The HTML <canvas> element is used to draw graphics on a web page.
The graphic above is created with <canvas>.
It shows four elements: a red rectangle, a gradient rectangle, a multicolor rectangle, and a multicolor text.
The <canvas> element is only a container for graphics. You must use a script to actually draw the graphics.
Canvas has several methods for drawing paths, boxes, circles, text, and adding images.
The numbers in the table specify the first browser version that fully supports the <canvas> element.
HTML画布 Can Draw Text
Canvas can draw colorful text, with or without animation.
HTML画布 Can Draw Graphics
Canvas has great features for graphical data presentation with an imagery of graphs and charts.
HTML画布 Can be Animated
Canvas objects can move. Everything is possible: from simple bouncing balls to complex animations.
HTML画布 Can be Interactive
Canvas can respond to any user action (key clicks, mouse clicks, button clicks, finger movement).
HTML画布 Can be Used in Games
Canvas' methods for animations, offer a lot of possibilities for HTML gaming applications.
In HTML, a <canvas> element looks like this:
The width and height attribute is necessary to define the size of the canvas.
Tip: You can have multiple <canvas> elements on one HTML page.
By default, the <canvas> element has no border and no content.
To add a border, use a style attribute:
The next chapters show how to draw on the canvas.