Exploring ES6
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Exploring ES6
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About the Book
- Complete contents of this book: http://exploringjs.com/es6/
- Homepage with various resources: http://exploringjs.com/es6.html
About the Author
Bundles that include this book
Table of Contents
-
-
What you need to know about this book
- Audience: JavaScript programmers
- Why should I read this book?
- How to read this book
- Sources of this book
- Glossary
- Conventions
- Demo code on GitHub
- Sidebars
- Footnotes
- Foreword
- Preface
- Acknowledgements
- About the author
-
What you need to know about this book
-
I Background
-
1. About ECMAScript 6 (ES6)
- 1.1 TC39 (Ecma Technical Committee 39)
- 1.2 How ECMAScript 6 was designed
- 1.3 JavaScript versus ECMAScript
- 1.4 Upgrading to ES6
- 1.5 Goals for ES6
- 1.6 Categories of ES6 features
- 1.7 A brief history of ECMAScript
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2. FAQ: ECMAScript 6
- 2.1 How can I use ES6 today?
- 2.2 Isn’t ECMAScript 6 now called ECMAScript 2015?
- 2.3 How do I migrate my ECMAScript 5 code to ECMAScript 6?
- 2.4 Does it still make sense to learn ECMAScript 5?
- 2.5 Is ES6 bloated?
- 2.6 Isn’t the ES6 specification very big?
- 2.7 Does ES6 have array comprehensions?
- 2.8 Is ES6 statically typed?
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3. One JavaScript: avoiding versioning in ECMAScript 6
- 3.1 Versioning
- 3.2 Strict mode and ECMAScript 6
- 3.3 Breaking changes in ES6
- 3.4 Conclusion
- 3.5 Further reading
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4. Core ES6 features
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4.1 From
vartoconst/let - 4.2 From IIFEs to blocks
- 4.3 From concatenating strings to template literals
- 4.4 From function expressions to arrow functions
- 4.5 Handling multiple return values
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4.6 From
fortoforEach()tofor-of - 4.7 Handling parameter default values
- 4.8 Handling named parameters
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4.9 From
argumentsto rest parameters -
4.10 From
apply()to the spread operator (...) -
4.11 From
concat()to the spread operator (...) - 4.12 From function expressions in object literals to method definitions
- 4.13 From constructors to classes
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4.14 From custom error constructors to subclasses of
Error - 4.15 From objects to Maps
- 4.16 New string methods
- 4.17 New Array methods
- 4.18 From CommonJS modules to ES6 modules
- 4.19 What to do next
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4.1 From
-
1. About ECMAScript 6 (ES6)
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II Data
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5. New number and
Mathfeatures- 5.1 Overview
- 5.2 New integer literals
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5.3 New static
Numberproperties -
5.4 New
Mathfunctionality - 5.5 FAQ: numbers
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6. New string features
- 6.1 Overview
- 6.2 Unicode code point escapes
- 6.3 String interpolation, multi-line string literals and raw string literals
- 6.4 Iterating over strings
- 6.5 Numeric values of code points
- 6.6 Checking for inclusion
- 6.7 Repeating strings
- 6.8 String methods that delegate regular expression work to their parameters
- 6.9 Reference: the new string methods
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7. Symbols
- 7.1 Overview
- 7.2 A new primitive type
- 7.3 Using symbols to represent concepts
- 7.4 Symbols as keys of properties
- 7.5 Converting symbols to other primitive types
- 7.6 Wrapper objects for symbols
- 7.7 Crossing realms with symbols
- 7.8 FAQ: symbols
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7.9 The spelling of well-known symbols: why
Symbol.iteratorand notSymbol.ITERATOR(etc.)? - 7.10 The symbol API
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8. Template literals
- 8.1 Overview
- 8.2 Introduction
- 8.3 Examples of using tagged template literals
- 8.4 Implementing tag functions
- 8.5 FAQ: template literals and tagged template literals
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9. Variables and scoping
- 9.1 Overview
-
9.2 Block scoping via
letandconst -
9.3
constcreates immutable variables - 9.4 The temporal dead zone
-
9.5
letandconstin loop heads - 9.6 Parameters as variables
- 9.7 The global object
- 9.8 Function declarations and class declarations
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9.9 Coding style:
constversusletversusvar
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10. Destructuring
- 10.1 Overview
- 10.2 Background: Constructing data versus extracting data
- 10.3 Patterns for destructuring
- 10.4 How do patterns access the innards of values?
