Releases

Version 1.8.7

This patch release reverts two changes that were made in 1.8.6 that turned out to be more disruptive than expected. Additionally it ensures that Tabulator automatically recalculates page sizes on resize and resolves issues with patched versions of Plotly.

🐛 Bug fixes

• Rerun Tabulator page size calculation on resize (#8395)

• Fix issues with monkey-patched versions of Plotly ([#8397]](https://github.com/holoviz/panel/pull/8397))

⏪ Reverted

• Ensure edit_readonly resets both class- and instance-level parameters (#8371)

• Validate ReactiveHTML missing id errors (#8382)

Version 1.8.6

This patch release includes several ESM and React-related fixes, UI behavior improvements, and enhanced robustness in form inputs and file handling. It also bumps key dependencies and improves support for custom deployments. Thanks to @philippjfr, @maximlt, @emunsing, @TheoMathurin, @dalthviz and @hoxbro for their contributions to this release!

✨ Enhancements

• Add placeholder parameter on FloatInput and IntInput (#8360)

• Support for file extensions in FileDropper.accepted_filetypes (#8380)

• Accept 2D arrays for stereo Audio (#8381)

🐛 Bug Fixes

• Ensure collapsed Card still renders components to avoid child render issues (#8274)

• ESM & React Components:

  • Fix errors when renamed parameters are linked on ESM components (#8357)

  • Fix rel_path resolution in ESM components (#8375)

  • Fix autoreload watcher setup for ESM apps (#8361)

  • Delay removal of ReactComponent children until new ones are mounted (#8358)

• Ensure PathLike is accepted for requirements in pyodide conversion calls (#8366)

• Ensure edit_readonly resets both class- and instance-level parameters (#8371)

• Fix guest endpoint validation at root path (#8370)

• Don't attempt to refresh access token if there is no active user session (#8384)

• Ensure OAuth state for user is reset after failing to refresh access token (#8389)

• Ensure config.design value is respected by Template (#8388)

• Improve robustness of Tabulator.page_size inference (#8390)

⚠️ Compatibility & Deprecations

• Added compatibility for pandas 3.0 (#8385)

📚 Documentation

• Update Plotly example to prevent flicker on load (#8362)

🧪 Maintenance

• Bump bokeh to 3.8.2 in Django example app (#8376)

• Bump preact to 10.26.10 (#8367)

• Update pre-commit hooks (#8363)

Version 1.8.5

This release includes several fixes and enhancements for notebook stability, Tabulator behavior, ESM/ReactiveComponent handling, and Markdown rendering. It also adds documentation updates for FastAPI integration, app conversion guides, and the Panel roadmap.

🐛 Bug Fixes

• Fix error in notebook environments causing failure to run apps (#8334)

• Prevent Tabulator from unintentionally reverting show_index=False back to True (#8333)

• Ensure transformed param values are inherited by ESM components (#8338)

• Ensure DataFrame objects can be referenced in Vega datasets (#8330)

• Improve handling of code highlighting in Markdown pane (#8331)

• Allow replacing child models inside ReactiveESM components (#8348)

📚 Documentation

• Add how-to guides for converting Panel apps to desktop and mobile apps (#8349)

• Update FastAPI integration instructions (#8337)

• Publish updated Roadmap for Panel v2 and beyond (#8339)

🧪 Maintenance & Build

• Use trusted publisher setup for NPM release

• Bump Node.js version used in build

Version 1.8.4

Panel 1.8.4 includes key bug fixes and behavior improvements around event ordering, Tabulator interop, and Jupyter/Notebook usage. It also improves support for async usage, validation, and app routing—plus quality-of-life enhancements for both developers and users. Thanks to @philippjfr, @hoxbro, @maximlt, @ahuang11, @MarcSkovMadsen, @TheoMathurin, @ruoyu0088, and @dieterweber for your contributions to this release!

