Javascript API in HTML5 Widget

I want to have an HTML Widget in Brightauthor, pointing to a certain webpage I own.

In this webpage I want to use the new Javascript API.

I correctly ticked the box Enable BrightSign JavaScript Object on my Widget

I can also correctly use the former Brightscript-javascript object.

e.g. This code works correctly :

var device_info = new BSDeviceInfo();
var myDeviceInfo = {
'model': device_info.model,
'version': device_info.version
}

Looking at this documentation.

My webpage now fails with this require call...

diClass = require("@brightsign/deviceinfo");

Client side browser javascript doesn't have require like node.js.

Is this new API supposed to work with an HTML5 Widget ?