Interactive web-based application development technology enables client to submit inquiry and to obtain response from server immediately. It would be helpful if graphical and text data visualization can be driven by client access on a certain data. In common, a single web application which provided by web server, can be accessed by many clients" browsers concurrently. However, all these accesses are usually independent access, unrelated among clients. In concurrent access, each session uses and interacts with same dataset, and the sessions may work on different subset of the dataset, as independent concurrent sessions. In this paper, the concurrent sessions are achieved by utilizing collaborative works, which is called as inter session communication. This experiment is part of IoT server capabilities to display the results of open-source machine learning as a microservice. One session works on part of subset data, and other sessions work on overlapping, or on different subset of the dataset. These all concurrent sessions represent as one bigger workspace.