One thing I'm curious about is how do you get the data to the browser. Particularly if you are interested in doing it in a low latency way with frequent data up

One thing I'm curious about is how do you get the data to the browser. Particularly if you are interested in doing it in a low latency way with frequent data updates? For instance what do I need to do if I want to have a chart of timeseries data that is being updated in near realtime, say every 5 seconds, appear on a webpage? In my Org data originates from Operational Historians which are essentially ring buffers for time series data and look a lot like SQL databases. How does javascript communicate with this sort of data efficiently. In "old school" Non live updating R world I would use a JDBC connection. What is javascript way of receiving the data?