✨ Enhancements

• Add config toggle to disable Bokeh validation (#8294)

• Allow Tabulator.row_content to be an async function (#8309)

• Improve documentation and validation of patch_value (#8312)

• Propagate layout-related parameters to NestedSelect (#8317)

🐛 Bug Fixes

• Fix crash when emptying a DataFrame (#8256)

• Ensure new Panel instance is always loaded (#8293)

• Improve robustness of Bokeh/Panel notebook integration (#8289)

• Fix notebook reading errors by explicitly using UTF-8 encoding (#8304)

• Ensure param.Action only triggers one event (#8305)

• Fix conflict when using both ipywidgets and Tabulator extensions (#8308)

• Ensure discrete events (e.g. button clicks) are scheduled after change events (#8311, #8319)

• Reinstate application name as default index page title (#8313)

• Redirect requests to the prefixed root when --prefix is set (#8321)

• Ensure non-active Tabs are not clickable (#8324)

🧪 Maintenance & Infrastructure

• Update Python/JS dependencies (#8318)

• Fix type checking errors (#8314)

• Pin jupyterlite-core temporarily (#8315)

• Clean up pixi.toml project config (#8303)

⚠️ Compatibility & Deprecations

• Heads up: Starting with Panel 1.9.0, pandas will no longer be installed by default. If your code depends on pandas and you were relying on Panel to install it implicitly, you’ll need to add it as an explicit dependency in your environment or project configuration.

Version 1.8.3

This patch release brings targeted UI fixes, improves Python and Django compatibility, and enhances the developer and contributor experience. It also includes fixes for Tabulator, Pyodide, templates, and app interactivity, along with several documentation and robustness improvements. Many thanks to @ahuang11, @hoxbro, @maximlt, @MarcSkovMadsen, @Coderambling and @philippjfr for their contributions to this release.

✨ Enhancements

• Align CSS variables between default and dark themes (#8248)

• Ensure behavior of dynamically served apps is aligned with file based apps (#8249)

• Add export() method to Vega pane (#8266)

• Add official support for Python 3.14 (#8241)

• Add render_policy="manual" option for JSComponent (#8285)

• Disable text selection when editing in EditableTemplate (#8286)

• Prevent full text selection when replacing input values on CodeEditor (#8262)

🐛 Bug Fixes

• Fix FastAPI bug where pn.state.location wasn’t retained (#8283)

• Fix Tabulator popup container rendering issues (#8247)

• Resolve issues with pipeline next/previous buttons (#8273)

• Ensure ESM compilation uses _esm path (#8245)

• Fix CORS issue with turbine data URL in Pyodide (#8272)

• Ensure ParamRef, ParamFunction, and ParamMethod do not override styling (#8264)

• Fix toggle behavior in BootstrapTemplate sidebar (#8268)

• Minor robustness improvements for Bokeh model interop (#8270)

📚 Documentation

• Minor enhancements to the Panel Gallery deployment (#8240)

• Update Django integration docs (#8252)

• Clarify setup instructions (#8255)

• Fix typo and layout issue in README.md (#8287)

• Fix unclosed code block in convert.md (#8280)

🧪 Infrastructure & Developer Experience

• Remove Bokeh metadata workaround related to Tornado (#8243)

• Bump Django versions in example apps:

  • 4.2.22 → 4.2.25 (#8226)

  • 4.2.22 → 4.2.26 in multi-apps example (#8282)

• Add setup-dev command for easier local development (#8277)

• Improve internal _descendents resolution for parameterized classes (#8284)

• Add __panel__ stub method to PyComponent (#8271)

Version 1.8.2

This patch release focuses on polishing the user experience, fixing regressions, and improving documentation, particularly around app deployment and Tabulator interactivity. It includes several frontend and CSS tweaks, pyodide compatibility fixes, and two new deployment guides for Anaconda Notebooks and PythonAnywhere. Thanks to @philippjfr, @maximlt, @etihwo, @MarcSkovMadsen, and @Coderambling for their contributions to this release.

