book

JavaScript

by T. J. Crowder

July 2020

Intermediate to advanced

608 pages

15h 43m

English

Wrox

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WHAT DOES THIS BOOK COVER?WHO SHOULD READ THIS BOOKHOW TO USE THIS BOOKHOW TO CONTACT THE AUTHOR
DEFINITIONS, WHO'S WHO, AND TERMINOLOGYWHAT ARE THE “NEW TOYS”?HOW DO NEW TOYS GET CREATED?KEEPING UP WITH THE NEW TOYSUSING TODAY'S TOYS IN YESTERDAY'S ENVIRONMENTS, AND TOMORROW'S TOYS TODAYREVIEWNOTES
AN INTRODUCTION TO LET AND CONSTTRUE BLOCK SCOPEREPEATED DECLARATIONS ARE AN ERRORHOISTING AND THE TEMPORAL DEAD ZONEA NEW KIND OF GLOBALCONST: CONSTANTS FOR JAVASCRIPTBLOCK SCOPE IN LOOPSOLD HABITS TO NEWNOTE
ARROW FUNCTIONS AND LEXICAL THIS, SUPER, ETC.DEFAULT PARAMETER VALUES“REST” PARAMETERSTRAILING COMMAS IN PARAMETER LISTS AND FUNCTION CALLSTHE FUNCTION NAME PROPERTYFUNCTION DECLARATIONS IN BLOCKSOLD HABITS TO NEW
WHAT IS A CLASS?INTRODUCING THE NEW CLASS SYNTAXCOMPARING WITH THE OLDER SYNTAXCREATING SUBCLASSESLEAVING OFF OBJECT.PROTOTYPENEW.TARGETCLASS DECLARATIONS VS. CLASS EXPRESSIONSMORE TO COMEOLD HABITS TO NEWNOTES
COMPUTED PROPERTY NAMESSHORTHAND PROPERTIESGETTING AND SETTING AN OBJECT'S PROTOTYPEMETHOD SYNTAX, AND SUPER OUTSIDE CLASSESSYMBOLNEW OBJECT FUNCTIONSSYMBOL.TOPRIMITIVEPROPERTY ORDERPROPERTY SPREAD SYNTAXOLD HABITS TO NEWNOTES
ITERATORS, ITERABLES, THE FOR-OF LOOP, AND ITERABLE SPREAD SYNTAXGENERATOR FUNCTIONSOLD HABITS TO NEWNOTES
OVERVIEWBASIC OBJECT DESTRUCTURINGBASIC ARRAY (AND ITERABLE) DESTRUCTURINGDEFAULTSREST SYNTAX IN DESTRUCTURING PATTERNSUSING DIFFERENT NAMESCOMPUTED PROPERTY NAMESNESTED DESTRUCTURINGPARAMETER DESTRUCTURINGDESTRUCTURING IN LOOPSOLD HABITS TO NEWNOTES
WHY PROMISES?PROMISE FUNDAMENTALSUSING AN EXISTING PROMISEADDING HANDLERS TO ALREADY SETTLED PROMISESCREATING PROMISESOTHER PROMISE UTILITY METHODSPROMISE PATTERNSPROMISE ANTI-PATTERNSPROMISE SUBCLASSESOLD HABITS TO NEWNOTES

