declare let self ; self . importScripts ( "three.min.js" ) ; import { GeoJsonTilerService , VectorTileDecoderService } from "@here/harp-vectortile-datasource/index-worker" ; import { CustomDecoderService } from "./custom_decoder" ; VectorTileDecoderService . start ( ) ; GeoJsonTilerService . start ( ) ; CustomDecoderService . start ( ) ;