A simple vanilla javascript plugin to track scroll depth. A lot of this was borrowed from @robflaherty. I needed a stripped-down version that didn't require jQuery as a dependency.
Tested on: Chrome, Firefox, Safari, IE7-11
To initialize:
<script> var foo = ScrollDepth(); </script>
Currently I'm logging (console.log):
- baseline - fired when plugin loads
- scrolled 25%
- scrolled 50%
- scrolled 75%
- scrolled 100%
You can drop-in any analytics code in place of the console.log.