Track site visits and time spent on sites #23
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sharon-wang
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src/content_main.js
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| * Get the current time based on the user's timezone. | ||
| */ | ||
| function getCurrentTime() { | ||
| return new Date(); |
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FYI: a more accurate alternative to new Date() for the purposes of timing is performance.now().
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Just a note, new Date() and performance.now() have reduced time precision to protect against attacks.
new Date()
In Firefox, the privacy.reduceTimerPrecision preference is enabled by default and defaults to 20µs in Firefox 59; in 60 it will be 2ms.
performance.now()
In Firefox, the privacy.reduceTimerPrecision preference is enabled by default and defaults to 1ms.
https://developer.mozilla.org/en-US/docs/Web/API/Performance/now#Reduced_time_precision
Although performance.now() has more precision than new Date(), it might be less performant as a result - although its performance seems to be highly dependent on browser. As you can see below, the performance is pretty opposite.
Chrome
Firefox
track time spent on webpage add time spent on site every 2 seconds track number of visits to webpage store date of first visit to webpage store date of most recent visit to webpage Signed-off-by: sharon-wang <sharon-wang-cpsc@outlook.com>
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fixes: #3 , fixes: #7
NOTES
setInterval()seems a bit sketchy