HTML canvas lineCap Property

Introduction

Draw a line with rounded end caps:

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<!DOCTYPE html>
<html>
<body>

<p>The three different line caps:</p>
<canvas id="myCanvas" width="300" height="180" style="border:1px solid #d3d3d3;">
Your browser does not support the HTML5 canvas tag.</canvas>

<script>
var c = document.getElementById("myCanvas");
var ctx = c.getContext("2d");

ctx.beginPath();// w  ww. ja  v a 2  s . c  o  m
ctx.lineWidth = 10;
ctx.lineCap = "butt";
ctx.moveTo(20, 20);
ctx.lineTo(200, 20);
ctx.stroke();

ctx.beginPath();
ctx.lineCap = "round";
ctx.moveTo(20, 40);
ctx.lineTo(200, 40);
ctx.stroke();

ctx.beginPath();
ctx.lineCap = "square";
ctx.moveTo(20, 60);
ctx.lineTo(200, 60);
ctx.stroke();
</script>

</body>
</html>

The lineCap property sets or gets the style of the end caps for a line.

The value "round" and "square" make the lines slightly longer.

The lineCap property Default value: butt 


context.lineCap = "butt|round|square";

Property Values

Value Description
butt Default. A flat edge is added to each end of the line
round A rounded end cap is added to each end of the line
square A square end cap is added to each end of the line



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