How to add group layers/TOC to ArcGIS web map/web application?

Question

I am new to arcgis online and am trying to create a web map that has some kind of grouped layers. I have tried adding multiple shape files that are all zipped together but because together the files are too large to upload onto the map I have to resort to some other way to do this.

I have come across TOC coding for API and I have never used API before. I was wondering if there was a way to code the TOC or group layers into a web map or web application (without using a template) through the google chrome developer tool? I want to create my web app through the Web Application Builder if possible.

Does anyone know any way to use the developer tool kit on chrome to do this?

Answer 1

With the new 4.0 JS API you can create groups: https://developers.arcgis.com/javascript/beta/api-reference/esri-layers-GroupLayer.html

The Web Scene Viewer in ArcGIS Online also supports groups but currently the 2D map viewer does not have this functionality yet.