我们可以使用 on() 绑定多重事件，事件类型用空格分隔。
说明：鼠标滑过圆形观察 Mouseover、mousedown、 mouseup 事件的执行。
Konva Multi_Event 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 Multi-Event Binding Demo</title>
<style>
body {
margin: 0;
padding: 0;
overflow: hidden;
background-color: #f0f0f0;
}
</style>
</head>
<body>
<div id="container"></div>
<script>
function writeMessage(message) {
text.text(message);
layer.draw();
}
var stage = new Konva.Stage({
container: 'container',
width: window.innerWidth,
height: window.innerHeight
});
var layer = new Konva.Layer();
var text = new Konva.Text({
x: 10,
y: 10,
fontFamily: 'Calibri',
fontSize: 20,
text: '',
fill: 'black'
});
var numEvents = 0;
var circle = new Konva.Circle({
x: stage.width() / 2,
y: stage.height() / 2 + 10,
radius: 70,
fill: 'red',
stroke: 'black',
strokeWidth: 4
});
circle.on('mouseover mousedown mouseup', function() {
writeMessage('Multi-event binding! Events: ' + ++numEvents);
});
circle.on('mouseout', function() {
writeMessage('');
});
layer.add(circle);
layer.add(text);
stage.add(layer);
</script>
</body>
</html>
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