JavaScript 画布对象
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JavaScript Canvas object
提问by Get Off My Lawn
I want to create a canvas object in memory, and not require a HTML <canvas>tag. Is this possible?
我想在内存中创建一个画布对象，并且不需要 HTML<canvas>标签。这可能吗？
With this code:
使用此代码：
var canvas = new Canvas();
var ctx = canvas.getContext('2d');
I get this error message: Uncaught ReferenceError: Canvas is not defined
我收到此错误消息： Uncaught ReferenceError: Canvas is not defined
回答by ryanbrill
You should be able to create the element with JavaScript:
您应该能够使用 JavaScript 创建元素：
var canvas = document.createElement('canvas');
var ctx = canvas.getContext('2d');
回答by Bergi
Use document.createElement("canvas")instead. There is no Canvasconstructor for canvases, as you know it from Imagefor images or Optionfor options - those are the sole exceptions.
使用document.createElement("canvas")来代替。画布没有Canvas构造函数，正如您从图像或选项中知道的那样- 这些是唯一的例外。ImageOption
