This is really lightweight and easy!
First we add the script source to our project, before the</body> tag.
* if we want the plugin to work on the entire website we add it in the project's settings under custom code. otherwise we can add it on the page's custom code section.
2nd step is to add the code that triggers the plugin. We should add this right after the previous code.
Some options are available, like icon color, background color, which elements can be selected and Facebook share (needs additional code).
var sharect = new Sharect();
That is about it!
Depending on your page structure, the plugin might be hidden under a higher z-indexed layer, so add this to your <head> tag: