Nowadays I am playing with KonvaJS. I have set a click event listener on a shape. When I click on shape, the listener is invoked. In my listener I am invoking event.preventDefault() method to stop triggering of other events. But when I do so it says that:
Uncaught TypeError: event.preventDefault is not a function
I don't know what I am missing. Here is my code :
<!DOCTYPE html>
<html>
<head>
<script src=".9.5/konva.min.js"></script>
<meta charset="utf-8">
<title>Konva Scale Animation 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 gArrow2 = new Image();
var circle2 = new Konva.Image({
x: 60, //on canvas
y: 60,
image: gArrow2,
name: 'abc',
id: 'xyz',
draggable:true
});
circle2.on('click',function(event){
event.preventDefault()
console.log(e.type);
});
circle2.on('mouseup',function(event){
event.preventDefault()
console.log(e.type);
});
gArrow2.onload = function() {
layer.add(circle2);
layer.draw();
}
gArrow2.src = '.png';
var period = 1500;
var amplitude = 10;
var centerX = stage.getWidth() / 2;
var centerY = stage.getHeight() / 2;
var anim = new Konva.Animation(function(frame) {
circle2.setY(amplitude * Math.sin(frame.time * 2 * Math.PI / period) + centerY);
}, layer);
anim.start();
</script>
</body>
</html>
Nowadays I am playing with KonvaJS. I have set a click event listener on a shape. When I click on shape, the listener is invoked. In my listener I am invoking event.preventDefault() method to stop triggering of other events. But when I do so it says that:
Uncaught TypeError: event.preventDefault is not a function
I don't know what I am missing. Here is my code :
<!DOCTYPE html>
<html>
<head>
<script src="https://cdn.rawgit./konvajs/konva/0.9.5/konva.min.js"></script>
<meta charset="utf-8">
<title>Konva Scale Animation 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 gArrow2 = new Image();
var circle2 = new Konva.Image({
x: 60, //on canvas
y: 60,
image: gArrow2,
name: 'abc',
id: 'xyz',
draggable:true
});
circle2.on('click',function(event){
event.preventDefault()
console.log(e.type);
});
circle2.on('mouseup',function(event){
event.preventDefault()
console.log(e.type);
});
gArrow2.onload = function() {
layer.add(circle2);
layer.draw();
}
gArrow2.src = 'http://konvajs.github.io/assets/snake.png';
var period = 1500;
var amplitude = 10;
var centerX = stage.getWidth() / 2;
var centerY = stage.getHeight() / 2;
var anim = new Konva.Animation(function(frame) {
circle2.setY(amplitude * Math.sin(frame.time * 2 * Math.PI / period) + centerY);
}, layer);
anim.start();
</script>
</body>
</html>
- See Konva docs for cancelBubble – Vanquished Wombat Commented Jan 26, 2021 at 15:40
2 Answers
Reset to default 7It seems that KonvaJS's on handler does not give you directly the browser events but an object that looks like: .
The browser's original event is stored in the evt property.
In your code, try to replace event.preventDefault() by event.evt.preventDefault(): http://plnkr.co/edit/tCESd42r67TzeuLiISxU.
If you want other events not to be triggered then KonvaJS has a property called cancelBubble for event which you can set to true. By using this need not to look for event.preventDefault() function. Here's the plunkr to demonstrate.
triangle.on('mouseup', function(e) {
e.cancelBubble = true;
console.log('Triangle mouse up');
});