08.21 javaScript07 Object Concept Create objects Create property action method Traverse prototype

# Object
# # #Object Concept
* objects can be considered as unordered collections of attributes

# # # to create objects object
* Direct Volume {}
* Constructor New Object ()

# # # Actions for object properties
operator.
* operator []
* Attribute detection in Console.log ("name" in obj) true/flase
* Delete attributes Delete unordered Delete No side effects

< Span style= "COLOR: #808080" >
Span style= "COLOR: #b22222" >### method
*  method is also a property


### Object traversal
* for  in
* [] operator

A curly brace {} is an empty object

< Span style= "COLOR: #808080" > < Span style= "COLOR: #b22222" > constructor:

< Span style= "COLOR: #808080" > < Span style= "COLOR: #b22222" > What type object number string

Console.log (Arr.constructor)

Custom Function Construction = = function

Prototype

08.21 javaScript07 Object Concept Create objects Create property action method Traverse prototype