Feature request : Something like the D3 Collapsible Tree

[t829702]

Is your feature request related to a problem? Please describe. when it's growing to hundreds or even more nodes, it would be nice to have a UI control to collapse or expand any non-leaf nodes

Describe the solution you'd like Something like the D3 Collapsible Tree https://observablehq.com/@d3/collapsible-tree

[t829702]

I've just found the 折叠 in the right click menu, but this is not very intuitive, hope it can be better like: when mouse hover'ing any node, it can show a mini button around / floating or somehow, be more invisible; the right click context menu was designed for desktop applications, not so popular on a web app, and not there on a touch screen systems...

and when the whole mindmap has hundreds or thousands of nodes, can the initial showing have a parameter to control how many nodes (or how many levels from center) to be in 展开 and other leaf nodes be in 折叠 at the beginning?