HTML5 Canvas Line Join Tutorial

To set the line join for a shape with Konva, we can set the lineJoin property when we instantiate a shape, or we can use the lineJoin() method.

The lineJoin property can be set to miter, bevel, or round. Unless otherwise specified, the default line join is miter.

Instructions: Mouseover the triangle to change the line join style.

Konva Line Join Demoview raw
<!DOCTYPE html>
<html>
<head>
<script src="https://cdn.rawgit.com/konvajs/konva/1.5.0/konva.min.js"></script>
<meta charset="utf-8">
<title>Konva Line Join 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();
var triangle = new Konva.RegularPolygon({
x: stage.getWidth() / 2,
y: stage.getHeight() / 2,
sides: 3,
radius: 70,
fill: 'red',
stroke: 'black',
strokeWidth: 20,
lineJoin: 'bevel'
});
triangle.on('mouseover', function() {
this.lineJoin('round');
layer.draw();
});
triangle.on('mouseout', function() {
this.lineJoin('bevel');
layer.draw();
});
// add the shape to the layer
layer.add(triangle);
// add the layer to the stage
stage.add(layer);
</script>
</body>
</html>