JSPM

<canvas id="main" width="720" height="480"></canvas>
<script src="https://cdnjs.cloudflare.com/ajax/libs/fabric.js/3.6.2/fabric.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/@arch-inc/fabricjs-layer@latest/dist/index.js"></script>
<script>
  // Create a Fabric.js canvas
  let canvas = new fabric.Canvas(document.getElementById("main"), {
    isDrawingMode: true
  });

  // Create layer manager
  let manager = new fabricLayer.LayerManager(canvas);

  // Add layers
  for (let i = 0; i++; i < 5) {
    manager.addLayer();
  }

  // Set active layer
  manager.activeLayer = manager.getLayer(3);

  // Remove layer
  manager.removeLayer(manager.getLayer(2));

  // Move layer
  manager.moveLayer(manager.activeLayerIndex, manager.activeLayerIndex + 1);

  // Dispose layer manager
  manager.dispose();
</script>