R有光泽：从输入数据中保存所选择的因子

I have a question regarding R shiny and the observ function. Is it possible to save the selected factors and the state of the work? For Example I created a programm which can choose colnames from the input data. After using bookmark and reopening the programm with the link in the browser the input data are loaded but the select factors of the colnames are reset. But I want to save the chosen colnames. Has anyone an idea? Thank you for your help!I have a question regarding R shiny and the obs