[rlkf]

Draw.io is quite good, and it is made without using any frameworks. Alas, the source code is not open to learn from.

<https://www.quora.com/What-is-the-tools-and-languages-used-i...>

[BrouteMinou]

> source code is not open

What about this: https://github.com/jgraph/drawio

[rlkf]

> What about this: https://github.com/jgraph/drawio

That repository only contains the minified code, not the original source.

[BrouteMinou]

Holy shit dude, all those years I was dead sure it was open source and all.

Like a "proof that open source is working", a show case of a good quality, open source project.

Oh well, time to strike that one off the list.