Default: Action is in progress
Indeterminate: The system is currently unable to display action progress
Warning: Total progress is complete but certain actions were not able to be completed
Error: An error has occurred and no actions were completed
1. User Initiated
The progress bar is used for user-initiated actions that take longer than 1 second.¹ ² The progress bar should not be used for content loading. See Loader.
2. Label
The progress bar should include a label that describes the action being performed.
3. Multiple Actions
The progress bar should not be used to communicate the working status of multiple actions at once.
Related Components
Additional Reading
World Leaders in Research-Based User Experience. “Progress Indicators Make a Slow System Less Insufferable.” Nielson Norman Group, https://www.nngroup.com/articles/progress-indicators/.
Best Practices For Animated Progress Indicators https://www.smashingmagazine.com/2016/12/best-practices-for-animated-progress-indicators/
Improving the UX of Progress Indicators and Feedback Notifications https://usersnap.com/blog/progress-indicators/