vuecli build之后的ie9以上兼容问题?报错

let util = {}
util.getLocal = function(key) {
	return JSON.parse(localStorage.getItem(key))
}
util.setLocal = function(key, obj) {
	localStorage.setItem(key, JSON.stringify(obj))
}
util.removeLocal = function(key) {
	localStorage.removeItem(key);
}
util.clearLocal = function(key) {
	localStorage.clear();
}
util.getSession = function(key) {
	return JSON.parse(sessionStorage.getItem(key))
}
util.setSession = function(key, obj) {
	sessionStorage.setItem(key, JSON.stringify(obj))
};
util.removeSession = function(key) {
	sessionStorage.removeItem(key);
}
util.claerSession = function(key) {
	sessionStorage.clear()
}
/*
 * 受理状态转换成中文和颜色
 * status //受理状态
 */
util.getRepairStatus = function(status) {
	debugger;
	let statusName;
	let color;
	switch(status) {
		case "officerResponse":
			statusName = '未受理';
			color = '#ff0c00';
			break;
		case "officerResponse2":
			statusName = '维修中';
			color = '#f8ba3f';
			break;
		case "workerFinish":
			statusName = '已完工';
			color = '#747474';
			break;
		case "workerOnsiteCheckin":
			statusName = '维修中';
			color = '#f8ba3f';
			break;
		case "close":
			statusName = '已关闭';
			color = '#6176f7';
			break;
		case "workerResponse":
			statusName = '已派工';
			color = '#00a8ff';
			break;
		case "officerAudit":
			statusName = '受理中';
			color = '#35a235';
			break;
		case "cancel":
			statusName = '已取消';
			color = '#fe5a00';
			break;
		case "userAudit":
			statusName = '已完工';
			color = '#747474';
			break;
		case "end":
			statusName = '已结束';
			color = '#aba9a9';
			break;
		default:
			statusName = "未受理";
			color = "#ff0c00";
	};
	return {
		statusName: statusName,
		color: color
	}

}
/*
 * 设置端报修提醒设置转换
 */
util.switchStr=function(status){
	let statusName="";
	switch(status) {
		case "check":
			statusName = '未受理（等待承修单位受理）';
			break;
			case "response":
			statusName = '相应（承修单位已经响应为派工）';
			break;
			case "dispatch":
			statusName = '派工（单位承修已经派工）';
			break;
			case "repairing":
			statusName = '维修中（维修中）';
			break;
			case "finish":
			statusName = '完工（完工）';
			break;
			case "close":
			statusName = '关闭（受理关闭）';
			break;
			case "overhaul":
			statusName = '大维修（所有大维修的单据）';
			break;
			case "rework":
			statusName = '已返修（等待客服审核）';
			break;
			case "evaluate":
			statusName = '评价（等待客服审核）';
			break;
	};
	return statusName;
}
//负责人真实姓名
util.getOrgMemberName=function(picUserObj){
	let realname="";
	if(picUserObj.userMember){
		if(picUserObj.userMember.studentBean){
			realname=picUserObj.userMember.studentBean.name
		}else{
			realname=picUserObj.userMember.employeeBean.name
		}
	}else{
		realname=picUserObj.nickName;
	}
	return realname;
}
//负责人真实姓名
util.getOrgName=function(picUserObj){
	let realorganization="";
	if(picUserObj.userMember){
		if(picUserObj.userMember.studentBean){
			if(picUserObj.userMember.studentBean.organization){
				realorganization=picUserObj.userMember.studentBean.organization.name
			}
		}else{
			if(picUserObj.userMember.employeeBean.organization){
				realorganization=picUserObj.userMember.employeeBean.organization.name
			}
		}
	}
	return realorganization;
}
//制保留2位小数，如：2，会在2后面补上00.即2.00 
util.toDecimal2=function (x) { 
  var f = parseFloat(x); 
  if (isNaN(f)) { 
    return false; 
  } 
  var f = Math.round(x*100)/100; 
  var s = f.toString(); 
  var rs = s.indexOf('.'); 
  if (rs < 0) { 
    rs = s.length; 
    s += '.'; 
  } 
  while (s.length <= rs + 2) { 
    s += '0'; 
  } 
  return s; 
}
export default util

这是我的util.js

但是build之后Ie10报错