We have this issue filed against the treeTable JavaScript library to add support for ajax on-demand loading of children of parent rows. It would be good if we could have people help by cloning that Github project and providing a pull request to support jQuery ajax loading for children.
Needs work
1.0
User interface
It affects performance. It is often combined with the Needs profiling tag.
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It's likely this issue predates Contrib.social: some issue and comment data are missing.
Considering the fact that there are other issues related like 🐛 Unable to explore tokens Needs work and that Fast Token Browser is not usable in D8 (see #3054481: Port Fast Token Browser to Drupal 8 → ), might it be time for this issue to change to the D8 version? And if we prefer this to still exist as a separate module, then let's focus our efforts there.