ASYNC FUNCTIONSASYNC ITERATORS, ITERABLES, AND GENERATORSOLD HABITS TO NEWNOTES
TEMPLATE LITERALSIMPROVED UNICODE SUPPORTITERATIONNEW STRING METHODSUPDATES TO THE MATCH, SPLIT, SEARCH, AND REPLACE METHODSOLD HABITS TO NEWNOTES
NEW ARRAY METHODSITERATION, SPREAD, DESTRUCTURINGSTABLE ARRAY SORTTYPED ARRAYSOLD HABITS TO NEWNOTES
MAPSSETSWEAKMAPSWEAKSETSOLD HABITS TO NEWNOTES
INTRODUCTION TO MODULESMODULE FUNDAMENTALSRENAMING EXPORTSRE-EXPORTING EXPORTS FROM ANOTHER MODULERENAMING IMPORTSIMPORTING A MODULE'S NAMESPACE OBJECTEXPORTING ANOTHER MODULE'S NAMESPACE OBJECTIMPORTING A MODULE JUST FOR SIDE EFFECTSIMPORT AND EXPORT ENTRIESIMPORTS ARE LIVE AND READ-ONLYMODULE INSTANCES ARE REALM-SPECIFICHOW MODULES ARE LOADEDIMPORT/EXPORT SYNTAX REVIEWDYNAMIC IMPORTTREE SHAKINGBUNDLINGIMPORT METADATAWORKER MODULESOLD HABITS TO NEW
REFLECTPROXYOLD HABITS TO NEWNOTES
THE FLAGS PROPERTYNEW FLAGSNAMED CAPTURE GROUPSLOOKBEHIND ASSERTIONSUNICODE FEATURESOLD HABITS TO NEWNOTES
INTRODUCTIONHERE THERE BE DRAGONS!BROWSER SUPPORTSHARED MEMORY BASICSMEMORY IS SHARED, NOT OBJECTSRACE CONDITIONS, OUT-OF-ORDER STORES, STALE VALUES, TEARING, AND MORETHE ATOMICS OBJECTSHARED MEMORY EXAMPLEHERE THERE BE DRAGONS! (AGAIN)OLD HABITS TO NEWNOTES
BIGINTNEW INTEGER LITERALSNEW MATH METHODSEXPONENTIATION OPERATOR (**)DATE.PROTOTYPE.TOSTRING CHANGEFUNCTION.PROTOTYPE.TOSTRING CHANGENUMBER ADDITIONSSYMBOL.ISCONCATSPREADABLEVARIOUS SYNTAX TWEAKSVARIOUS STANDARD LIBRARY / GLOBAL ADDITIONSANNEX B: BROWSER-ONLY FEATURESTAIL CALL OPTIMIZATIONOLD HABITS TO NEWNOTES
PUBLIC AND PRIVATE CLASS FIELDS, METHODS, AND ACCESSORSOLD HABITS TO NEWNOTES
TOP-LEVEL AWAITWEAKREFS AND CLEANUP CALLBACKSREGEXP MATCH INDICESSTRING.PROTOTYPE.REPLACEALLATOMICS ASYNCWAITVARIOUS SYNTAX TWEAKSLEGACY DEPRECATED REGEXP FEATURESTHANK YOU FOR READING!NOTES
FEATURES IN ALPHABETICAL ORDERNEW FUNDAMENTALSNEW SYNTAX, KEYWORDS, OPERATORS, LOOPS, AND SIMILARNEW LITERAL FORMSSTANDARD LIBRARY ADDITIONS AND CHANGESMISCELLANEOUS

Overview

All of JavaScript's newest features, in depth, made easy to understand.

JavaScript is a rapidly changing language and it can be challenging to keep up with all the new toys being added. JavaScript: The New Toys explores the newest features of the world's most popular programming language while also showing readers how to track what's coming next. After setting the stage by covering who manages the process of improving JavaScript, how new features get introduced, terminology, and a high-level overview of new features, it details each new or updated item in depth, with example uses, possible pitfalls, and expert recommendations for updating old habits in light of new features. JavaScript: The New Toys:

Covers all the additions to JavaScript in ES2015-ES2020 plus a preview of what's coming next
Explores the latest syntax: nullish coalescing, optional chaining, let and const, class syntax, private methods, private fields, new.target, numeric separators, BigInt, destructuring, default parameters, arrow functions, async functions, await, generator functions, ... (rest and spread), template literals, binary and octal literals, ** (exponentiation), computed property/method names, for-of, for-await-of, shorthand properties, and others
Details the new features and patterns including modules, promises, iteration, generators, Symbol, Proxy, reflection, typed arrays, Atomics, shared memory, WeakMap, WeakSet, and more
Highlights common pitfalls and explains how to avoid them
Shows how to follow the improvements process and even participate in the process yourself
Explains how to use new features even before they're widely supported

With its comprehensive coverage and friendly, accessible style, JavaScript: The New Toys provides an invaluable resource for programmers everywhere, whether they work in web development, Node.js, Electron, Windows Universal Apps, or another JavaScript environment.