site/static/js/pageview_timer.js

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JavaScript
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/*
Hi,
If you are reading this, you have found this script in the referenced scripts
for pages on this site. I know you're gonna have to take me at my word on this,
but I'm literally using this to collect how much time people spend reading my
webpages. See metrics here: https://christine.website/metrics
If you have the "do not track" setting enabled in your browser, this code will
be ineffectual.
*/
(function() {
let dnt = navigator.doNotTrack;
if (dnt === "1") {
return;
}
let startTime = new Date();
function logTime() {
let stopTime = new Date();
window.navigator.sendBeacon("/api/pageview-timer", JSON.stringify({
"path": window.location.pathname,
"start_time": startTime.toISOString(),
"end_time": stopTime.toISOString()
}));
}
window.addEventListener("pagehide", logTime, false);
})();