https://edutechnica.com/lib/vector-canvas.js

1/**
2 * Class for vector images manipulations.
3 * @constructor
4 * @param {DOMElement} container to place canvas to
5 * @param {Number} width
6 * @param {Number} height
7 */
8jvm.VectorCanvas = function(container, width, height) {
9  this.mode = window.SVGAngle ? 'svg' : 'vml';
10  if (this.mode == 'svg') {
11    this.impl = new jvm.SVGCanvasElement(container, width, height);
12  } else {
13    this.impl = new jvm.VMLCanvasElement(container, width, height);
14  }
15  return this.impl;
16};