Add 'export to OSM JSON' as additional option

src/ExportOSMJSON.js

@@ -0,0 +1,24 @@
+class ExportOSMXML {
+  constructor (conf) {
+    this.conf = conf
+    this.elements = {}
+  }
+
+  each (ob, callback) {
+    ob.object.exportOSMJSON(this.conf, this.elements, callback)
+  }
+
+  finish (list) {
+    return {
+      content: JSON.stringify({
+        version: '0.6',
+        generator: 'OpenStreetBrowser',
+        elements: Object.values(this.elements)
+      }, null, '    '),
+      fileType: 'application/json',
+      extension: 'osm.json'
+    }
+  }
+}
+
+module.exports = ExportOSMXML

src/exportAll.js

@@ -6,7 +6,8 @@ const chunkSplit = require('./chunkSplit')
 
 const types = {
   GeoJSON: require('./ExportGeoJSON'),
-  OSMXML: require('./ExportOSMXML')
+  OSMXML: require('./ExportOSMXML'),
+  OSMJSON: require('./ExportOSMJSON')
 }
 
 let tab