✨ Enhancements

• Allow custom control over Tabulator editable rows using JSCode (#8204)

• Improve UI discoverability on EditableTemplate (#8206)

• Set pointer cursor on "Connection Lost" toast notification (#8209)

• Serve index.html automatically when serving a static directory (#8222)

🐛 Bug Fixes

• Ensure Tabulator does not break if other components don't correctly initialize (#8212)

• Fix Pyodide jsnull value conversion in Bokeh JSON patches (#8217)

• Fix regression causing column headers not to stretch properly across layout (#8219)

• Ensure config.npm_cdn is respected (#8233)

• Ensure bundled pyodide resources use correct path separator (#8230)

• Ensure pyodide resource bundle is only generated if necessary (#8234)

• Ensure pyodide session is registered as loaded (#8235)

📚 Documentation

• Add how-to guide on deploying Panel apps on Anaconda Notebooks (#8207)

• Add how-to guide on deploying Panel apps on PythonAnywhere (#8216)

• Update Plotly.ipynb to reflect current Plotly version and correct doc URLs (#8214, #8203)

• Add missing Anaconda logo to documentation (#8208)

• Add how-to guide on using uv to distribute Panel apps and dependencies (#8205)

Version 1.8.1

Many thanks to @ATL2001 (first contribution), @Coderambling, @philippjfr, and @hoxbro for their contributions.

Enhancements

• Add configuration to disable container popup (#8200)

Bug Fixes

• Ensure Tabulator empty column has no width (#8193)

• Add UTC timezone to default time for croniter (#8199)

Documentation

• Update indicators_performance.md to fix typo (#8192)

Version 1.8.0

This release brings a wide range of new features, enhancements, and compatibility improvements. Highlights include support for JSCode in ECharts and Tabulator, reworked WebSocket reconnection, and the ability to bundle resources into WASM apps, and numerous bug fixes to improve stability across components and templates. It also includes compatibility updates for Bokeh 3.8 and several improvements for use in Pyodide, JupyterLite, and authentication-based deployments. Many thanks to our returning contributors @dalthviz and @etihwo, a very warm welcome to our new contributors @c-meier and @flxmr and as usual many thanks to our core team including @maximlt, @hoxbro, @ahuang11, @MarcSkovMadsen and @philippjfr.

🚀 Features

• Support for inline JavaScript functions in ECharts and Tabulator via JSCode wrapper (#8162)

• Add support for reconnecting to a session after network disruption (#8120)

• Add support for AVIF images (#8164)

• Add support for bundling local resources into WASM apps (#8181)

✨ Enhancements

• Improve .from_param() behavior and error messages (#8047, #8079)

• Add --reuse-sessions warm option to reduce session cold starts (#8087)

• Enable event dispatch immediately after WebSocket connect (#8101)

• Improve error message display in LiteralInput (#8102)

• Allow hold usage from a thread (#8113)

• Improve uniformity and consistency in Tabulator column configuration (#8127)

• Trigger param.Event correctly on value change (#8148)

• Allow registering external extension_cdn for JS resources (#8175)

• Allow overriding the default_widgets on HoloViews pane (#8186)

🐛 Bug Fixes

• Ensure Terminal resizes correctly (#8109)

• Bundle correct AceEditor version (#8111)

• Remove bokeh-sampledata dependency from Pyodide builds (#8138)

• Correct resource handling when resources are symlinked (#8143)

• Correct behavior when FileDownload resets cursor before reading (#8154)

• Fix handling of NaT values (#8156)

• Apply template design after rendering template (#8155)

• Prevent select-all checkbox from being hidden in Material theme (#8147)

• Fix handling of exclusive bounds in Param widgets (#8165)

• Fix layout of Card headers with row flex mode (#8166)

• Uncap height of children in scrollable Column layouts (#8167)

• Fix errors in ECharts when chart has already been destroyed (#8168)

• Fix Tabulator filter behavior with list-based filters (#8169)

• Allow Card to overflow container (#8170)

• Fix pyodide model syncing (#8174)

⚠️ Deprecations

• Removed panel.io.model.hold (was moved to panel.io.document.hold in 1.6.0) (#8188)

• Deprecated panel.chat.langchain.PanelCallbackHandler (to be removed in 1.9.0) (#8188)

