diff --git a/bricks/widget.js b/bricks/widget.js
index 01a9518..e36080b 100644
--- a/bricks/widget.js
+++ b/bricks/widget.js
@@ -320,6 +320,10 @@ bricks.JsWidget = class {
 		this.dom_element.removeEventListener(eventname, handler);
 	}
 	dispatch(eventname, params){
+		if (params is null){
+			params = {};
+		}
+		params.referer = this.id;
 		var e = new Event(eventname);
 		e.params = params;
 		this.dom_element.dispatchEvent(e);