title: Style Konva Transformer

You can adjust styles of Konva.Transformer for your web app. You can change stroke, size and fill of all anchors.
Also you can change stroke color and size of border.

Also take a look into Complex Transformer Styling for fine tuning.

Konva Shape transform and selection styling Demoview raw
<!DOCTYPE html>
<html>
  <head>
    <!-- USE DEVELOPMENT VERSION -->
    <script src="https://unpkg.com/[email protected]/konva.min.js"></script>
    <meta charset="utf-8" />
    <title>Konva Select and Transform Styling Demo</title>
    <style>
      body {
        margin: 0;
        padding: 0;
        overflow: hidden;
        background-color: #f0f0f0;
      }
    </style>
  </head>

  <body>
    <div id="container"></div>
    <script>
      var width = window.innerWidth;
      var height = window.innerHeight;

      var stage = new Konva.Stage({
        container: 'container',
        width: width,
        height: height,
      });

      var layer = new Konva.Layer();
      stage.add(layer);

      var circle = new Konva.Circle({
        x: 150,
        y: 150,
        radius: 70,
        fill: 'red',
        draggable: true,
      });
      layer.add(circle);

      // create new transformer
      var tr = new Konva.Transformer({
        anchorStroke: 'red',
        anchorFill: 'yellow',
        anchorSize: 20,
        borderStroke: 'green',
        borderDash: [3, 3],
        nodes: [circle],
      });
      layer.add(tr);
    </script>
  </body>
</html>
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