📦 Compatibility & Infrastructure

• Update component versions (#7447)

  • DeckGL version from 9.0.20 to 9.1.14

  • ECharts version from 5.6.0 to 6.0.0

  • KaTeX version from 0.6.0 to 0.16.22

  • Perspective version from 3.6.1 to 3.8.0

  • Plotly version from 3.0.1 to 3.1.0

  • Vega version from 5 to 6.1.2 and vega-lite dependency from 5 to 6.3.0

  • Vizzu version from 0.15 to 0.17.1

• Drop support for Bokeh 3.5 and 3.6 (#8116)

• Full compatibility with Bokeh 3.8 (#8160)

📚 Documentation

• Add guide for using WebSocket comms (#7952)

• Update links for Tabulator (#8126)

• Align component parameter reference documentation (#8152)

Version 1.7.5

This patch release brings a number of important bug fixes and refinements, including improved modal behavior, Param integration fixes for ESM, and security hardening of authentication templates. Thanks to @harmvanderheijden, @marcskovmadsen, @maximlt, and @philippjfr for their contributions.

Enhancements

• Improve .from_param() error messages (#8047)

• Add --reuse-sessions warm option to preload and cache apps before first use (#8087)

Security

• Fix XSS vulnerabilities in login and OAuth error templates by escaping user-controlled input (#8049)

Bug Fixes

• Fix value_throttled handling in Param panes (#8057)

• Prevent AutocompleteInput from resetting when restrict=False (#8056)

• Fix callback cleanup for --reuse_sessions mode (#8052)

• Reset param.Event state on ESM components (#8054)

• Allow Player components to start upon initialization (#8058)

• Fix modal dialog stacking and focus behavior in VanillaTemplate (#8059, #8060)

• Avoid errors in Tabulator when editing DataFrames with pd.NA values (#8068)

• Add guard for undefined url in ImportedStyleSheet (#8071)

• Ensure session token payload is correctly updated when reusing sessions (#8072)

• Ensure --reuse-sessions caches the --index app correctly (#8073)

• Add debounce logic to ModelChanged events in Pyodide to improve performance and prevent redundant updates (#8077)

• Ensure Layoutable params propagate to HoloViews plots (#8078)

• Fix regression in handling param.Action in .from_param() utility (#8079)

• Ensure LoadingSpinner.visible correctly hides the component (#8081)

• Ensure JSONEditor triggers on re-ordering of nodes (#8086)

• Fix JSONEditor menu option to improve usability (#8085)

Documentation

• Add websocket communication how-to guide to documentation (#7952)

• Add note about increasing proxy buffer size for OAuth behind reverse proxies (#8084)

Maintenance

• Fix gallery deployment automation (#8055)

Version 1.7.4

This patch release introduces small but impactful security, compatibility, and usability improvements. It enhances OAuth behavior, adds byte support for the PDF pane, and fixes several rendering and import issues across backends and components. Thanks to @ahuang11, @dalthviz, @MarcSkovMadsen, and @philippjfr for their contributions.

Enhancements

• Add support for bytes input to the PDF pane (#8044)

• Add logout_url for Auth0 to OAuth error page template (#8036)

Security

• Add authentication to files served from --static-dirs (#8042)

• Escape error messages shown on the OAuth error page fixing XSS vulnerability (#8043)

Bug Fixes

• Ensure ReactComponent forces a re-render after render step (#8037)

• Fix this.mouse bug in ECharts implementation (#8041)

• Fix incorrect import path in Django integration docs (bokehjsdir → bokehjs_path) (#8040)

• Update Bokeh/FastAPI extra dependency pin to ensure compatibility (#8039)

Version 1.7.3

This patch release includes several critical stability improvements, JavaScript race condition fixes, and developer experience enhancements. It also introduces small but helpful UI features such as exception copying and better error feedback in CLI and ESM workflows. Many thanks to contributors @etihwo, @bsdz, @Coderambling, @hoxbro, @philippjfr, and @MarcSkovMadsen.

