javascript library for building tree-node hierarchy

I am looking for JavaScript library that can perform the following tasks:

1. Dynamically generate tree (graph-node) (hierarchy structure of data)
2. Can connect nodes together
3. Zoom option for graph area
4. labels for each node

Basically, like familyecho.com? Where can I find a library that has the same functionality? If any of you know any library that can perform all these task, then please do reply me.

You can try infovis: https://philogb.github.io/jit/

Tree example: https://philogb.github.io/jit/static/v20/Jit/Examples/Spacetree/example1.html