用法：
1.引入jquery.cookie.js
2.将cookie写入文件- var COOKIE_NAME = 'username';
- if( $.cookie(COOKIE_NAME) ){
- $("#username").val( $.cookie(COOKIE_NAME) );
- }
- $("#check").click(function(){
- if(this.checked){
- $.cookie(COOKIE_NAME, $("#username").val() , { path: '/', expires: 10 });
- //var date = new Date();
- //date.setTime(date.getTime() + (3 * 24 * 60 * 60 * 1000)); //三天后的这个时候过期
- //$.cookie(COOKIE_NAME, $("#username").val(), { path: '/', expires: date });
- }else{
- $.cookie(COOKIE_NAME, null, { path: '/' }); //删除cookie
- }
- });
expires: (Number | Date) 有效期，能够设置一个整数作为有效期（单位：天），也能够设置一个日期对象作为Cookie的过期日期。假设指定日期为负数。那么此cookie将被删除；假设不设置或者设置为null，那么此cookie将被当作Session Cookie处理，而且在浏览器关闭后删除
path: (String) Cookie的路径属性。默认是创建该cookie的页面路径
domain: (String) Cookie的域名属性，默认是创建该cookie的页面域名
secure: (Boolean) 假设设为true。那么此cookie的传输会要求一个安全协议。比如HTTPS
Usage
Create session cookie:
$.cookie('the_cookie', 'the_value');
Create expiring cookie, 7 days from then:
$.cookie('the_cookie', 'the_value', { expires: 7 });
Create expiring cookie, valid across entire site:
$.cookie('the_cookie', 'the_value', { expires: 7, path: '/' });
Read cookie:
$.cookie('the_cookie'); // => "the_value" $.cookie('not_existing'); // => undefined
Read all available cookies:
$.cookie(); // => { "the_cookie": "the_value", "...remaining": "cookies" }
Delete cookie:
// Returns true when cookie was found, false when no cookie was found...$.removeCookie('the_cookie');
// Same path as when the cookie was written...$.removeCookie('the_cookie', { path: '/' });
Note: when deleting a cookie, you must pass the exact same path, domain and secure options that were used to set the cookie, unless you're relying on the default options that is.
Configuration
raw
By default the cookie value is encoded/decoded when writing/reading, usingencodeURIComponent/decodeURIComponent.
Bypass this by setting raw to true:
$.cookie.raw = true;
json
Turn on automatic storage of JSON objects passed as the cookie value. Assumes JSON.stringify andJSON.parse:
$.cookie.json = true;
Cookie Options
Cookie attributes can be set globally by setting properties of the $.cookie.defaults object
or individually for each call to $.cookie() by
passing a plain object to the options argument. Per-call options override the default options.
expires
expires: 365
Define lifetime of the cookie. Value can be a Number which
will be interpreted as days from time of creation or a Date object.
If omitted, the cookie becomes a session cookie.
path
path: '/'
Define the path where the cookie is valid. By default the path of the cookie is the path of the page where the cookie was created (standard browser behavior). If
you want to make it available for instance across the entire domain use path:
'/'. Default: path of page where the cookie was created.
Note regarding Internet Explorer:
Due to an obscure bug in the underlying WinINET InternetGetCookie implementation, IE’s document.cookie will not return a cookie if it was set with a path attribute containing a filename.
(From Internet Explorer Cookie Internals (FAQ))
This means one cannot set a path using path:
window.location.pathname in case such pathname contains a filename like so: /check.html (or
at least, such cookie cannot be read correctly).
domain
domain: 'example.com'
Define the domain where the cookie is valid. Default: domain of page where the cookie was created.
secure
secure: true
If true, the cookie transmission requires a secure protocol (https). Default: false.
Converters
Provide a conversion function as optional last argument for reading, in order to change the cookie's value to a different representation on the fly.
Example for parsing a value into a number:
$.cookie('foo', '42'); $.cookie('foo', Number); // => 42
Dealing with cookies that have been encoded using escape (3rd
party cookies):
$.cookie.raw = true; $.cookie('foo', );
You can pass an arbitrary conversion function.