Consider using the data-sharer attribute as the selector instead of class .sharer

[soluml]

Changing L27 from var elems = document.querySelectorAll('.sharer'), to var elems = document.querySelectorAll('[data-sharer]'), relieves users from having to add a sharer class to any element they want to act as a share button.

data-sharer is a required attribute for all social sharing anyway, so it can be used to kill two birds with one stone here.

[ellisonleao]

nice idea @soluml ! Will check it soon. Thanks for the tip