The CSS easing animation to use. Default is 'ease'.
The minimum progress percentage. Default is 0.08.
Whether to show the spinner. Defaults to true. Default is true.
The animation speed in milliseconds. Default is 200.
The HTML markup inserted for the progress indicator. To keep the progress bar working, keep an element with role='bar' in there.
Whether to enable trickling the progress. Default is true.
How much to increase per trickle. Example: .02. Default is true.
How often to trickle, in milliseconds. Default is 800.