Enhancements

• Add “Copy to Clipboard” button for exceptions in the UI (#8034)

• Enable MathJax rendering if the extension is available (#8004)

• Allow setting a custom title for Tabulator multi-index columns (#8008)

• Improve feedback in panel compile and reactive ESM workflows (#8012, #8010)

• Ensure exceptions are printed to the command line in development mode (#8022)

Bug Fixes

• Guard against race conditions in DeckGL during resize (#8031)

• Prevent errors when client_comm is undefined in some JS execution contexts (#8030, #8033)

• Fix dark theme background issue in MultiChoice widget (#8014)

• Avoid rendering Plotly components if container is not yet defined and prevent layout boomeranging (#8021)

• Ensure React useState callbacks are registered only once (#8023)

• Support Path objects in stylesheet definition (#8026)

Version 1.7.2

This patch release includes a number of important bug fixes, optimizations, and compatibility updates, particularly for React and ESM-based components. It also includes enhancements to the Tabulator table and more robust support for Audio/Video panes. Many thanks to @etihwo for his continued contributions and the maintainer team @hoxbro and @philippjfr.

Enhancements

• Support for passing bytes and BytesIO objects to Audio and Video panes (#7963)

• Add header tooltips to Tabulator (#7988)

• Optimize layout calculations for ESM components (#7989)

• Allow nested ReactComponents to bypass Shadow DOM (#7991)

• Support --ico-path CLI option to support explicit .ico path specification (#7992)

• Loosen parameter type for ReactiveExpr.widget_layout (#7964)

• Automatically unblock Comm on WebSocket re-connect (#7986)

Bug Fixes

• Fix Tabulator fast design and fix styling issues (#7956)

• Keep reference state consistent after Pyodide syncing (#7966)

• Ensure correct model is used when determining if a link is set up (#7968)

• Do not dispatch events on hold/unhold when the document is uninitialized (#7972)

• Ensure theming does not error on PyComponent (#7975)

• Prevent stylesheet patch from dispatching during initial load (#7978)

• Fix caching issue for ESM render modules (#7990)

• Correct initialization behavior of ReactComponent (#7996)

• Fix threading race condition when applying consecutive updates to Param widgets (#8003)

Version 1.7.1

This patch release adds a new option to disable FileDropper previews and fixes a regression when updating Column children in Bokeh<3.7. Additionally it includes a number of documentation improvements. Many thanks to our returning contributors @dalthviz, @emmanuel-ferdman, @MarcSkovMadsen, and @hoxbro

Enhancements

• Add option to disable FileDropper previews (#7944)

• --index-titles help string typo fix and don't call title on user input (#7935)

Bug fixes

• Migrate to correct logger interface (#7931)

• Column updates not working for Bokeh<3.7 (#7948)

Documentation

• Fix image links in Azure documentation (#7938)

Version 1.7.0

This minor release is not as jam-packed as previous minor releases but adds a number of quality of life improvements, bug fixes and features along with version and compatibility updates for a number of JS dependencies. Many thanks to some of our more frequent contributors @dalthviz, @etihwo, our new contributor @emmanuel-ferdman and our maintainers @Hoxbro, @MarcSkovMadsen and @philippjfr.

Features

• Add a secondary (right) sidebar to the FastListTemplate (#7774)

• Add Date(Time)Picker.allowInput option (#7886)

• Add Markdown.disable_anchors option (#7902)

• Add config.cache_path variable to configure default location for diskcache (#7903)

• Support custom cookie path (#7911)

• Allow customizing index page titles with --index-titles CLI option (#7916)

• Add Image.target option to configure where to open link_url (#7924)

Enhancements

• Display parameter name in error messages (#7879)

• Improve Material design styling (#7891, #7917)

• Improve logic for computing Tabulator page size automatically (#7915)

Versions and Compatibility

• Bump Ace CodeEditor version 1.40.1 and add themes (#7874)

• Bump pyodide version to 0.27.5 (#7905)

• Bump ECharts version to 5.6.0 (#7905)

• Bump JSONEditor version to 10.2.0 (#7905)