- 10.5 Default values
- 10.6 More object destructuring features
- 10.7 More Array destructuring features
- 10.8 You can assign to more than just variables
- 10.9 Pitfalls of destructuring
- 10.10 Examples of destructuring
- 10.11 The destructuring algorithm
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11. Parameter handling
- 11.1 Overview
- 11.2 Parameter handling as destructuring
- 11.3 Parameter default values
- 11.4 Rest parameters
- 11.5 Simulating named parameters
- 11.6 Examples of destructuring in parameter handling
- 11.7 Coding style tips
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11.8 The spread operator (
...)
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5. New number and
-
III Modularity
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12. Callable entities in ECMAScript 6
- 12.1 Overview
- 12.2 Ways of calling in ES6
- 12.3 Recommendations for using callable entities
- 12.4 ES6 callable entities in detail
- 12.5 Dispatched and direct method calls in ES5 and ES6
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12.6 The
nameproperty of functions - 12.7 FAQ: callable entities
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13. Arrow functions
- 13.1 Overview
-
13.2 Traditional functions are bad non-method functions, due to
this - 13.3 Arrow function syntax
- 13.4 Lexical variables
- 13.5 Syntax pitfalls
- 13.6 Immediately-invoked arrow functions
-
13.7 Arrow functions versus
bind() - 13.8 Arrow functions versus normal functions
- 13.9 FAQ: arrow functions
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14. New OOP features besides classes
- 14.1 Overview
- 14.2 New features of object literals
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14.3 New methods of
Object - 14.4 Traversing properties in ES6
- 14.5 Assigning versus defining properties
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14.6
__proto__in ECMAScript 6 - 14.7 Enumerability in ECMAScript 6
- 14.8 Customizing basic language operations via well-known symbols
- 14.9 FAQ: object literals
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15. Classes
- 15.1 Overview
- 15.2 The essentials
- 15.3 Private data for classes
- 15.4 Simple mixins
- 15.5 The details of classes
- 15.6 The details of subclassing
- 15.7 The species pattern
- 15.8 The pros and cons of classes
- 15.9 FAQ: classes
- 15.10 What is next for classes?
- 15.11 Further reading
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16. Modules
- 16.1 Overview
- 16.2 Modules in JavaScript
- 16.3 The basics of ES6 modules
- 16.4 Importing and exporting in detail
- 16.5 The ECMAScript 6 module loader API
- 16.6 Using ES6 modules in browsers
- 16.7 Details: imports as views on exports
- 16.8 Design goals for ES6 modules
- 16.9 FAQ: modules
- 16.10 Advantages of ECMAScript 6 modules
- 16.11 Further reading
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12. Callable entities in ECMAScript 6
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IV Collections
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17. The
for-ofloop- 17.1 Overview
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17.2 Introducing the
for-ofloop -
17.3 Pitfall:
for-ofonly works with iterable values -
17.4 Iteration variables:
constdeclarations versusvardeclarations - 17.5 Iterating with existing variables, object properties and Array elements
- 17.6 Iterating with a destructuring pattern
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18. New Array features
- 18.1 Overview
-
18.2 New static
Arraymethods -
18.3 New
Array.prototypemethods - 18.4 ES6 and holes in Arrays
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18.5 Configuring which objects are spread by
concat()(Symbol.isConcatSpreadable) - 18.6 The numeric range of Array indices
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19. Maps and Sets
- 19.1 Overview
- 19.2 Map
- 19.3 WeakMap
- 19.4 Set
- 19.5 WeakSet
- 19.6 FAQ: Maps and Sets
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20. Typed Arrays
- 20.1 Overview
- 20.2 Introduction
- 20.3 ArrayBuffers
- 20.4 Typed Arrays
- 20.5 DataViews
- 20.6 Browser APIs that support Typed Arrays
- 20.7 Extended example: JPEG SOF0 decoder
- 20.8 Availability
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21. Iterables and iterators
- 21.1 Overview
- 21.2 Iterability
- 21.3 Iterable data sources
- 21.4 Iterating language constructs
- 21.5 Implementing iterables
- 21.6 More examples of iterables
- 21.7 FAQ: iterables and iterators
- 21.8 The ECMAScript 6 iteration protocol in depth
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22. Generators
- 22.1 Overview
- 22.2 What are generators?
