要使用Konva阻止冒泡，我们可以设置cancelBubbleEvent对象的属性设置为true。
说明：点击圆形可以观察到只有圆形事件绑定被触发, 因为事件传播在触发循环事件时被取消，防止事件对象向上冒泡。
Konva Cancel_Propagation Demo 点击查看
<!DOCTYPE html>
<html>
<head>
<script src="https://cdn.rawgit.com/konvajs/konva/1.4.0/konva.min.js"></script>
<meta charset="utf-8">
<title>Konva Cancel Event Bubble Propagation Demo</title>
<style>
body {
margin: 0;
padding: 0;
overflow: hidden;
background-color: #F0F0F0;
}
</style>
</head>
<body>
<div id="container"></div>
<script>
var stage = new Konva.Stage({
container: 'container',
width: 300,
height: 300
});
var layer = new Konva.Layer();
var group = new Konva.Group();
var circle = new Konva.Circle({
x: stage.getWidth() / 2,
y: stage.getHeight() / 2,
radius: 70,
fill: 'red',
stroke: 'black',
strokeWidth: 4
});
circle.on('click', function(evt) {
alert('You clicked the circle!');
evt.cancelBubble = true;
});
group.on('click', function() {
alert('You clicked on the group!');
});
layer.on('click', function() {
alert('You clicked on the layer!');
});
group.add(circle);
layer.add(group);
// add the layer to the stage
stage.add(layer);
</script>
</body>
</html>