[feat][TextAlignment] Adds text alignment parameter to st.text#13032
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sfc-gh-lwilby merged 1 commit intodevelopfrom Nov 19, 2025
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[feat][TextAlignment] Adds text alignment parameter to st.text#13032sfc-gh-lwilby merged 1 commit intodevelopfrom
st.text#13032sfc-gh-lwilby merged 1 commit intodevelopfrom
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This was referenced Nov 18, 2025
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📈 Python coverage change detectedThe Python unit test coverage has increased by 0.0495%
🎉 Great job on improving test coverage! Coverage by files
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Pull Request Overview
This PR adds a text_alignment parameter to st.text, allowing users to align text horizontally within the element using "left" (default), "center", "right", or "justify" options.
Key Changes
- Added
text_alignmentparameter to thest.textPython API with validation - Updated frontend styling to support inline help icons with text alignment
- Added comprehensive Python unit tests and E2E tests with snapshot testing
Reviewed Changes
Copilot reviewed 9 out of 21 changed files in this pull request and generated 1 comment.
Show a summary per file
| File | Description |
|---|---|
| lib/streamlit/elements/text.py | Added text_alignment parameter to st.text() method signature and documentation |
| lib/tests/streamlit/elements/text_test.py | Added parameterized tests for text alignment validation and protobuf value checking |
| frontend/lib/src/components/elements/TextElement/TextElement.tsx | Updated to nest help icon inside text span for proper alignment |
| frontend/lib/src/components/elements/TextElement/styled-components.ts | Changed from div to span for inline display and added inline help icon styling |
| frontend/lib/src/components/shared/TooltipIcon/styled-components.ts | Updated to ensure full width and proper centering for text alignment |
| frontend/lib/src/components/shared/TooltipIcon/index.ts | Reordered exports (cosmetic change) |
| e2e_playwright/st_text.py | Added test cases for all text alignment options with help tooltips |
| e2e_playwright/st_text_test.py | Added parameterized E2E test for visual validation of text alignment |
| e2e_playwright/shared/app_utils.py | Added get_text() utility function for locating text elements |
| e2e_playwright/snapshots/* | Added snapshot images for alignment validation across browsers |
lukasmasuch
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Nov 19, 2025
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is the space in front of demonstrate expected? This is probably caused by the tab/spaces in front of demonstrate
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Describe your changes
Adds a new
text_alignmentparameter tost.text.GitHub Issue Link (if applicable)
#4109
Testing Plan
Contribution License Agreement
By submitting this pull request you agree that all contributions to this project are made under the Apache 2.0 license.