Add Channel param to config for google maps api script tag

README.md

@@ -36,6 +36,7 @@ In `config/environment.js` you can specify:
 - additional Google Maps libraries to be loaded along with this add-on
   (check the full list [here](https://developers.google.com/maps/documentation/javascript/libraries)),
 - optional API key or client ID for your application (additional info could be found [here](https://developers.google.com/maps/web/)),
+- optional [channel](https://developers.google.com/maps/premium/reports/usage-reports#channels),
 - optional version number,
 - optional exclude parameter, which prevents inclusion of the google maps api script tag into the index.html (in case one wants to handle loading of google maps lib by himself),
 - optional language for map localization,

index.js

@@ -32,6 +32,11 @@ module.exports = {
         params.push('client=' + encodeURIComponent(client));
       }
 
+      var channel = gMapConfig.channel;
+      if (channel) {
+        params.push('channel=' + encodeURIComponent(channel));
+      }
+
       var libraries = gMapConfig.libraries;
       if (libraries && libraries.length) {
         params.push('libraries=' + encodeURIComponent(libraries.join(',')));