import Map from '../src/ol/Map.js';
import _ol_View_ from '../src/ol/View.js';
import {defaults as defaultControls} from '../src/ol/control.js';
import ScaleLine from '../src/ol/control/ScaleLine.js';
import TileLayer from '../src/ol/layer/Tile.js';
import _ol_source_OSM_ from '../src/ol/source/OSM.js';


var scaleLineControl = new ScaleLine();

var map = new Map({
  controls: defaultControls({
    attributionOptions: {
      collapsible: false
    }
  }).extend([
    scaleLineControl
  ]),
  layers: [
    new TileLayer({
      source: new _ol_source_OSM_()
    })
  ],
  target: 'map',
  view: new _ol_View_({
    center: [0, 0],
    zoom: 2
  })
});


var unitsSelect = document.getElementById('units');
function onChange() {
  scaleLineControl.setUnits(unitsSelect.value);
}
unitsSelect.addEventListener('change', onChange);
onChange();