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Description
Ik have a web application (Header, footer, left menubar) which loads a lot of .js and .css files by default.
I want to use Timeline in one of these pages. By default, this works fine. However when I use nested groups it becomes a mess.
I copy the same code: https://visjs.github.io/vis-timeline/examples/timeline/groups/nestedGroups.html into my application. When I launch the page "John" is not shown. Clicking on "Lee" to collapse suddenly show "John". Clicking on "Lee" again makes "Lee" totally disappear.
You see, a complete mess. Possible because the loading of vis css or js in the wrong order or some position problems.
Probably not a vis.js bug but a combination problem. Is there any way to avoid this behavior?