HTML Canvas Graphics

The HTML <canvas> element is used to draw graphics on a web page.The graphic to the left is created with <canvas>.

It shows four elements: a red rectangle, a gradient rectangle, a multicolor rectangle, and a multicolor text.

What is HTML Canvas?

The HTML <canvas> element is used to draw graphics, on the fly, via JavaScript.

The <canvas> element is only a container for graphics. You must use JavaScript to actually draw the graphics.

Canvas has several methods for drawing paths, boxes, circles, text, and adding images.

Browser Support

The numbers in the table specify the first browser version that fully supports the <canvas> element.

Element
<canvas>	4.0	9.0	2.0	3.1	9.0

Canvas Examples

A canvas is a rectangular area on an HTML page. By default, a canvas has no border and no content.

The markup looks like this:

<canvas id="myCanvas" width="200" height="100"></canvas>

1	<canvas id="myCanvas" width="200" height="100"></canvas>

Note: Always specify an id attribute (to be referred to in a script), and a width and height attribute to define the size of the canvas. To add a border, use the style attribute.

Here is an example of a basic, empty canvas:

Example

<canvas id="myCanvas" width="200" height="100" style="border:1px solid #000000;">
</canvas>

1 2	<canvas id="myCanvas" width="200" height="100" style="border:1px solid #000000;"> </canvas>

Try it Yourself »

Add a JavaScript

After creating the rectangular canvas area, you must add a JavaScript to do the drawing.

Here are some examples:

Draw a Line

Example

<script>
var c = document.getElementById("myCanvas");
var ctx = c.getContext("2d");
ctx.moveTo(0, 0);
ctx.lineTo(200, 100);
ctx.stroke();
</script>

var c = document.getElementById("myCanvas");

var ctx = c.getContext("2d");

ctx.moveTo(0, 0);

ctx.lineTo(200, 100);

ctx.stroke();

</script>

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Draw a Circle

Example

<script>
var c = document.getElementById("myCanvas");
var ctx = c.getContext("2d");
ctx.beginPath();
ctx.arc(95, 50, 40, 0, 2 * Math.PI);
ctx.stroke();
</script>

var c = document.getElementById("myCanvas");

var ctx = c.getContext("2d");

ctx.beginPath();

ctx.arc(95, 50, 40, 0, 2 * Math.PI);

ctx.stroke();

</script>

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Draw a Text

Example

<script>
var c = document.getElementById("myCanvas");
var ctx = c.getContext("2d");
ctx.font = "30px Arial";
ctx.fillText("Hello World", 10, 50);
</script>

var c = document.getElementById("myCanvas");

var ctx = c.getContext("2d");

ctx.font = "30px Arial";

ctx.fillText("Hello World", 10, 50);

</script>

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Stroke Text

Example

<script>
var c = document.getElementById("myCanvas");
var ctx = c.getContext("2d");
ctx.font = "30px Arial";
ctx.strokeText("Hello World", 10, 50);
</script>

var c = document.getElementById("myCanvas");

var ctx = c.getContext("2d");

ctx.font = "30px Arial";

ctx.strokeText("Hello World", 10, 50);

</script>

Try it Yourself »

Draw Linear Gradient

Example

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

// Create gradient
var grd = ctx.createLinearGradient(0, 0, 200, 0);
grd.addColorStop(0, "red");
grd.addColorStop(1, "white");

// Fill with gradient
ctx.fillStyle = grd;
ctx.fillRect(10, 10, 150, 80);
</script>

var c = document.getElementById("myCanvas");

var ctx = c.getContext("2d");

// Create gradient

var grd = ctx.createLinearGradient(0, 0, 200, 0);

grd.addColorStop(0, "red");

grd.addColorStop(1, "white");

// Fill with gradient

ctx.fillStyle = grd;

ctx.fillRect(10, 10, 150, 80);

</script>

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Draw Circular Gradient

Example

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

// Create gradient
var grd = ctx.createRadialGradient(75, 50, 5, 90, 60, 100);
grd.addColorStop(0, "red");
grd.addColorStop(1, "white");

// Fill with gradient
ctx.fillStyle = grd;
ctx.fillRect(10, 10, 150, 80);
</script>

var c = document.getElementById("myCanvas");

var ctx = c.getContext("2d");

// Create gradient

var grd = ctx.createRadialGradient(75, 50, 5, 90, 60, 100);

grd.addColorStop(0, "red");

grd.addColorStop(1, "white");

// Fill with gradient

ctx.fillStyle = grd;

ctx.fillRect(10, 10, 150, 80);

</script>

Try it Yourself »

Draw Image

<script>
var c = document.getElementById("myCanvas");
var ctx = c.getContext("2d");
var img = document.getElementById("scream");
ctx.drawImage(img, 10, 10);
</script>

var c = document.getElementById("myCanvas");

var ctx = c.getContext("2d");

var img = document.getElementById("scream");

ctx.drawImage(img, 10, 10);

</script>

Try it Yourself »

HTML Canvas Tutorial

To learn more about <canvas>, please read our HTML Canvas Tutorial.

The HTML <canvas> element is used to draw graphics on a web page.

The graphic to the left is created with <canvas>. It shows four elements: a red rectangle, a gradient rectangle, a multicolor rectangle, and a multicolor text.