- 22.3 Generators as iterators (data production)
- 22.4 Generators as observers (data consumption)
- 22.5 Generators as coroutines (cooperative multitasking)
- 22.6 Examples of generators
- 22.7 Inheritance within the iteration API (including generators)
- 22.8 Style consideration: whitespace before and after the asterisk
- 22.9 FAQ: generators
- 22.10 Conclusion
- 22.11 Further reading
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17. The
-
V Standard library
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23. New regular expression features
- 23.1 Overview
-
23.2 New flag
/y(sticky) -
23.3 New flag
/u(unicode) -
23.4 New data property
flags -
23.5
RegExp()can be used as a copy constructor - 23.6 String methods that delegate to regular expression methods
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24. Asynchronous programming (background)
- 24.1 The JavaScript call stack
- 24.2 The browser event loop
- 24.3 Receiving results asynchronously
- 24.4 Looking ahead
- 24.5 Further reading
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25. Promises for asynchronous programming
- 25.1 Overview
- 25.2 Introduction: Promises
- 25.3 A first example
- 25.4 Three ways of understanding Promises
- 25.5 Creating and using Promises
- 25.6 Examples
- 25.7 Other ways of creating Promises
- 25.8 Chaining Promises
- 25.9 Common Promise chaining mistakes
- 25.10 Tips for error handling
- 25.11 Composing Promises
- 25.12 Two useful additional Promise methods
- 25.13 Node.js: using callback-based sync functions with Promises
- 25.14 ES6-compatible Promise libraries
- 25.15 Next step: using Promises via generators
- 25.16 Promises in depth: a simple implementation
- 25.17 Advantages and limitations of Promises
- 25.18 Reference: the ECMAScript 6 Promise API
- 25.19 Further reading
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23. New regular expression features
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VI Miscellaneous
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26. Unicode in ES6
- 26.1 Unicode is better supported in ES6
- 26.2 Escape sequences in ES6
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27. Tail call optimization
- 27.1 What is tail call optimization?
- 27.2 Checking whether a function call is in a tail position
- 27.3 Tail-recursive functions
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28. Metaprogramming with proxies
- 28.1 Overview
- 28.2 Programming versus metaprogramming
- 28.3 Proxies explained
- 28.4 Use cases for proxies
- 28.5 The design of the proxy API
- 28.6 FAQ: proxies
- 28.7 Reference: the proxy API
- 28.8 Conclusion
- 28.9 Further reading
- 29. Coding style tips for ECMAScript 6
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30. An overview of what’s new in ES6
- 30.1 Categories of ES6 features
-
30.2 New number and
Mathfeatures - 30.3 New string features
- 30.4 Symbols
- 30.5 Template literals
- 30.6 Variables and scoping
- 30.7 Destructuring
- 30.8 Parameter handling
- 30.9 Callable entities in ECMAScript 6
- 30.10 Arrow functions
- 30.11 New OOP features besides classes
- 30.12 Classes
- 30.13 Modules
-
30.14 The
for-ofloop - 30.15 New Array features
- 30.16 Maps and Sets
- 30.17 Typed Arrays
- 30.18 Iterables and iterators
- 30.19 Generators
- 30.20 New regular expression features
- 30.21 Promises for asynchronous programming
- 30.22 Metaprogramming with proxies
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26. Unicode in ES6
- Notes
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