.progress as a wrapper to indicate the max value of the progress bar.
.progress-bar to indicate the progress so far.
.progress-bar requires an inline style, utility class, or custom CSS to set their width.
.progress-bar also requires some role and aria attributes to make it accessible.
.progress-bar
.progress-bar-striped to any .progress-bar to apply a stripe via CSS gradient over the progress bar’s background color.