cookie的设置、读取、删除函数

设置：

export const setCookie = (name, value, day) => {
  if (day !== 0) {
    //当设置的时间等于0时，不设置expires属性，cookie在浏览器关闭后删除
    var expires = day * 24 * 60 * 60 * 1000;
    var date = new Date(+new Date() + expires);
    document.cookie = name + '=' + escape(value) + ';expires=' + date.toUTCString();
  } else {
    document.cookie = name + '=' + escape(value);
  }
};

读取：

export const getCookie = (name) => {
  var arr,
    reg = new RegExp('(^| )' + name + '=([^;]*)(;|$)');
  if ((arr = document.cookie.match(reg))) returnunescape(arr[2]);
  else return null;
};

删除：

export const delCookie = (name) => {
  var exp = new Date();
  exp.setTime(exp.getTime() - 1);
  varcval = getCookie(name);
  if (cval != null) document.cookie = name + '=' + cval + ';expires=' + exp.toGMTString();
};