js实用方法记录-简单cookie操作

js实用方法记录-简单cookie操作

设置cookie

setCookie('test','hello')

setCookie('test','hello',30,false)

/**
* 设置cookie
* @param {string} name cookie名称
* @param {string} value cookie值
* @param {number}[expiredays=null] 过期时间 默认session级别 <=0移除cookie
* @param {bool}[saveRoot=true] 保存的域 默认根域
*/
function setCookie(name, value, expiredays=null,saveRoot=false) {
var exdate = new Date();
exdate.setDate(exdate.getDate() + expiredays)
var cookie = name + "=" + value + ';path=/' + ((expiredays == null) ? "" : ";expires=" + exdate.toGMTString());
if(saveRoot){
//适用于一级，二级，本地域名
var domain =((location.host.match(/\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}/g) || location.hostname=='localhost')? location.hostname:('.' + (location.host.split('.')[2]!=undefined?(location.host.split('.')[1]+'.'+location.host.split('.')[2]):location.host)));
cookie+=(';domain='+domain);
}
document.cookie = cookie;
}

获取cookie

getCookie('test')=='hello'

/**
* 获取cookie
* @param {string} name cookie名称
*/
function getCookie(name) {
var arr, reg = new RegExp("(^| )" + name + "=([^;]*)(;|$)");
if (arr = document.cookie.match(reg))
return unescape(arr[2]);
else
return null;
}