JS设置cookie:
假设在A页面中要保存变量username的值("jack")到cookie中,key值为name，则相应的JS代码为：document.cookie="name="+username;
JS读取cookie:
假设cookie中存储的内容为：name=jack;password=123
则在B页面中获取变量username的值的JS代码如下：
var username=document.cookie.split(";")[0].split("=")[1];//JS操作cookies方法!//写cookiesfunction setCookie(name,value){var Days = 30;var exp = new Date();exp.setTime(exp.getTime() + Days*24*60*60*1000);document.cookie = name + "="+ escape (value) + ";expires=" + exp.toGMTString();}读取cookies
function getCookie(name){var arr,reg=new RegExp("(^| )"+name+"=([^;]*)(;|$)");if(arr=document.cookie.match(reg))return unescape(arr[2]);elsereturn null;}删除cookies
function delCookie(name){var exp = new Date();exp.setTime(exp.getTime() - 1);var cval=getCookie(name);if(cval!=null)document.cookie= name + "="+cval+";expires="+exp.toGMTString();}//使用示例setCookie("name","hayden");alert(getCookie("name"));//如果需要设定自定义过期时间//那么把上面的setCookie 函数换成下面两个函数就ok;//程序代码function setCookie(name,value,time){var strsec = getsec(time);var exp = new Date();exp.setTime(exp.getTime() + strsec*1);document.cookie = name + "="+ escape (value) + ";expires=" + exp.toGMTString();}function getsec(str){alert(str);var str1=str.substring(1,str.length)*1;var str2=str.substring(0,1);if (str2=="s"){return str1*1000;}else if (str2=="h"){return str1*60*60*1000;}else if (str2=="d"){return str1*24*60*60*1000;}}//这是有设定过期时间的使用示例：//s20是代表20秒//h是指小时，如12小时则是：h12//d是天数，30天则：d30setCookie("name","hayden","s20");cookies操作方法：
// cookie操作function cookie(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;}}js cookie操作
原文地址：https://www.cnblogs.com/fengwenzhee/p/8776252.html