前端存储之cookie、localStorage

window.localStorage.setItem(‘a‘, 1)   （window. 可省略）
localStorage.setItem(‘a‘, 1)          //存储数据
localStorage.getItem(‘a‘)             //获取数据
localStorage.removeItem(‘a‘)          //删除指定数据   
localStorage.clear( )  　　　　　　　   //删除全部数据

document.cookie = ‘name=1‘;            //设置cookie
console.log(document.cookie);           //获取cookie   
document.cookie = ‘name=1;expires=‘ + new Date(new Date().setTime(new Date().getTime()-1)).toGMTString();                            
                                    //通过过期时间删除cookie             

//JS操作cookies方法!
//写cookies
function 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]);
else return 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();
}