export const  getQueryString=(name)=>{
  var reg = new RegExp("(^|&)" + name + "=([^&]*)(&|$)", "i");
  var r = window.location.search.substr(1).match(reg);
  if (r != null) return unescape(r[2]);
  return null;
}

// 前30天的时间段
export const nowMonth = () => {
  const end = new Date();
  const start = new Date();
  start.setTime(start.getTime() - 3600 * 1000 * 24 * 30);
  return start
}

// 当前的时间段
export const nowDay = () => {
  const end = new Date();
  return end
}




// 补0操作
function buling (num) {
  if (num < 10) {
    return '0' + num
  } else {
    return num
  }
}