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>
<script src="[email protected]/konva.min.js"></script>
<meta charset="utf-8" />
<title>Konva Line Join Demo</title>
body {
margin: 0;
padding: 0;
overflow: hidden;
background-color: #f0f0f0;
<div id="container"></div>
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.width() / 2,
y: stage.height() / 2,
sides: 3,
radius: 70,
fill: 'red',
stroke: 'black',
strokeWidth: 20,
lineJoin: 'bevel',

triangle.on('mouseover', function () {

triangle.on('mouseout', function () {

// add the shape to the layer

// add the layer to the stage
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