import {LineString, Point, Polygon} from 'ol/geom';
import {toContext} from 'ol/render';
import {Circle as CircleStyle, Fill, Stroke, Style} from 'ol/style';


const canvas = document.getElementById('canvas');
const vectorContext = toContext(canvas.getContext('2d'), {size: [100, 100]});

const fill = new Fill({color: 'blue'});
const stroke = new Stroke({color: 'black'});
const style = new Style({
  fill: fill,
  stroke: stroke,
  image: new CircleStyle({
    radius: 10,
    fill: fill,
    stroke: stroke
  })
});
vectorContext.setStyle(style);

vectorContext.drawGeometry(new LineString([[10, 10], [90, 90]]));
vectorContext.drawGeometry(new Polygon([[[2, 2], [98, 2], [2, 98], [2, 2]]]));
vectorContext.drawGeometry(new Point([88, 88]));