CanvasRenderingContext2D.strokeRect()
The CanvasRenderingContext2D
.strokeRect()
method of the Canvas 2D API paints a rectangle which has a starting point at (x, y) and has a w width and an h height onto the canvas, using the current stroke style.
Syntax
JavaScript
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void <var>ctx.strokeRect(x, y, width, height);</var>
Parameters
-
x
- The x axis of the coordinate for the rectangle starting point.
-
y
- The y axis of the coordinate for the rectangle starting point.
-
width
- The rectangle's width.
-
height
- The rectangle's height.
Examples
Using the strokeRect
method
This is just a simple code snippet which uses the strokeRect
method.
HTML
HTML
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<canvas id="canvas"></canvas>
JavaScript
JavaScript
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var canvas = document.getElementById("canvas"); var ctx = canvas.getContext("2d"); ctx.strokeStyle = "green"; ctx.strokeRect(10, 10, 100, 100);
Edit the code below and see your changes update live in the canvas:
Playable code
HTML
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<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.strokeStyle = "green"; ctx.strokeRect(10, 10, 100, 100);</textarea>
JavaScript
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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.strokeRect' in that specification. |
Living Standard |
Browser compatibility
Feature | Chrome | Firefox (Gecko) | Internet Explorer | Opera | Safari |
---|---|---|---|---|---|
Basic support | (Yes) | (Yes) | (Yes) | (Yes) | (Yes) |
Feature | Android | Chrome for Android | Firefox Mobile (Gecko) | IE Mobile | Opera Mobile | Safari Mobile |
---|---|---|---|---|---|---|
Basic support | (Yes) | (Yes) | (Yes) | (Yes) | (Yes) | (Yes) |
See also
- The interface defining it,
CanvasRenderingContext2D
CanvasRenderingContext2D.strokeStyle
CanvasRenderingContext2D.clearRect()
CanvasRenderingContext2D.fillRect()
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/strokerect