author(s): Øystein Moseng
jQuery 1.9.1, HTML, CSS, JavaScript
author(s): Torstein Hønsi
jQuery 1.7.2, HTML, CSS, JavaScript
Added bit of code to put tooltop on left/right of dot depending on which half of the chart the dot falls in
https://blog.hubspot.com/website/html-tooltip
No-Library (pure JS), HTML, CSS, JavaScript
jQuery Slim 3.2.1, HTML, CSS, JavaScript