JointJS is quite great for that: https://www.jointjs.com https://www.jointjs.com, even with the community version https://www.jointjs.com/comparison https://www

JointJS is quite great for that: https://www.jointjs.com https://www.jointjs.com, even with the community version https://www.jointjs.com/comparison https://www.jointjs.com/comparison => we have built some node ui with it and it has been fast, flexible and extensible; maybe not easy to start with, but it was worth it