LimeJS教会了你什么1——客户端认证

stefan

1. goog.provide('lime.userAgent');
   
2. 
   
3. goog.require('goog.userAgent');
   
4. 
   
5. 
   
6. (function() {
   
7. 
   
8. 
   
9. var ua = goog.userAgent.getUserAgentString();
   
10. 
    
11. /**
    
12. * Whether the user agent is running on iOS device
    
13. * @type boolean
    
14. */
    
15. lime.userAgent.IOS = goog.userAgent.WEBKIT && goog.userAgent.MOBILE &&
    
16.     (/(ipod|iphone|ipad)/i).test(ua);
    
17. 
    
18. 
    
19. /**
    
20. * Whether the user agent is running on Android device
    
21. * @type boolean
    
22. */
    
23. lime.userAgent.ANDROID = goog.userAgent.WEBKIT && goog.userAgent.MOBILE &&
    
24.     (/(android)/i).test(ua);
    
25. 
    
26. 
    
27. /**
    
28. * Whether the user agent is running on iPad
    
29. * @type boolean
    
30. */
    
31. lime.userAgent.IPAD = lime.userAgent.IOS && (/(ipad)/i).test(ua);
    
32. 
    
33. 
    
34. /**
    
35. * Whether the user agent is running on iPhone 4
    
36. * @type boolean
    
37. */
    
38. lime.userAgent.IPHONE4 = lime.userAgent.IOS &&
    
39.     goog.global['devicePixelRatio'] >= 2;
    
40. 
    
41. 
    
42. /**
    
43. * Whether the user agent is running on touch based device
    
44. * @type boolean
    
45. */
    
46. lime.userAgent.SUPPORTS_TOUCH = goog.isDef(document['ontouchmove']);
    
47. 
    
48. 
    
49. })();

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浏览器内核的判定，以及是否为移动设备平台，这两点的判断closure都帮LimeJS做了。剩下的小技巧从上面的代码里发掘，再直白不过了。


该贴已经同步到 stefan的微博