ECMAScript6Succinctly

ECMAScript

JavaScript

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4 
Table of Contents 
The Story behind the Succinctly Series of Books ................................................................. 7 
About the Author ..................................................................................................................... 9 
Chapter 1  Introduction ...........................................................................................................10 
Introducing ES6 ....................................................................................................................10 
Getting started ......................................................................................................................10 
Transpilers ...........................................................................................................................12 
Browser support ...................................................................................................................13 
Code listings .........................................................................................................................13 
Chapter 2  Constants and Scoping ........................................................................................14 
Constants .............................................................................................................................14 
Scoping ................................................................................................................................15 
Enhanced regular expressions .............................................................................................17 
Sticky flag .............................................................................................................................17 
Unicode ................................................................................................................................19 
Chapter 3  Enhanced Object Properties ................................................................................21 
Property shorthand ...............................................................................................................21 
Computed property names ...................................................................................................22 
Method properties ................................................................................................................23 
object.assign ........................................................................................................................24 
Math .....................................................................................................................................27 
Number ................................................................................................................................28 
String ....................................................................................................................................29 
Array ....................................................................................................................................32 
Chapter 4  Arrow Functions ...................................................................................................44 

 
 
 
5 
Expression bodies ................................................................................................................44 
Statement bodies .................................................................................................................45 
Lexical (this) .........................................................................................................................45 
Chapter 5  Extended Parameter Handling .............................................................................48 
Default parameter values and optional parameters ..............................................................48 
Rest parameter.....................................................................................................................48 
Spread operator ...................................................................................................................49 
Chapter 6  Template Literals ..................................................................................................51 
String interpolation ...............................................................................................................51 
Custom interpolation ............................................................................................................53 
Dynamic template literals .....................................................................................................54 
Chapter 7  Destructuring Assignment ...................................................................................56 
Array matching .....................................................................................................................56 
Object matching, shorthand notation ....................................................................................56 
Object matching, deep matching ..........................................................................................57 
Object matching, parameter context .....................................................................................57 
Fail-soft destructuring ...........................................................................................................58 
Chapter 8  Modules .................................................................................................................60 
Export ...................................................................................................................................60 
Import ...................................................................................................................................60 
Default ..................................................................................................................................62 
Wildcard ...............................................................................................................................63 
Module loaders .....................................................................................................................64 
Chapter 9  Classes ..................................................................................................................67 
Class definition .....................................................................................................................67 
Class inheritance/base class access ....................................................................................68 