How to check AEM server runmode in Sightly/HTL Using server-side JavaScript

How to check AEM server runmode in Sightly/HTL Using Server-side JavaScript 

Server-side JavaScript
"use strict";
use(function () {
 var myRunmode = this.runmode;
 var isValidRunmode = false; 
 var slingSettingsService = sling.getService(Packages.org.apache.sling.settings.SlingSettingsService);
 var  runModes = slingSettingsService.getRunModes().toString();
 if (runModes && myRunmode) {
  isValidRunmode = (runModes.indexOf(myRunmode) >= 0);
 }
    return {
        hasRunmode : isValidRunmode,
        runmodes:runModes
    };  
});

HTL / Sightly 
<div data-sly-use.checkRunmode="${'check-runmode.js' @ runmode='author'}">
    <div data-sly-test="${checkRunmode.hasRunmode}">Author runmode</div>
    ${checkRunmode.runmodes}
</div>
<div data-sly-use.checkRunmode="${'check-runmode.js' @ runmode='publish'}">
    <div data-sly-test="${checkRunmode.hasRunmode}">Publish runmode</div>
</div>