Use JSTS buffer function with Leaflet.js by exporting / importing GeoJSON

buffer.js

function buffer(leafletGeometry, distance){
  var reader, input, buffer, bufferGeoJSON;
  
  reader = new jsts.io.GeoJSONReader();
  input = reader.read(leafletGeometry.toGeoJSON());
  buffer = input.geometry.buffer(distance);

  bufferGeoJSON = new jsts.io.GeoJSONWriter().write(buffer);
  
  return L.geoJson(bufferGeoJSON);
}