set trackProximity to true by default

lib/index.js

@@ -23,7 +23,7 @@ var geocoderService;
  * a geographical point given as an object with latitude and longitude
  * properties. Search results closer to this point will be given
  * higher priority.
- * @param {Boolean} [options.trackProximity=false] If true, the geocoder proximity will automatically update based on the map view.
+ * @param {Boolean} [options.trackProximity=true] If true, the geocoder proximity will automatically update based on the map view.
  * @param {Array} [options.bbox] a bounding box argument: this is
  * a bounding box given as an array in the format [minX, minY, maxX, maxY].
  * Search results will be limited to the bounding box.
@@ -59,7 +59,7 @@ MapboxGeocoder.prototype = {
     placeholder: 'Search',
     zoom: 16,
     flyTo: true,
-    trackProximity: false,
+    trackProximity: true,
     minLength: 2,
     reverseGeocode: false,
     limit: 5,

test/test.geocoder.js

@@ -27,6 +27,7 @@ test('geocoder', function(tt) {
     t.ok(geocoder.fresh, 'geocoder is initialized with fresh status to enable turnstile event');
     t.equals(geocoder.inputString, '', 'geocoder is initialized with an input string for keeping track of state');
     t.ok(geocoder.eventManager instanceof mapboxEvents, 'the geocoder has a mapbox event manager');
+    t.true(geocoder.options.trackProximity, 'sets trackProximity to true by default');
     t.end();
   });
 
@@ -410,6 +411,16 @@ test('geocoder', function(tt) {
     t.notOk(geocoder.getProximity(), 'proximity unset after zooming out');
   });
 
+  tt.test('options.trackProximity=false', function(t) {
+    t.plan(2);
+
+    setup({
+      trackProximity: false
+    });
+    t.false(geocoder.options.trackProximity, 'track proximity is set to false');
+    t.notOk(geocoder.getProximity(), 'proximity is not available when trackProximity is set to false');
+  });
+
   tt.test('options.setProximity', function(t) {
     t.plan(1);