Use JavaScript to implement static objects, static methods, and static attributes

1. /*************************************** *
2. * Method 1
3. * All classes, methods, and properties are static types.
4. * You cannot create an instance.
5. **************************************** */
6. VaR time = {
7. Today: '2017-3-8 ′,
8. WEATHER: 'rain ',
9. Show: function (){
10. Alert ('Today is '+ this. Today );
11. }
12. };
13.  
14. // Static objects can be used directly without the need to create an instance
15. Alert ('it is '+ time. Weather + 'today .');
16. Time. Show ();
17.  
18. // The following code will fail because the static class cannot create an instance.
19. // Var T = new time ();
20. // T. Show ();
21.  
22. /*************************************** *
23. * Method 2
24. * Common objects with static and non-static attributes and Methods
25. * Instantiation can be used.
26. * Note:
27. * 1. Use the class name to access static methods/Properties
28. * 2. Use the Instance name to access non-static methods/attributes
29. **************************************** */
30. Function person (name ){
31. // Non-static attributes
32. This. Name = Name;
33. // Non-static method
34. This. Show = function (){
35. Alert ('My name is '+ this. Name + '.');
36. }
37. }
38. // Add static attributes. All users are talking.
39. Person. Mouth = 1;
40. // Add a static method.
41. Person. Cry = function (){
42. Alert ('wa Wa wa... ');
43. };
44. // Use the prototype keyword to add non-static attributes. Each user may have different teeth.
45. Person. Prototype. Teeth = 32;
46.  
47. // Non-static methods must be accessed through class instances
48. VaR me = new person ('hangsan ');
49. // Use non-static methods and attributes
50. Me. Show ();
51. Alert ('I have' + me. Teeth + 'teeth .');
52. // Use static methods and attributes
53. Person. Cry ();
54. Alert ('I have' + person. Mouth + 'mouth .');