160

(7)

Object namespaces

161

(2)

Immediately Invoked Function Expressions (IIFEs)

163

(1)

IIFE mixins

164

(1)

Factory functions

165

(2)

6.3 Static vs. dynamic module systems

167

(3)

6.4 ESM basics

170

(8)

Path specifiers

171

(1)

Exporting

172

(2)

Importing

174

(3)

A new extension in town

177

(1)

6.5 Benefits of ESM for tooling

178

(5)

Dead-code elimination and tree-shaking

178

(2)

Faster property lookups

180

(1)

Type-friendliness

181

(2)

7 Hooked on metaprogramming

183

(40)

7.1 Common uses of metaprogramming in JavaScript

184

(2)

7.2 JavaScript symbols

186

(2)

7.3 Symbol registries

188

(2)

Local registry

188

(1)

Global registry

189

(1)

7.4 Practical application of symbols

190

(8)

Hidden properties

190

(1)

Interoperability

191

(5)

Serialization

196

(2)

7.5 Well-known symbols

198

(13)

@@toStringTag

198

(1)

@@isConcatSpreadable

199

(1)

@@species

200

(3)

@@toPrimitive

203

(2)

@@iterator

205

(6)

7.6 Dynamic introspection and weaving

211

(7)

Proxy objects

212

(3)

The Reflect API

215

(1)

Additional use cases

216

(2)

7.7 Implementing method decorators

218

(5)

PART 4 DATA

223

(83)

8 Linear async flows

225

(35)

8.1 Architecture at a glance

226

(2)

8.2 JavaScript as promised

228

(16)

Principle of data locality

231

(1)

Are promises algebraic?

231

(3)

Fluent chaining

234

(8)

Promises in the wild

242

(2)

8.3 API review: Promise combinators

244

(5)

Promise.all

246

(1)

Promise.race

247

(1)

Promise.allSettled

247

(1)

Promise, any

248

(1)

8.4 async made easy

249

(3)

8.5 async iteration

252

(5)

8.6 Top-level await

257

(3)

9 Streams programming

260

(46)

9.1 Iterables and Iterators

262

(4)

Iterable protocol

262

(1)

Iterator protocol

263

(1)

Examples

263

(3)

9.2 Generators

266

(7)

To return or to yield

266

(1)

Creating iterable objects

267

(2)

Async generators

269

(4)

9.3 Working with data streams

273

(5)

What is a stream?

274

(1)

Implementing a streamable array

275

(3)

9.4 Welcoming a new native: Observable

278

(26)

What is an Observable?

279

(2)

Creating custom observables

281

(1)

Building your own reactive toolkit

282

(6)

Observable mixin extension

288

(2)

Representing push streams with generators

290

(5)

Pipeable operators

295

(2)

Streamifying objects

297

(3)

Dynamic streamification

300

(4)

9.5 Closing thoughts

304

(2)

Appendix A Configuring Babel

306

(2)

Appendix B Typed JavaScript<T>

308

(17)

Index

325

Luis Atencio is a software engineer for Citrix Systems, where he develops and architects web applications leveraging Java, PHP, and JavaScript platforms. He blogs about software engineering at http://luisatencio.net, has spoken in many dev conferences, and has written articles for PHPArch magazine and DZone Refcardz. Luis is the author of Mannings Functional Programming in JavaScript and the co-author of Mannings RxJS in Action.

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