IE 11和const的兼容问题

说好的IE11兼容javascript中的常量类型 const 呢 ？可能并没有完全兼容

项目中遇到一个问题，采用google浏览器访问没问题，在本地jetty启动，IE11也可以正常访问，然而当我将项目打成WAR包，放到server(linux环境)上时，

报错如下：

console

debugger

代码如下：

function equitySecTypeHandler(form, secType) {

    // error here
    const COMMON_STOCK = "Common Stocks";
    const SHARES_ETF = "Listed shares / ETF without complex features";

    var prdRiskRating = form.getValue('prdRiskRating');
    var complexPrd = form.getValue('complexPrd');
    var derivatives = form.getValue('derivatives');
    var sfcSpecifiedJuris = form.getValue('sfcSpecifiedJuris');
    var piPrdFlag = form.getValue('piPrdFlag');
    var prdClassification = form.getValue('prdClassification');
    var equitySecType = form.getValue('equitySecType');

    clearExtraTab(form);
    var returnBean = new Object();
    if(secType == null) {
        return returnBean;
    }

    if(equitySecTypeMap[equitySecType] == COMMON_STOCK) {
        returnBean.complexPrd = 'N';
        returnBean.derivatives = 'N';
        for(var key in prdClassificationMap){
            if(prdClassificationMap[key] == SHARES_ETF) {
                returnBean.prdClassification = key;
                break;
            }
        }
        returnBean.piPrdFlag = 'N';
    }
    return returnBean;
}

注释掉const语句，问题解决