Can never get jsonChange event to fire

[thardy]

I see code like the following in the demo sample... <json-editor [options]="editorOptions" (jsonChange)="changeLog($event)" [data]="data" #editor>

When I code the above, I can never get the "changeLog" method to fire, no matter how I interact with the editor. I've tried text mode, code mode, and adding both modes.

Please help.