Kent Yao created SPARK-55771:
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Summary: Modernize progress bars using Bootstrap 5 Progress
component
Key: SPARK-55771
URL: https://issues.apache.org/jira/browse/SPARK-55771
Project: Spark
Issue Type: Sub-task
Components: Web UI
Affects Versions: 4.2.0
Reporter: Kent Yao
UIUtils.scala (lines 448-486) and webui.css (lines 111-139) implement custom
progress bars with complex inline styles, vendor prefixes (-moz-, -webkit-,
-o-) for IE9 compatibility, and custom gradients.
Replace with Bootstrap 5 Progress component:
- Remove IE9 vendor prefix CSS (~30 lines in webui.css)
- Simplify inline style generation in UIUtils.scala
- Keep custom colors (progress-completed #3EC0FF, progress-started #A0DFFF) as
CSS custom properties
- Use BS5 progress-bar with aria-valuenow for better accessibility
Part of SPARK-55760 (Spark Web UI Modernization)
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