Okay, I'm venturing into somewhat new terrain here... I've read countless examples providing various levels of clarity on the subject but I'm banging my head against the wall trying to make my example work.
After working through a few easy examples of custom widget for Web AppBuilder and successfully interacting with map and layers, etc. I wanted to try and bring in some of the JSAPI modules.
Objective: hook a dom input field up to event listener/handler that executes a query against a map service. After a few circuitous failed attempts, I settled for trying to adapt this ESRI example:
