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Object-Oriented  JavaScript Stoyan Stefanov, Yahoo! Inc. Beijing, Dec 6 th , 2008
About the presenter ,[object Object],[object Object],[object Object],[object Object]
First off…  the Firebug console
Firebug console as a learning tool
Console features ,[object Object],[object Object],[object Object],[object Object]
Any page
Fiddle
Objects
JavaScript !== Java ,[object Object],[object Object]
Data types ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Objects ,[object Object],[object Object]
A simple object ,[object Object],[object Object],[object Object]
A simple object ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Methods ,[object Object]
Object literal notation ,[object Object],[object Object],[object Object],[object Object]
Arrays ,[object Object],[object Object],[object Object]
Arrays ,[object Object],[object Object],[object Object],[object Object],[object Object]
Array literal notation ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
JSON ,[object Object],[object Object],[object Object]
Constructors
Functions ,[object Object],[object Object],[object Object],[object Object],[object Object]
Function ,[object Object],[object Object],[object Object]
Function ,[object Object],[object Object],[object Object]
Function ,[object Object],[object Object],[object Object]
Functions are objects ,[object Object],[object Object],[object Object],[object Object]
Functions are objects ,[object Object],[object Object],[object Object],[object Object],[object Object]
Return values ,[object Object]
Return values ,[object Object]
Return values ,[object Object]
Constructors
Constructor functions ,[object Object],[object Object]
Constructor functions ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Using the constructor ,[object Object],[object Object]
Constructors… ,[object Object]
A naming convention ,[object Object],[object Object]
constructor  property ,[object Object],[object Object],[object Object],[object Object]
constructor  property ,[object Object],[object Object],[object Object],[object Object],[object Object]
Built-in constructors ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Use this Not that var o = {}; var o = new Object(); var a = []; var a = new Array(); var re = /[a-z]/gmi; var re = new RegExp( '[a-z]', 'gmi'); var fn = function(a, b){ return a + b; } var fn = new Function( 'a, b','return a+b');
Prototype
Prototype… ,[object Object]
Prototype ,[object Object],[object Object],[object Object]
Augmenting prototype ,[object Object],[object Object]
Overwriting the prototype ,[object Object],[object Object]
Use of the prototype ,[object Object]
Prototype usage ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Prototype usage ,[object Object],[object Object],[object Object],[object Object],[object Object]
Prototype usage ,[object Object],[object Object],[object Object]
Own properties vs. prototype’s ,[object Object],[object Object],[object Object],[object Object]
isPrototypeOf() ,[object Object],[object Object],[object Object],[object Object]
__proto__ ,[object Object],[object Object]
__proto__ ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Prototype chain
It’s a live chain ,[object Object],[object Object],[object Object],[object Object],[object Object]
Inheritance
Parent constructor ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Child constructor ,[object Object],[object Object],[object Object],[object Object]
The inheritance ,[object Object],[object Object]
A child object ,[object Object],[object Object],[object Object],[object Object]
Inheritance by copying
Two objects ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
extend() ,[object Object],[object Object],[object Object],[object Object],[object Object]
Inheritance ,[object Object],[object Object]
Prototypal inheritance
Beget object ,[object Object],[object Object],[object Object],[object Object],[object Object]
Beget object ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Wrapping up…
Objects ,[object Object],[object Object],[object Object]
Functions ,[object Object],[object Object],[object Object],[object Object]
Prototype ,[object Object],[object Object],[object Object]
Constructor ,[object Object],[object Object]
Class ,[object Object]
Inheritance ,[object Object],[object Object],[object Object],[object Object]
Stoyan Stefanov, http://phpied.com [email_address]

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