• Bump Perspective version to 3.6.1 (#7919)

Bug fixes

• Deduplicate components before compiling (#7887)

• Avoid boomeranging of events after hold is applied (#7892)

• Handle .ico image base64 mime-type correctly (#7894)

• Ensure FileDropper height is not limited (#7898)

• Ensure correct stylesheet cache is used by theme hooks when component is shared between sessions (#7896)

• Reset BaseTemplate._documents correctly on autoreload (#7897)

• Ensure widget CSS is loaded correctly when server path is prefixed (#7900)

• Correct display Tabulator with multi index and multi index column (#7907)

• Ensure stretch and scale sizing_mode does not cause overflow in container (#7928)

Documentation

• Document caching of dependencies by combining cache with depends (#7876)

• Remove deprecated keyword in doc for DateRangeSlider and DateTimeRangSlider (#7893)

• Add guidance on troubleshooting OAuth issues (#7921)

Version 1.6.3

This release introduces a number of performance improvements related to rendering of children in layouts and ESM components, a number of bug fixes and a number of documentation improvements. We are pleased to welcome @malemburg as a new contributor and want to thank @s-alexey, @Coderambling, @etihwo and our core maintainer team including @hoxbro, @ahuang11, @MarcSkovMadsen and @philippjfr for their contributions to this release.

Enhancements

• Implement smarter Column child rendering #7846

• Optimize ReactComponent child renders #7828

• Add indent and soft_tabs options to CodeEditor #7831

• Allow creating Param.widget without instantiating object, speeding up Widget.from_param #7867

Bug fixes

• Fix handling of React based AnyWidgetComponent types #7820

• Cache ESM render modules #7827

• Check for None in select function for PyComponent #7837

• Fix for AttributeError in auth.py:CodeChallenge OAuth login #7844

• Fix error when old_objects is empty in _get_objects() #7842

• Ensure ReactiveESM renders elements #7853

• Ensure ESM shared resources are watched properly #7856

• Fix Material design Tabulator header color #7855

• Ensure current view and selection lookups on Tabulator handle None case #7858

• Ensure Modal events are targeted to correct model #7860

• Ensure ChatFeed has inherent height #7861

• Ensure Markdown code blocks are always left aligned #7862

• Gracefully handle ECharts delayed rendering #7869

Documentation

• List version agnostic wheel URLs in WASM standalone docs #7857

• Correct ClassSelector keyword in build_todo.md #7819

• Fix documentation of --oauth-extra-params #7865

• Fix minor issues in FastAPI docs #7866

• Clarify OAuth redirect uri #7868

• Add section in load balancing about Bokeh extensions (#7832)

Version 1.6.2

This release primarily introduces improvements for ESM and React components and refactoring to make it easy to subclass existing components. This is an effort to make it easier to provide alternative implementations for Panel components. Additionally this release includes compatibility for Bokeh 3.7, bug fixes for TextEditor and a variety of other bug fixes. Many thanks to our new contributor @s-alexey, our returning contributors @Coderambling and the core maintainer team including @Hoxbro, @ahuang11 and @philippjfr.

Enhancements

• Make it easier to subclass components (#7730, #7744, #7785)

• Allow model.useState in ReactComponents to reference nested parameter values (#7743)

• Allow providing shared ESM modules (#7757)

• Allow defining root node for ReactComponent (#7787)

• Improve pretty printing in HoloViews pane (#7775)

• Allow serializing joint dict/Parameterized types on DataModel (#7789)

• Improve ListLike and NamedListLike to better match Python list behavior (#7794)

• Improve rendering of ReactComponent children (#7802)

• Allow overriding Param input widgets (#7813)

Performance

• Avoid redundant list operations in ListLike (#7764)

• Optimize ipywidget reference transform (#7778)

Bug fixes

• Correctly handle empty source files (#7732)

• Add extra guard around get_ipython check (#7734)

• Ensure ReactComponent children are sized correctly (#7741)

• Ensure ChatStep does not toggle from failed to success (#7742)

