cookie操作

 1 var CookieUtil = {
 2     get: function(name) {
 3         var cookieName = encodeURIComponent(name) + "=",
 4             cookieStart = document.cookie.indexOf(cookieName),
 5             cookieValue = null;
 6 
 7         if (cookieStart > -1) {
 8             var cookieEnd = document.cookie.indexOf(";", cookieStart);
 9             if (cookieEnd == -1) {
10                 cookieEnd = document.cookie.length;
11             }
12             cookieValue = decodeURIComponent(document.cookie.substring(cookieStart + cookieName.length, cookieEnd));
13         }
14         return cookieValue;
15     },
16     set: function(name, value, expires, path, domain, secure) {
17         var cookieText = encodeURIComponent(name) + "=" + encodeURIComponent(value);
18 
19         if (expires instanceof Date) {
20             cookieText += "; expires=" + expires.toGMTString();
21         }
22 
23         if (path) {
24             cookieText += "; path=" + path;
25         }
26 
27         if (domain) {
28             cookieText += "; domain=" + domain;
29         }
30 
31         if (secure) {
32             cookieText += "; secure";
33         }
34 
35         document.cookie = cookieText;
36     },
37 
38     unset: function(name, path, domain, secure) {
39         this.set(name, "", new Date(0), path, domain, secure);
40     }
41 };

使用方法

 1 //设置cookie
 2 CookieUtil.set("name", "Nicholas");
 3 CookieUtil.set("book", "Professional JavaScript");
 4 
 5 //读取
 6 console.log(CookieUtil.get("name"));
 7 console.log(CookieUtil.get("book"));
 8 
 9 //删除cookie
10 CookieUtil.unset("name");
11 CookieUtil.unset("book");
12 
13 //设置1个cookie,包括它的路径、域、截止日期
14 CookieUtil.set("name", "Nicholas", "/books/projs/", "www.wrox.com", new Date("January 1, 2010"));
15 
16 //删除同一cookie
17 CookieUtil.unset("name", "/books/projs/", "www.wrox.com");
18 
19 //设置1个安全cookie
20 CookieUtil.set("name", "Nicholas", null, null, null, true);