I’ve started using plotly.js but is it sending data to plotly servers? what if my data is confidential and I want to use plotly.js? (there is no way i’m allowed to send data to servers even if its obfuscated this is a go/nogo for me). thanks.
No, unless you click on the “send data to cloud”, an even then the data isn’t saved on our servers. In order to saved the data on our servers, one has to create an account on plot.ly.
Still, if you don’t like that “send data to cloud” button, you can easily remove it. See https://github.com/plotly/plotly.js/issues/316#issuecomment-193440071 for instructions.