named-svg.js

var geojson2svg = require('geojson2svg');
var turf = require('turf');
var fs = require('fs')
var polys = require('polygons.json') // a featurecollection of geojson polygons with a name property

polys.features.forEach(function(poly){
  var extent = turf.bbox(poly)
  var options = {
    viewportSize: {width: 200, height: 100},
    mapExtent: {left: extent[0], bottom: extent[1], right: extent[2], top: extent[3]},
    output: 'svg' 
  }
  var converter = geojson2svg(options);
  var svg = converter.convert(poly);

  fs.writeFileSync(poly.properties.name+'.svg', svg)
})