10,000 Shapes with Tooltips Stress Test with Konva

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Konva 10,000 Shapes with Tooltips Demoview raw
<!DOCTYPE html>
<html>
  <head>
    <script src="https://unpkg.com/konva@4.0.18/konva.min.js"></script>
    <meta charset="utf-8" />
    <title>Konva 10,000 Shapes with Tooltips Stress Test 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 circlesLayer = new Konva.Layer();
      var tooltipLayer = new Konva.Layer();
      var colors = [
        'red',
        'orange',
        'yellow',
        'green',
        'blue',
        'cyan',
        'purple'
      ];
      var colorIndex = 0;

      for (var i = 0; i < 10000; i++) {
        var color = colors[colorIndex++];
        if (colorIndex >= colors.length) {
          colorIndex = 0;
        }

        var randX = Math.random() * stage.width();
        var randY = Math.random() * stage.height();
        var circle = new Konva.Circle({
          x: randX,
          y: randY,
          radius: 3,
          fill: color,
          name: i.toString()
        });

        circlesLayer.add(circle);
      }

      var tooltip = new Konva.Text({
        text: '',
        fontFamily: 'Calibri',
        fontSize: 12,
        padding: 5,
        visible: false,
        fill: 'black',
        opacity: 0.75,
        textFill: 'white'
      });

      tooltipLayer.add(tooltip);
      stage.add(circlesLayer);
      stage.add(tooltipLayer);

      circlesLayer.on('mousemove', function(e) {
        // update tooltip
        var mousePos = stage.getPointerPosition();
        tooltip.position({
          x: mousePos.x + 5,
          y: mousePos.y + 5
        });
        tooltip.text(
          'node: ' + e.target.name() + ', color: ' + e.target.fill()
        );
        tooltip.show();
        tooltipLayer.draw();
      });
      circlesLayer.on('mouseout', function() {
        tooltip.hide();
        tooltipLayer.draw();
      });
    </script>
  </body>
</html>
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