fix

src/component/modules/generalMiniCanvas.vue

@@ -164,6 +164,24 @@ export default defineComponent({
 							updateCanvasState('mouseUp')
 						}
 					});
+					canvas.on('mouse:wheel', opt => {
+						
+						const delta = opt.e.deltaY // 滚轮，向上滚一下是 -100，向下滚一下是 100
+						let zoom = canvas.getZoom() // 获取画布当前缩放值
+						zoom *= 0.999 ** delta
+						if (zoom > 20) zoom = 20
+						if (zoom < 0.01) zoom = 0.01
+						// console.log(zoom);
+						canvas.zoomToPoint(
+							{ // 关键点
+							x: opt.e.offsetX,
+							y: opt.e.offsetY
+							},
+							zoom
+						)
+						opt.e.preventDefault()
+						opt.e.stopPropagation()
+					})
 
 					//画布上移动
 					document.addEventListener('mousemove', mouseMove);