HTML5 canvas Image Tutorial

To create an image with Konva, we can instantiate a Konva.Image() object with image property.

For image property you can use:

  1. instance of window.Image or document.createElement('image')
  2. canvas element
  3. video element

For a full list of attributes and methods, check out the Konva.Image documentation.

If you want to draw SVG image into the canvas take a look into How to draw SVG image post.

Konva Image Demoview raw
<!DOCTYPE html>
<html>
  <head>
    <script src="https://unpkg.com/[email protected]/konva.min.js"></script>
    <meta charset="utf-8" />
    <title>Konva Image 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);

      // main API:
      var imageObj = new Image();
      imageObj.onload = function () {
        var yoda = new Konva.Image({
          x: 50,
          y: 50,
          image: imageObj,
          width: 106,
          height: 118,
        });

        // add the shape to the layer
        layer.add(yoda);
      };
      imageObj.src = '/assets/yoda.jpg';

      // alternative API:
      Konva.Image.fromURL('/assets/darth-vader.jpg', function (darthNode) {
        darthNode.setAttrs({
          x: 200,
          y: 50,
          scaleX: 0.5,
          scaleY: 0.5,
          cornerRadius: 20,
        });
        layer.add(darthNode);
      });
    </script>
  </body>
</html>
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