Streamlit 1.56.0 release notes and custom components link fix (#1455)

* Add 2026 to older release notes links on changelog page

Made-with: Cursor

* Add Streamlit 1.56.0 release notes and keep changelog index to latest only

- Document 1.56.0 on the main release notes page with prior versions linked below.
- Add the same 1.56.0 section to 2026.md; full 1.55.0 text remains on the year page.

Made-with: Cursor

* Fix Components v2 card link on custom components overview

Made-with: Cursor

---------

Co-authored-by: Johannes Rieke <johannes.rieke@gmail.com>

Author: sfc-gh-jrieke

content/develop/concepts/custom-components/_index.md

@@ -21,7 +21,7 @@ Learn what custom components are, when to use them, and understand the differenc
 
 </RefCard>
 
-<RefCard href="/develop/concepts/custom-components/v2">
+<RefCard href="/develop/concepts/custom-components/components-v2">
 
 <h4>Components v2</h4>
 

content/develop/quick-references/release-notes/2026.md

@@ -9,6 +9,61 @@ keywords: changelog, release notes, version history
 
 This page contains release notes for Streamlit versions released in 2026. For the latest version of Streamlit, see [Release notes](/develop/quick-reference/release-notes).
 
+## **Version 1.56.0**
+
+_Release date: March 31, 2026_
+
+**Highlights**
+
+- 🍿 Introducing [`st.menu_button`](/develop/api-reference/widgets/st.menu_button) — a new widget that renders a dropdown button with a customizable popover container for building menus, toolbars, and action lists ([#13981](https://github.com/streamlit/streamlit/pull/13981), [#11409](https://github.com/streamlit/streamlit/issues/11409)).
+- 🎁 Introducing [`st.iframe`](/develop/api-reference/media/st.iframe) — embed external URLs or raw HTML content directly in your app using an iframe ([#14433](https://github.com/streamlit/streamlit/pull/14433), [#12977](https://github.com/streamlit/streamlit/issues/12977)).
+- 🔍 [`st.selectbox`](/develop/api-reference/widgets/st.selectbox) and [`st.multiselect`](/develop/api-reference/widgets/st.multiselect) now support a `filter_mode` parameter that lets users search and filter options by typing ([#14537](https://github.com/streamlit/streamlit/pull/14537), [#6160](https://github.com/streamlit/streamlit/issues/6160), [#7238](https://github.com/streamlit/streamlit/issues/7238)).
+
+**Notable Changes**
+
+- 📊 [`st.dataframe`](/develop/api-reference/data/st.dataframe) supports programmatically setting selections via the `selection` parameter ([#13594](https://github.com/streamlit/streamlit/pull/13594), [#10128](https://github.com/streamlit/streamlit/issues/10128)).
+- 🎯 `st.dataframe` has a new `"single-row-required"` selection mode that always keeps exactly one row selected ([#14288](https://github.com/streamlit/streamlit/pull/14288), [#9253](https://github.com/streamlit/streamlit/issues/9253)).
+- 📐 [`st.dataframe`](/develop/api-reference/data/st.dataframe) column configuration now supports an `alignment` parameter for controlling text alignment in columns ([#14333](https://github.com/streamlit/streamlit/pull/14333), [#12106](https://github.com/streamlit/streamlit/issues/12106)).
+- 👀 The column visibility menu in `st.dataframe` is now always visible, making it easier to show and hide columns ([#14336](https://github.com/streamlit/streamlit/pull/14336), [#10649](https://github.com/streamlit/streamlit/issues/10649)).
+- 🎹 `AudioColumn` and `VideoColumn` are now available in [`st.column_config`](/develop/api-reference/data/st.column_config) for displaying audio and video players directly in dataframes ([#14032](https://github.com/streamlit/streamlit/pull/14032), [#8345](https://github.com/streamlit/streamlit/issues/8345)).
+- 🐍 Streamlit now supports pandas 3.x ([#13812](https://github.com/streamlit/streamlit/pull/13812), [#13211](https://github.com/streamlit/streamlit/issues/13211)).
