Exporting plot datapoints

Is there a facility to export trace datapoints from plotly.js?

The user case is to export the current chart data and save it to a persistent context. Then if there is a power failure, or system reboot, then the data can be fed back into the chart to redraw it (at the point in which it was last saved).

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Any help would be appreciated please.

I can export the data when using ‘bulk data’ (ie, arrays of data & corresponding timestamps) are being used, but when for example; a single value is being input every 10 seconds, and plotted against a timestamp, so I have a trace of 100 points. How do I retrieve those 100 datapoints & timestamps?