CanvasRenderingContext2D.stroke()

The CanvasRenderingContext2D.stroke() method of the Canvas 2D API strokes the current or given path with the current stroke style using the non-zero winding rule.

Syntax

JavaScript
void <var>ctx.stroke();</var>
void <var>ctx.stroke(path);</var>

Parameters

path
A Path2D path to stroke.

Examples

Using the stroke method

This is just a simple code snippet which uses the stroke method to stroke a path.

HTML

HTML
<canvas id="canvas"></canvas>

JavaScript

JavaScript
var canvas = document.getElementById("canvas");
var ctx = canvas.getContext("2d");
ctx.rect(10, 10, 100, 100);
ctx.stroke();

Edit the code below and see your changes update live in the canvas:

Playable code
HTML
<canvas id="canvas" width="400" height="200" class="playable-canvas"></canvas>
<div class="playable-buttons">
  <input id="edit" type="button" value="Edit" />
  <input id="reset" type="button" value="Reset" />
</div>
<textarea id="code" class="playable-code">
ctx.rect(10, 10, 100, 100);
ctx.stroke();</textarea>
JavaScript
var canvas = document.getElementById("canvas");
var ctx = canvas.getContext("2d");
var textarea = document.getElementById("code");
var reset = document.getElementById("reset");
var edit = document.getElementById("edit");
var code = textarea.value;

function drawCanvas() {
  ctx.clearRect(0, 0, canvas.width, canvas.height);
  eval(textarea.value);
}

reset.addEventListener("click", function() {
  textarea.value = code;
  drawCanvas();
});

edit.addEventListener("click", function() {
  textarea.focus();
})

textarea.addEventListener("input", drawCanvas);
window.addEventListener("load", drawCanvas);

Specifications

Specification Status Comment
WHATWG HTML Living Standard
The definition of 'CanvasRenderingContext2D.stroke' in that specification.
Living Standard  

Browser compatibility

Feature Chrome Firefox (Gecko) Internet Explorer Opera Safari
Basic support (Yes) (Yes) (Yes) (Yes) (Yes)
Path parameter (Yes) 31 (31) Not supported (Yes) Not supported
Feature Android Chrome for Android Firefox Mobile (Gecko) IE Mobile Opera Mobile Safari Mobile
Basic support (Yes) (Yes) (Yes) (Yes) (Yes) (Yes)
Path parameter ? ? 31.0 (31) ? ? ?

See also

License

© 2016 Mozilla Contributors
Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-us/docs/web/api/canvasrenderingcontext2d/stroke

API Canvas CanvasRenderingContext2D Method Reference Référence