修改library里面的sketch的generate

src/tool/canvasGeneral.js

@@ -82,6 +82,9 @@ class myCanvas {
 			width: val.width?val.width:this.canvasDomParent.getBoundingClientRect().width,
 			height: val.height?val.height:this.canvasDomParent.getBoundingClientRect().height,
 			isDrawingMode: val.isDrawingMode, // 开启绘图模式
+			selectionFullyContained: true,
+			selectionKey:'ctrlKey',
+			includeDefaultValues: false,//尚未测试 精简导出JSON
 		});
 
 		if(!fabric.Object.prototype.controls.deleteControl){//设置元素删除