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Wow I really like it! Can you maybe break down some of the design decisions you've made building this? I'm especially interested in choosing full svg, svg for just the lines and the rest with divs or using canvas.

Also I see you depend on d3, where do you use it for?

I did a lot of data visualizations and I am big fan of d3. It's very robust software that works in all browsers. We are using d3-zoom for panning and zooming the pan but I am actually looking for an alternative to decrease the size of react flow. Maybe we will use this in the future https://github.com/anvaka/panzoom

I also wondered why mix divs and svg rather than doing it all in SVG? or all in HTML? although it seems to position and resize just fine

Looks cool. Looks similar to dynamo. https://dynamobim.org/

I'm curious if that's your inspiration.

That's cool. It's a little like Apache Airflow's UI.

(Edit: is it Airflow?)