dagre is a lightweight JavaScript library that automatically computes layouts for directed (node‑edge) graphs on the client side. It’s aimed at developers and designers who need to visualize hierarchical or flow‑chart‑style data structures—such as dependency graphs, service maps, or state diagrams—without building a layout engine from scratch. The library is distributed via npm (the actively maintained @dagrejs/dagre package) and can be used in web or Node.js environments to position nodes and edges for clean, readable diagrams.