Fabric.js是一个在服务器端运行的Node.js扩展模块，用于在Web上绘制各种图形的JS库。
示例代码：
var fabric = require('fabric').fabric, canvas = fabric.createCanvasForNode(200, 200);canvas.add(new fabric.Rect({ top: 100, left: 100, width: 100, height: 50, angle: 30, fill: 'rgba(255,0,0,0.5)'}));var out = require('fs').createWriteStream(__dirname + '/rectangle.png'), stream = canvas.createPNGStream();stream.on('data', function(chunk) { out.write(chunk);});
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