Fixes #546, rebind context.dispatch to window.api

API.md

@@ -116,6 +116,10 @@ which are supported in Chrome & Firefox.
 Exposes the [Leaflet.Draw](https://github.com/Leaflet/Leaflet.draw) control
 instance in the console.
 
+## `window.api.on(event, fn)`
+
+Exposes d3 events, including `change`.
+
 ## Protips
 
 To include `turf` from [turf](https://github.com/turfjs/turf) so you can manipulate features

dist/site.js

@@ -25840,6 +25840,8 @@ function api(context) {
         drawControl: context.drawControl,
         data: context.data
     };
+
+    d3.rebind(window.api, context.dispatch, 'on');
 }
 
 },{}],144:[function(require,module,exports){

src/core/api.js

@@ -36,4 +36,6 @@ function api(context) {
         drawControl: context.drawControl,
         data: context.data
     };
+
+    d3.rebind(window.api, context.dispatch, 'on');
 }