How long ago did I load a page?
javascript, time
Solution
You could use `window.performance.timing.loadEventEnd`:
> performance.timing.loadEventEnd
1424280020354
`window.performance.timing` provides timestamps for the following page load lifecycle events, in order:
- navigationStart
- unloadEventStart
- unloadEventEnd
- redirectStart
- redirectEnd
- fetchStart
- domainLookupStart
- domainLookupEnd
- connectStart
- connectEnd
- secureConnectionStart
- requestStart
- responseStart
- responseEnd
- domLoading
- domInteractive
- domContentLoadedEventStart
- domContentLoadedEventEnd
- domComplete
- loadEventStart
- loadEventEnd
Source: Navigation Timing API on MDN
The Navigation Timing API is currently supported by most modern browsers. Exceptions: Safari < 8 on OSX, Safari on iOS and Opera Mini. - caniuse.com.
Problem
Is there a way to get how long ago a page was loaded using javascript, without having first recorded the time to a javascript variable on page load? I'm hoping to create a scriptlet (javascript bookmark) that I can run on any web page and have it output how much time has passed since the browser loaded the page. All of the "time spent on a page" solutions I've found so far rely on recording the time when the page first loads, which requires either access to modify a site, or a browser plugin. Is there no document property that stores when the page was loaded (started, finished, etc.) which can be accessed in javascript?