Wutou JavaScript learning notes

1. var life ={}; class definition.

In the process of assigning values to life. Age, define attributes, life. HanShu = function () {alert ('test')}: Define methods.

2. With (arguments. callee) {}, usage: indicates the execution object of the current event (similar to the usage in with and Delphi), that is, the object can be directly stored in () {You can call the method property of an object by writing its attributes and methods }.

Iii. types: NULL, undefined, bool, number, String, object, datetime.

4. categories are windows attributes. Methods and classes can be accessed by subscript like arrays. Just like the indexes in C #, strings can be used as subscripts to access the attributes or methods of objects (classes or methods.

5. This keyword of limit Crip is like a pointer. Specifically, it refers to who is usually very depressing.

6. Prototype. js can use prototype to make it have attributes and methods of the parent object. It is equivalent to inheritance in C #, but it is essentially a prototype chain, not a parent-child relationship in C. The prototype can also add attributes and methods to defined objects, including adding defined objects to the system (not recommended ).

7. Closure: Define the attributes, events, and methods of objects within the method (define anonymous methods in the method) to form a false class. Class in C.

8. JSON; defines the JSON data format, and VAR jsonclass = {SX1: "property 1", sx2: "Property 2", sx3 {sx11: "" property 1, sx12: "attribute 2"}, FF: function () {}, SZ: [Character 1, character 2]}