Is there a js library or plugin for generating a diagram of some process in the form of blocks and lines connecting them?

Question

JavaScript

Greetings.
Is there a js library or plugin for generating a diagram of some process in the form of blocks and lines connecting them? Moreover, it should be possible to change the position of the blocks by dragging the mouse.
In principle, you can do it yourself, but why make a bike if you already have it.
Thank you.

Answer 1

raphaeljs.com
There's a lot of good stuff there. By the way, there was an article on the hub.

Answer 2

d3js , for example, once and twice , but I didn’t find your task ready. Look.