jQuery 如何操作cookie (网上资料太乱,故特意整理最简单的)

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/** * Cookie plugin * * Copyright (c) 2006 Klaus Hartl (stilbuero.de) * Dual licensed under the MIT and GPL licenses: * * * *//** * Create a cookie with the given name and value and other optional parameters. * * @example $.cookie('the_cookie', 'the_value'); * @desc Set the value of a cookie. * @example $.cookie('the_cookie', 'the_value', {expires: 7, path: '/', domain: 'jquery.com', secure: true}); * @desc Create a cookie with all available options. * @example $.cookie('the_cookie', 'the_value'); * @desc Create a session cookie. * @example $.cookie('the_cookie', null); * @desc Delete a cookie by passing null as value. * * @param String name The name of the cookie. * @param String value The value of the cookie. * @param Object options An object literal containing key/value pairs to provide optional cookie attributes. * @option Number|Date expires Either an integer specifying the expiration date from now on in days or a Date object. *If a negative value is specified (e.g. a date in the past), the cookie will be deleted. *If set to null or omitted, the cookie will be a session cookie and will not be retained *when the the browser exits. * @option String path The value of the path atribute of the cookie (default: path of page that created the cookie). * @option String domain The value of the domain attribute of the cookie (default: domain of page that created the cookie). * @option Boolean secure If true, the secure attribute of the cookie will be set and the cookie transmission will *require a secure protocol (like HTTPS). * @type undefined * * @name $.cookie * @cat Plugins/Cookie * @author Klaus Hartl/klaus.hartl@stilbuero.de *//** * Get the value of a cookie with the given name. * * @example $.cookie('the_cookie'); * @desc Get the value of a cookie. * * @param String name The name of the cookie. * @return The value of the cookie. * @type String * * @name $.cookie * @cat Plugins/Cookie * @author Klaus Hartl/klaus.hartl@stilbuero.de */jQuery.cookie = function(name, value, options) {if (typeof value != 'undefined') { // name and value given, set cookieoptions = 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(); // use expires attribute, max-age is not supported by IE}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 { // only name given, get cookievar 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]);// Does this cookie string begin with the name we want?if (cookie.substring(0, name.length + 1) == (name + '=')) {cookieValue = decodeURIComponent(cookie.substring(name.length + 1));break;}}}return cookieValue;}};

调用代码:$.cookie('the_cookie'); // 获得cookie$.cookie('the_cookie', 'the_value'); // 设置cookie$.cookie('the_cookie', 'the_value', { expires: 7 }); //设置带时间的cookie$.cookie('the_cookie', '', { expires: -1 }); // 删除$.cookie('the_cookie', null); // 删除 cookie$.cookie('the_cookie', 'the_value', {expires: 7, path: '/', domain: 'jquery.com', secure: true});//新建一个cookie 包括有效期路径域名等

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