Javascript variable export to python

Question

Quick question. Can i somehow access javascript variable inside script and then use it to make python graphs?

i got javascript script running on my website, i need to "export" variables inside script after leaving website, then use it in python script running somewhere else. My site is basic html page collecting data about its usage.

window.onload = function(){
 var heatmapInstance = h337.create({
 container: document.querySelector('.heatmap'),
 radius: 90
 });
 document.querySelector('.heatmap').onmousemove = function(ev) {
 heatmapInstance.addData({
 x: ev.layerX,
 y: ev.layerY,
 value: 1
 });
 };
 }
 function getHeatMap() {
 var currentData = heatmapInstance.getData();
 return currentData;
 }

Answer 1

You can use the beacon API to flush data when users close the tab, in supported browsers, to your back-end.

window.onload = window.onunload = function analytics(event) {
 if (!navigator.sendBeacon) return;
 var url = "https://example.com/analytics";
 // Create the data to send
 var data = "state=" + event.type + "&location=" + location.href;
 // Send the beacon
 var status = navigator.sendBeacon(url, data);
 // Log the data and result
 console.log("sendBeacon: URL = ", url, "; data = ", data, "; status = ", status);
};