NGX-Diagrams 
Light Weight, Modular, Typed Diagram Engine for Angular
Near zero dependency and a complete customizable diagram engine makes NGX-Diagrams the perfect fit to any project.
NGX-Diagrams is a diagrams engine system, built on top of Angular and RxJS, which takes the idea of graphic visualization to the next level in terms of performance, rendering optimization, and customizability.
NGX-Digrams encourages creativity. It allows you to create any node, link, label, or even a custom entity and provide powerful tools with a moderate learning curve, suitable for both experienced and inexperienced developers alike.