[AdvancedLayouts] Add height to st.altair_chart#12630
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sfc-gh-lwilby merged 3 commits intodevelopfrom Sep 25, 2025
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- Adds height parameter using Height type system for consistency - Includes E2E tests for visual height behavior validation - Updates backend implementation with native chart height support - Adds comprehensive unit tests for height parameter functionality
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Describe your changes
Adds a new
heightparameter tost.altair_chartusing theHeighttype system ("stretch","content", or pixel values) for consistency with other chart elements.Changes Made:
height: Height = "content"parameter tost.altair_chartheight="content"(default): Respects Altair chart's native height if specified in chart propertiesheight="stretch": Expands to fill the parent container's heightheight=<integer>: Sets fixed pixel heightKey Implementation Details:
Height Parameter Addition:
heightparameter with defaultheight="content"height="content"extracts height from native Altair chart object if availableheight="stretch"properly fills parent containers (tested in 500px container)GitHub Issue Link (if applicable)
Part of the AdvancedLayouts initiative
Testing Plan
height="content")height=250)height="content"with chart spec height=180)height="stretch"in 500px container)Screenshots/Demos:
(E2E test snapshots show visual differences for all height behaviors: fixed pixels, content-based, and container stretching)
Additional Notes:
This extends the AdvancedLayouts initiative by adding height support to
st.altair_chart, bringing it in line with other chart elements that support theHeighttype system. The default ofheight="content"ensures backward compatibility while enabling users to override with"stretch"for responsive designs or specific pixel values for fixed layouts.Contribution License Agreement
By submitting this pull request you agree that all contributions to this project are made under the Apache 2.0 license.