3j $ {JSON jquery JavaScript}

Javascript

2. Class

   For object-orientedProgramClass is the most familiar key word. For Classes in JS, it refers to objects.

   The new object is generated by the new operator and its object constructor.

   Ex:
   

   VaR Rui = new Rico ();
   

4. Attribute

   There is no practical significance for the existence of light classes. We must pair something with it to form a powerful Power

   Property, just like an object on the server side. js objects can contain data, method, Etc ..

   All attributes are composed of names and values. The attribute name is a string, and the value can be any JS object.

   Ex:
   

   VaR Rui = new Rico ();
   

   Rui. Hand = "two ";
   

   Rui. Leg = 2;
   

   Rui. Birthday = new date (19xx, 8, 1X );
   

   Nested attributes
   

5. Reference Operator

   *We generally use vertices
   .
   Operator to reference the attributes of an object;
   

   If there is an attribute named(RICO. Rui)If you directly useError!
   

   The format of the passed attribute reference operator isObject [propertynameexpression]
   

   Ex:
   

   Object. Rico
   

   Object ['rico']
   

   Object ['R' + 'I' + 'C' + 'O']
   

   Or
   

   VaR r = 'rico ';
   

   Object [R];
   

7. JavaScript Object Notation)

   It is annoying to use the new operator to create a new instance and assign each attribute to create an object using an independent value assignment statement.

   In this case, we can use the object literal to create a object.

   VaR Rui = {

   Hand: "two ",

   Leg: 2,

   Birthday: new date (19xx, 8, 1X ),

   Lei :{

   MM: Max,

   }

   };

    

   // Todo
   

9. Storage reference
11. Function
13. Callback Function
15. This
17. Closure