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The canvas can draw any object, have powerful gradient support, plugins for displaying objects in 3D, filters, etc. Support - When using the DOM, when you want to use experimental features like transformations or animations, you have to use the -moz-, -webkit-, -o-, and -ms- prefixes in CSS. In the canvas, you don't need to worry about that.
- Overview
- Basic example
- Reference
- Guides and tutorials
- Libraries
- Browser compatibility
The Canvas API provides a means for drawing graphics via JavaScript and the HTML element. Among other things, it can be used for animation, game graphics, data visualization, photo manipulation, and real-time video processing.
The Canvas API largely focuses on 2D graphics. The WebGL API, which also uses the element, draws hardware-accelerated 2D and 3D graphics.
HTML JavaScript
The Document.getElementById() method gets a reference to the HTML element. Next, the HTMLCanvasElement.getContext() method gets that element's context—the thing onto which the drawing will be rendered. The actual drawing is done using the CanvasRenderingContext2D interface. The fillStyle property makes the rectangle green. The fillRect() method places its top-left corner at (10, 10), and gives it a size of 150 units wide by 100 tall.
•HTMLCanvasElement
•CanvasRenderingContext2D
•CanvasGradient
•CanvasPattern
•ImageBitmap
•ImageData
Canvas tutorial
A comprehensive tutorial covering both the basic usage of the Canvas API and its advanced features.
HTML5 Canvas Deep Dive
A hands-on, book-length introduction to the Canvas API and WebGL.
Canvas Handbook
A handy reference for the Canvas API.
The Canvas API is extremely powerful, but not always simple to use. The libraries listed below can make the creation of canvas-based projects faster and easier.
•EaselJS is an open-source canvas library that makes creating games, generative art, and other highly graphical experiences easy.
•Fabric.js is an open-source canvas library with SVG parsing capabilities.
•heatmap.js is an open-source library for creating canvas-based data heat maps.
•JavaScript InfoVis Toolkit creates interactive data visualizations.
•Konva.js is a 2D canvas library for desktop and mobile applications.
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Feb 1, 2011 · The tutorial assumes at least an intermediate level of knowledge of JavaScript. You can first play the game or jump directly to the article and view the source code for the game. Creating the canvas. In order to draw things, we'll need to create a canvas. Because this is a No Tears guide we'll be using jQuery.
Now let’s create our first element, the button. The button is probably the simplest of the ui objects to create, as it has no state. It’s simply a box that when clicked triggers an event. Let’s start with the constructor in the js/button.js file: var Button = function (text, x, y, width, height) { this.x = x; this.y = y; this.width ...
May 5, 2021 · In our scipt.js file, we’ll start by grabbing the canvas element and then getting its context. const canvas = document.getElementById("canvas"); const ctx = canvas.getContext("2d"); The getContext () method returns the context (often abbreviated to “ctx”) and will be the object on which we call all of our different drawing functions.
Apr 25, 2018 · To use TypeScript, we need to first install it, run the following: setup I grabbed from the TypeScript website. Feel free to make any changes to this file. Now, let's create the TypeScript file that will bootstrap our game by loading the CSS and continually re-render/re-paint our game. In the.
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The <canvas>element has a built-in object, called the getContext("2d")object, with methods and properties for drawing. You can learn more about the <canvas>element, and the getContext("2d")object, in our Canvas Tutorial. Get Started. To make a game, start by creating a gaming area, and make it ready for drawing: Example. function startGame() {.
