It is not difficult for d3.js to draw a vector chart. it is difficult to drag and drop it. In fact, jquery and easyui both provide the draggable drag and drop method, you only need to re-draw the line when dragging the drop event of a div. It is not difficult for d3.js to draw a vector chart. it is difficult to drag and drop it. In fact, jquery and easyui both provide the draggable drag and drop method, you only need to re-draw the line when dragging a p drop event to execute it. it is too simple to implement it. it is very nice to use it as a code generator, report tool, or workflow !!! I can also integrate it into my easydragger open-source software to form a new and more powerful product. birds can't fly without wings, and cars can't run without wheels, the code designer does not have a vector graph, which is garbage and cannot direct to the human brain's cognitive system. I hope you can complete it and then download it for use. Next, drag and drop. Pray. The world will be peaceful.