+- 🧭 [`st.navigation`](/develop/api-reference/navigation/st.navigation) has a new `expanded` parameter to control how many sidebar items are visible before collapsing ([#14051](https://github.com/streamlit/streamlit/pull/14051), [#9646](https://github.com/streamlit/streamlit/issues/9646)).
+- 🔗 [`st.Page`](/develop/api-reference/navigation/st.page) now accepts external URLs, allowing you to add links to external sites in the navigation sidebar ([#13691](https://github.com/streamlit/streamlit/pull/13691), [#9025](https://github.com/streamlit/streamlit/issues/9025)). Thanks, [t0k0shi](https://github.com/t0k0shi)!
+- 🖼 [`st.table`](/develop/api-reference/data/st.table) has new `hide_index` and `hide_header` parameters for cleaner table presentation ([#14113](https://github.com/streamlit/streamlit/pull/14113), [#8235](https://github.com/streamlit/streamlit/issues/8235), [#9251](https://github.com/streamlit/streamlit/issues/9251)).
+- ⚡ [`st.link_button`](/develop/api-reference/widgets/st.link_button) now supports an `on_click` callback that triggers a rerun before navigating ([#14116](https://github.com/streamlit/streamlit/pull/14116), [#7453](https://github.com/streamlit/streamlit/issues/7453)).
+- 📁 [`st.file_uploader`](/develop/api-reference/widgets/st.file_uploader) and [`st.chat_input`](/develop/api-reference/chat/st.chat_input) now accept file type shortcuts like `"image"`, `"audio"`, `"video"`, and `"document"` ([#14140](https://github.com/streamlit/streamlit/pull/14140)).
+- 📏 `st.chat_input` has a new `height` parameter to control the initial height of the text area ([#14165](https://github.com/streamlit/streamlit/pull/14165), [#10724](https://github.com/streamlit/streamlit/issues/10724)).
+- ✨ Alert elements (`st.info`, `st.warning`, `st.error`, `st.success`) now automatically extract a leading Material icon from the message body and display it as the alert icon ([#14173](https://github.com/streamlit/streamlit/pull/14173), [#10892](https://github.com/streamlit/streamlit/issues/10892)).
+- 🪄 Streaming markdown now auto-completes incomplete syntax (e.g., unclosed bold, links, or code blocks) during streaming for a cleaner reading experience ([#13939](https://github.com/streamlit/streamlit/pull/13939)).
+- 🏷 [`st.pills`](/develop/api-reference/widgets/st.pills) and [`st.segmented_control`](/develop/api-reference/widgets/st.segmented_control) now have a `required` parameter to enforce that at least one option is always selected ([#14414](https://github.com/streamlit/streamlit/pull/14414), [#9870](https://github.com/streamlit/streamlit/issues/9870)).
+- 🔄 [`st.container`](/develop/api-reference/layout/st.container) has a new `autoscroll` parameter that automatically scrolls to the bottom as new content is added ([#14502](https://github.com/streamlit/streamlit/pull/14502), [#8836](https://github.com/streamlit/streamlit/issues/8836)).
+- 🧩 `st.tabs`, `st.expander`, and `st.popover` now preserve their open/closed state across reruns ([#14332](https://github.com/streamlit/streamlit/pull/14332), [#14356](https://github.com/streamlit/streamlit/pull/14356)).
+- 🛠 Static files served via `st.static/` now use native content types instead of a generic fallback ([#14090](https://github.com/streamlit/streamlit/pull/14090)).
+- 🎥 Media elements now support relative static file serving URLs (e.g., `/app/static/video.mp4`) ([#14317](https://github.com/streamlit/streamlit/pull/14317), [#12104](https://github.com/streamlit/streamlit/issues/12104)).
+- 🧪 `st.file_uploader` is now supported in AppTest for programmatic testing of file upload flows ([#14341](https://github.com/streamlit/streamlit/pull/14341), [#8093](https://github.com/streamlit/streamlit/issues/8093)).
+- 🔧 Widget state duplication warnings are now logged to the console instead of displayed in the app UI ([#14141](https://github.com/streamlit/streamlit/pull/14141)).
