jQuery的Cookie操作插件

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jQuery的cookie插件
// jQuery.cookie.js
jQuery.cookie = function(name, value, options) {
	if (typeof value != 'undefined') {
options = options || {};
if (value === null) {
value = '';
options = $.extend({}, options);
options.expires = -1;
}
var expires = '';
if (options.expires && (typeof options.expires == 'number' || options.expires.toUTCString)) {
var date;
if (typeof options.expires == 'number') {
date = new Date();
date.setTime(date.getTime() + (options.expires * 24 * 60 * 60 * 1000));
} else {
date = options.expires;
}
expires = '; expires=' + date.toUTCString();
}
var path = options.path ? '; path=' + (options.path) : '';
var domain = options.domain ? '; domain=' + (options.domain) : '';
var secure = options.secure ? '; secure' : '';
document.cookie = [name, '=', encodeURIComponent(value), expires, path, domain, secure].join('');
	} else {
var cookieValue = null;
if (document.cookie && document.cookie != '') {
var cookies = document.cookie.split(';');
for (var i = 0; i < cookies.length; i++) {
var cookie = jQuery.trim(cookies[i]);
if (cookie.substring(0, name.length + 1) == (name + '=')) {
cookieValue = decodeURIComponent(cookie.substring(name.length + 1));
break;
}
}
}
return cookieValue;
	}
};



具体用法如下:

1、设置cookie的值,比如我们要设置变量名为userid对应值为123的cookie,代码如下:

$.cookie('userid','123');

2、新建一个cookie,并设置cookie的有效期 路径 域名等,代码如下:

$.cookie('userid, '123', {expires: 7, path: '/', domain: 'jquery.com', secure: true});
注意:如果去掉后面{}的参数,新建后将以默认设置生效。

3、删除cookie,即把对应cookie值置为null,代码如下:

$.cookie('userid', null);

4、读取cookie,如读取变量名为userid的cookie值,代码如下:
var uId= $.cookie('userid');


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