Java Script Object

Java Script Object

1. How to create

　1) Create in literal form

Example: var = stt{x:1,y:2,y:3};

or var = stt{x:1,

Y:2,

' For ': 3

Note Keywords must be placed in the middle of quotation marks

2) Create an object from new

Example: var = new STT ();

Stt.name = ' small fish ';

Stt.age = 20;

3) Creating an object from a constructor function

Example: Function test (name,age,sex) {

THIS.name = name;

This.age = age;

This.sex = sex; }

var STT = Test (Stt,20,nan);

4) through

2. Ways to Get Properties

　　　1) Object name. Property name Acquisition

Example: Alert (stt.name);

2) object name [' property name '] gets

Example: Alert (stt[' name ');

Note that when there is no quotation mark within [], it is not confined to the object itself but the entire program finds the property name.

3. Adding attributes

　　　　1) Object name. property name = value;

Example Stt.add = ' Taiyuan ';

4. Delete Attributes

　　　　1) Delete Object name. property name;

Example Delete stt.name;

5. Traversing properties

　　　　1) for (var i in STT) {

Console.log (i)}

Note: This traversal knowledge outputs the name of the property in the object.

2) for (var i in STT) {

Console.log (Stt[i])}

Note: This traversal can only be used with [] to find the value of the property. Since the traversal of the resulting property name is string with quotation marks the result is STT. ' The name ' syntax is incorrect.

6. Can write method in object

Example: var = person{

Name = ' Set ';

Age = 20

sex = ' male ';

function speak () {

Console.log (' Speak ');}

}

Person.speak (); Calling methods in an object

　　　　　　　　　　

Java Script Object