PS2013 App: How to read and update timephased data with JSOM (JavaScript CSOM)

Hello group,

I need advice on how to read and update timephased data of assignments with Javascript (JSOM) inside an App for Project Server 2013. A sample with CSOM in C# is also very appreciated, I assume it can be converted to JSOM then.

There is the PS namespace from file PS.js (or PS.debug.js). The MSDN library does not have any hints.

Thanks!