1) I'm aware about the license wall, that's why I asked about how to do it with your HTML library, I wish you answered me something else than do it by yourself, as I never used JS nor Java.
2) Even If I can evaluate it freely, 9900€ is way too much for avoiding the process of load the file from yED, then export it as PDF, which takes like 15 seconds... Especially if what I need is not even explicitly explained in your docs.
It would litteraly cost me less to pay experienced developpers to reverse-engeeneiring your code and add this feature. This is absurd.
I'm okay with paying an affordable price for a command line option or a web api.
Plus I found a lot of questions/request about the same feature, why don't listen to the people who are ready to buy for your products?
You only provide user-friendly interface or experienced developper api, there is people stuck between it.