+- 📦 `BidiComponentResult` has been renamed to `ComponentResult` in the custom components v2 API ([#14253](https://github.com/streamlit/streamlit/pull/14253)).
+- ⚙ The `_stcore/metrics` endpoint is now fully OpenMetrics-compliant ([#14538](https://github.com/streamlit/streamlit/pull/14538)).
+
+**Other Changes**
+
+- 🐛 Bug fix: Streamlit can now run with Python optimization flags (`-O` / `-OO`) ([#14171](https://github.com/streamlit/streamlit/pull/14171), [#14155](https://github.com/streamlit/streamlit/issues/14155)).
+- 🦋 Bug fix: Reduced false-positive file change detections on Windows by adding a stability check to the file watcher ([#14174](https://github.com/streamlit/streamlit/pull/14174), [#13954](https://github.com/streamlit/streamlit/issues/13954)).
+- 🪲 Bug fix: `st.text_area` with `height="content"` now correctly auto-sizes to fit content ([#14228](https://github.com/streamlit/streamlit/pull/14228), [#14222](https://github.com/streamlit/streamlit/issues/14222)).
+- 🐜 Bug fix: Stale anchor links are no longer preserved when clearing transient nodes ([#14251](https://github.com/streamlit/streamlit/pull/14251), [#14249](https://github.com/streamlit/streamlit/issues/14249)).
+- 🐝 Bug fix: `BidiComponentManager` is now properly initialized in AppTest mock runtime ([#14301](https://github.com/streamlit/streamlit/pull/14301), [#14274](https://github.com/streamlit/streamlit/issues/14274)). Thanks, [tysoncung](https://github.com/tysoncung)!
+- 🐞 Bug fix: Streamlit is now compatible with Python 3.14's PEP 649 deferred annotation evaluation ([#14327](https://github.com/streamlit/streamlit/pull/14327), [#14324](https://github.com/streamlit/streamlit/issues/14324)).
+- 🕷️ Bug fix: Tooltips on selected `st.multiselect` options are now restored ([#14353](https://github.com/streamlit/streamlit/pull/14353), [#14351](https://github.com/streamlit/streamlit/issues/14351)).
+- 🪳 Bug fix: `server.port` is now correctly updated after binding to port 0 ([#14372](https://github.com/streamlit/streamlit/pull/14372), [#11308](https://github.com/streamlit/streamlit/issues/11308)). Thanks, [joanaarnauth](https://github.com/joanaarnauth)!
+- 🪰 Bug fix: Bound query params are now correctly restored in the URL when navigating in multi-page apps ([#14374](https://github.com/streamlit/streamlit/pull/14374), [#14350](https://github.com/streamlit/streamlit/issues/14350)).
+- 🦠 Bug fix: Restored the `reactJsonViewCompat` shim for the local dev server ([#14391](https://github.com/streamlit/streamlit/pull/14391)).
+- 🦟 Bug fix: `st.exception` links no longer overflow their container at small viewport widths ([#14417](https://github.com/streamlit/streamlit/pull/14417), [#12870](https://github.com/streamlit/streamlit/issues/12870)).
+- 🦂 Bug fix: Headings inside horizontal containers (`st.columns`) no longer have extra top padding ([#14419](https://github.com/streamlit/streamlit/pull/14419), [#12434](https://github.com/streamlit/streamlit/issues/12434)).
+- 🦗 Bug fix: Programmatic dataframe selections now return `AttributeDictionary` for consistent dot-notation access ([#14455](https://github.com/streamlit/streamlit/pull/14455), [#14454](https://github.com/streamlit/streamlit/issues/14454)).
+- 🕸️ Bug fix: Streaming markdown with color directives no longer shows rendering artifacts ([#14468](https://github.com/streamlit/streamlit/pull/14468), [#14460](https://github.com/streamlit/streamlit/issues/14460)).
+- 🐌 Bug fix: The `session_duration` metric is now OpenMetrics-compliant ([#14476](https://github.com/streamlit/streamlit/pull/14476), [#14432](https://github.com/streamlit/streamlit/issues/14432)).
+- 🦎 Bug fix: The main menu now has a visible border in dark mode ([#14529](https://github.com/streamlit/streamlit/pull/14529)).
+
 ## **Version 1.55.0**
 
 _Release date: March 3, 2026_