[alexh1]

Anyone have insight into how they built this? Custom Gantt solution or you think they bought one?

There are no good and free JS gantt libraries, but many, many paid ones. I've been trying to find a good one for Portabella (https://portabella.io) as they're an essential part of project management platforms, but no luck yet.

[jitl]

We build this ourselves. It's React with little in the way of 3rd-party "magic".

[uyt]

I also needed something similar but instead of a lack of libraries, I actually remember seeing an overwhelming amount of choices. There are 200+ libraries with the word gantt in it: https://www.npmjs.com/search?q=gantt&ranking=popularity. And a lot more if you also include calendar timelines like https://github.com/namespace-ee/react-calendar-timeline.

Did you evaluate them and consider all of them to be bad? I ended up building my own because everything looked too flexible for my use case. I only needed basic layout/time tick marks and zoom/pan.

[daltonlp]

You're right, there are no good and free JS libraries for gantt charts (or even timelines). It is a non-trivial problem domain.

I know, because I helped build a product (https://peachyplan.com) much like Notion's timeline view :)

The notion team did a phenomenal job. This is one of the best timeline views I've seen, and I've looked at hundreds.

[ConcernedCoder]

we use https://www.bryntum.com/

[dbbk]

Obviously they built it, it's really not hard

[the_arun]

We use smartsheets. It has Gantt chart