Version 1.52.0

[mathcatsand]

Highlights

• Introducing st.datetime_input to set date and time in a single widget.

• To avoid blocking your script, you can pass a callable to st.download_button for on-demand download generation (#12942, #5053).

• st.chat_input can optionally accept audio input (#12836, #13054).

Notable Changes

• You can configure keyboard shortcuts for buttons (#12975, #1291).

• You can now pass query parameters to st.switch_page and st.page_link (#13027, #8102, #8112, #13093).

• st.html has a new unsafe_allow_javascript parameter to execute JavaScript (#12918).

• st.metric has a new delta_arrow parameter to configure the visibility and orientation of the delta arrow (#12982, #4775).

• You can configure the horizontal alignment of st.markdown, st.caption, st.title, st.header, st.subheader, and st.text with a new text_alignment parameter (#13032, #4109, #13034, #13036).

• You can use a spinner everywhere you can set an icon and in the avatar parameter of st.chat_message. The spinner can’t be used as a page favicon (#13045, #6415).

• You can now add tooltips to st.badge (#12897, #12878). Thanks, marcolanfranchi!

• You can configure placeholder text for null values in st.dataframe and st.data_editor with a new placeholder parameter (#12968, #7360).

• To prevent widgets from resetting when you change a parameter, widgets are transitioning to an identity based only on their keys (if provided). The following widgets use only their key for their identity:

  • st.file_uploader

  • st.camera_input

• st.plotly_chart has a height parameter to use with flex containers (#12593).

• ↔️ st.container, st.dataframe, and st.data_editor support width="content" (#12848, #12875, #12391).

• Streamlit supports Python 3.14 and Vega-Altair 6!

• st.bokeh_chart has been removed. Use the streamlit-bokeh custom component instead.

• **kwargs is deprecated in st.vega_lite_chart (#13141).

• The .add_rows() method is under consideration for removal. Please leave feedback (#13063).

• We’re improving community contributions by using a public workflow for discussing feature specs (#12248).

Other Changes

• For better performance, Streamlit uses uvloop if it’s installed (#13047).

• For improved performance, Markdown plugins are lazy loaded (#13152).

• To improve load times, we reduced the bundle size (#13071, #13077, #13099, #13115, #13128).

• To improve performance, we’ve refactored session context data (#12788, #12789, #12790, #12791).

• The hovering performance of st.line_chart was improved (#13156, #13154).

• st.metric was optimized to prevent poor hovering performance with large data sets (#12983).

• The packaging Python dependency is no longer version-capped (#13073).

• For clarity, Streamlit logs a warning if you try to hide a non-range index when using st.data_editor with num_rows="dynamic". A non-range index must be editable to add rows (#12978, #8263).

• Bug fix: Streamlit auth raises a warning instead of an error when browser back navigation revisits a consumed OAuth callback (#13127, #13101).

• Bug fix: The WebSocket timeout was increased on Android to improve st.file_uploader performance (#13132, #11419).

• Bug fix: Query parameters are preserved when using browser back and forward navigation (#13129, #9279).

• Bug fix: For custom components v2, the frontend key is correctly computed to be stable if it has a key in Python and otherwise change when its parameters change (#12950).

• Bug fix: Empty code blocks in Markdown don’t display “undefined” (#13074, #12986). Thanks, ashm-dev!

• Bug fix: st.feedback is prevented from wrapping (#12970, #12068).

• Bug fix: Custom components v2 don’t raise a warning when placeholders are replaced as a result of the initial manifest scan (#13043, #13042).

• Bug fix: st.audio_input has the correct padding for its waveform (#13010).

• Bug fix: The date and time icons in st.data_editor are visible in dark mode (#12994, #12852). Thanks, aritradhabal!

• Bug fix: st.pills and st.segmented_control wrap correctly when width="content" (#12969, #12067, #12879, #12857).

• Bug fix: st.color_picker has a minimum width to prevent a pixel width below its intrinsic size (#12962, #12872).

• Bug fix: Disabled widgets hide their borders (#12949).

• st.audio_input and st.chat_input show a clearer message when microphone permissions are insufficient (#12914).

• Bug fix: st.navigation uses the sidebar font and Streamlit falls back to its built-in fonts if a font can’t be found (#12948).

• Bug fix: MultiselectColumn doesn’t raise a ValueError when adding new rows in st.data_editor (#12860, #12936, #12815). Thanks, kkchemboli!

• Bug fix: MultiselectColumn works correctly when the underlying dataframe has an empty column (#12935, #12842).

• Bug fix: st.text_area avoids negative height calculations that produce invalid CSS (#12891, #12867).

[Marco5]

Amazing work one time more, guys! Many interesting updates in this release (query params, audio in chat input…).

Now I am waiting for the dynamic/deferred tabs in the next release (hopefully)

[Drew4]

did anything in the new release change the behavior of st.number_input? For example, I have:

st.number_input(‘Input:’, min_value=-5.00, max_value=5.00, value=-0.5, step=0.01)

This used to behave fine, but now if I try to type a number with more than 1 keystroke, e.g. “-0.65” it is impossible. It won’t register the “-” at all, and if I try to type “0.65” it will basically ignore everything after “0” and then treat the “6” keystroke as a sort of “add 1” so I end up with “0.01”. It’s become completely unusable as an input method for me.

Not sure if it’s just a me problem or not! If you have any ideas please let me know! Thanks all!

[SiddhantSadangi]

Are you using your numeric keypad, and is the Num Lock off by any chance?

[Goyo]

Indeed it seems to be a you problem. It works for me.

[OpenPoliceData]

When passing a callable to st.download_button, what is the best way to gracefully handle cases where data generation fails?

[mathcatsand]

There isn’t a way to catch the error in your main app script, currently. I filed a feature request for it, so you can comment or upvote it for the devs to track:

For deferred download with `st.download_button`, pipe errors to the script thread