* (Internal) Gets a space separated list of the class names on the element. * The list is wrapped with a single space on each end to facilitate fi

* (Internal) Determines if an element or space separated list of class names contains a class name.

* (Internal) converts a percentage (`0..1`) to a bar translateX * percentage (`-100%..0%`).

* (Internal) Adds a class to an element.

* (Internal) returns the correct CSS for changing the bar's * position given an n percentage, and speed and ease from Settings

* Helpers

* (Internal) Removes a class from an element.

* (Internal) Removes an element from the DOM.