<html> <head> <meta name="viewport" content="width=device-width" /> <title>Jquery 操作cookie示例</title> <link href="~/Css/css.css" rel="stylesheet" /> <script src="~/Js/jquery-3.1.1.min.js"></script> <script> jQuery.cookie = function (name, value, options) { if (typeof value != 'undefined') { options = options || {}; if (value === null) { value = ''; 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; } } //写cookie //注:如果想让cookie在主域名下的所有二级域名共用,需要设置domain为′.youdomain.com′ //domain:创建cookie所在网页所拥有的域名;secure:默认是false,如果为true,cookie的传输协议需为https //expires: 过期时间 单位天 $.cookie("example", "笔记本电脑", { expires: 1, domain: 'localhost' }); //读cookie var a = $.cookie("example"); alert(a); //清空cookie //$.cookie("example", null); //alert($.cookie("example")); </script> </head> <body> <div> </div> </body> </html>