What is HTML Canvas?

The HTML <canvas> element is used to draw graphics, on the fly, via JavaScript.

The <canvas> element is only a container for graphics. You must use JavaScript to actually draw the graphics.

Canvas has several methods for drawing paths, boxes, circles, text, and adding images.

Browser Support

The numbers in the table specify the first browser version that fully supports the <canvas> element.

Element
<canvas>	4.0	9.0	2.0	3.1	9.0

Canvas Examples

A canvas is a rectangular area on an HTML page. By default, a canvas has no border and no content.

The markup looks like this:

Note: Always specify an id attribute (to be referred to in a script), and a width and height attribute to define the size of the canvas. To add a border, use the style attribute.

Here is an example of a basic, empty canvas:

Example

Try it Yourself »

Add a JavaScript

After creating the rectangular canvas area, you must add a JavaScript to do the drawing.

Here are some examples:

Draw a Line

Example

<script>
var c = document.getElementById("myCanvas");
var ctx = c.getContext("2d");
ctx.moveTo(0, 0);
ctx.lineTo(200, 100);
ctx.stroke();
</script>

var c = document.getElementById("myCanvas");

var ctx = c.getContext("2d");

ctx.moveTo(0, 0);

ctx.lineTo(200, 100);

ctx.stroke();

</script>

Try it Yourself »

Draw a Circle

Example

<script>
var c = document.getElementById("myCanvas");
var ctx = c.getContext("2d");
ctx.beginPath();
ctx.arc(95, 50, 40, 0, 2 * Math.PI);
ctx.stroke();
</script>

var c = document.getElementById("myCanvas");

var ctx = c.getContext("2d");

ctx.beginPath();

ctx.arc(95, 50, 40, 0, 2 * Math.PI);

ctx.stroke();

</script>

Try it Yourself »

Draw a Text

Example

<script>
var c = document.getElementById("myCanvas");
var ctx = c.getContext("2d");
ctx.font = "30px Arial";
ctx.fillText("Hello World", 10, 50);
</script>

var c = document.getElementById("myCanvas");

var ctx = c.getContext("2d");

ctx.font = "30px Arial";

ctx.fillText("Hello World", 10, 50);

</script>

Try it Yourself »

Stroke Text

Example

<script>
var c = document.getElementById("myCanvas");
var ctx = c.getContext("2d");
ctx.font = "30px Arial";
ctx.strokeText("Hello World", 10, 50);
</script>

var c = document.getElementById("myCanvas");

var ctx = c.getContext("2d");

ctx.font = "30px Arial";

ctx.strokeText("Hello World", 10, 50);

</script>

Try it Yourself »

Draw Linear Gradient

Example

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

// Create gradient
var grd = ctx.createLinearGradient(0, 0, 200, 0);
grd.addColorStop(0, "red");
grd.addColorStop(1, "white");

// Fill with gradient
ctx.fillStyle = grd;
ctx.fillRect(10, 10, 150, 80);
</script>

var c = document.getElementById("myCanvas");

var ctx = c.getContext("2d");

// Create gradient

var grd = ctx.createLinearGradient(0, 0, 200, 0);

grd.addColorStop(0, "red");

grd.addColorStop(1, "white");

// Fill with gradient

ctx.fillStyle = grd;

ctx.fillRect(10, 10, 150, 80);

</script>

Try it Yourself »

Draw Circular Gradient

Example

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

// Create gradient
var grd = ctx.createRadialGradient(75, 50, 5, 90, 60, 100);
grd.addColorStop(0, "red");
grd.addColorStop(1, "white");

// Fill with gradient
ctx.fillStyle = grd;
ctx.fillRect(10, 10, 150, 80);
</script>

var c = document.getElementById("myCanvas");

var ctx = c.getContext("2d");

// Create gradient

var grd = ctx.createRadialGradient(75, 50, 5, 90, 60, 100);

grd.addColorStop(0, "red");

grd.addColorStop(1, "white");

// Fill with gradient

ctx.fillStyle = grd;

ctx.fillRect(10, 10, 150, 80);

</script>

Try it Yourself »

Draw Image

<script>
var c = document.getElementById("myCanvas");
var ctx = c.getContext("2d");
var img = document.getElementById("scream");
ctx.drawImage(img, 10, 10);
</script>

var c = document.getElementById("myCanvas");

var ctx = c.getContext("2d");

var img = document.getElementById("scream");

ctx.drawImage(img, 10, 10);

</script>

Try it Yourself »

HTML Canvas Tutorial

To learn more about <canvas>, please read our HTML Canvas Tutorial.

HTML Canvas Graphics

HTML Canvas Graphics

What is HTML Canvas?

Browser Support

Canvas Examples

Example

Draw a Line

Example

Draw a Circle

Example

Draw a Text

Example

Stroke Text

Example

Draw Linear Gradient

Example

Draw Circular Gradient

Example

Draw Image

HTML Canvas Tutorial

What is HTML Canvas?

Browser Support

Canvas Examples

Example

Draw a Line

Example

Draw a Circle

Example

Draw a Text

Example

Stroke Text

Example

Draw Linear Gradient

Example

Draw Circular Gradient

Example

Draw Image

HTML Canvas Tutorial

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