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