• Ensure Feed and scrollable layout children heights are not fixed (#7747)

• Declare more Child parameters on various components (#7749)

• Do not sync parameters mapped to None on on ESM components (#7750, #7753)

• Always include esm.css for ESM components (#7752)

• Do not duplicate stylesheets (d133eb9)

• Ensure ChatStep text does not overflow container (#7770)

• Refactor ChatFeed post hook ensuring it processes correct message (#7722)

• Ensure hooks are applied to root components with Fast design (#7777)

• Ensure resource mode is set in notebooks (#7776)

• Clear state cookie if OAuth access token expired and can't be refreshed (#7780)

• Fix formatting in TextEditor widget (#7739)

• Use Ace version with no require.js dependency (#7781)

• Ensure multiple sequential notifications render (#7790)

• Style correct column when frozen Tabulator column is an index (#7792)

• Ensure IconButton tooltip timer is cleared on multiple mouseenter events (#7798)

• Ensure pre-processors are applied to ESM children (#7799)

• Ensure outputs are laid out correctly after initial render of EditableTemplate (#7816)

• Fix regressiong related to providing Path to ESM component stylesheets (#7809)

Compatibility

• Compatibility with Bokeh 3.7 (#7724, #7815)

• Update TextEditor widget to Quill.js 2.0.2 (#7739)

• Update Plotly pane to Plotly.js 3.0.1 (#7731)

Documentation

• Incorrect hover text for max_width and max_height: both said Minimum instead of Maximum (#7729)

• Various minor documentation updates (#7719, #7738, #7746, #7755, #7760, #7761, #7763)

Version 1.6.1

This patch release primarily addresses issues running Panel behind a reverse proxy, improves the developer experience of working with custom ESM bundles and adds compatibility for Plotly 6.0. Congratulations to @fabiovincenzi and @pankajp for their first contribution fixing inlining of stylesheets. Many thanks to to our returning contributors @ceball, @Azaya89 and @Coderambling as well as our core developer team including @ahuang11, @Maximlt, @hoxbro and @philippjfr for contributing to this release.

Enhancements

• Add ChatFeed.scroll_to method (#7671)

• Implement watch feature for panel compile command (#7683)

• Allow ESM components to load CSS bundles (#7685, #7691)

• Generalize ReactiveESM.select so children are automatically detected (#7699)

Bug fixes

• Ensure errors in sync periodic callbacks are logged (#7665)

• Reset visible_range when Feed.objects are updated (#7673)

• Ensure ESM bundles correctly resolve component implementations (#7684, #7698)

• Fix default avatar in send/stream (#7677)

• Ensure index redirects are relative to fix index page behind a reverse proxy (#7704)

• Ensure root_url is correctly determined during auth (#7680)

• Ensure the modal is on top in EditableTemplate (#7710)

• Ensure Tabulator selection is recalculated after filtering (#7712)

• Fix custom login endpoints (#7714)

• Ensure type checkers can correctly infer extension argument types (#7709)

• Ensure custom components and extensions respect resource mode in notebooks (#7701, #7716)

• Ensure in process events are cleaned up after they are applied (#7717)

Compatibility

• Compatibility with Plotly 6.0 (#7681, #7682)

• Bump pyodide version to 0.27.2 and PyScript version to 2025.2.1 (#7718)

Docs

• Add links to other HoloViz libraries to the sidebar (#7674)

• Minor documentation fixes (#7664, #7668, #7692)

Version 1.6.0

This release adds a number of features including a standalone Modal component, the ability to infer widget parameters from values, and the ability to easily edit a ChatMessage. Additionally it includes a number of enhancements for styling, particularly in dark themes, other enhancements for chat components and a large number of bug fixes. Many thanks for our returning contributor @kdheepak, our new contributors @pgierz, @jonatantreijs and @etihwo, and of course the whole maintainer team including @ahuang11, @MarcSkovMadsen @hoxbro, @maximlt and @philippjfr.

Features

• Add PAM authentication support (#6861)

• Add Widget.from_values method (#7033)

• Add a standalone Modal layout (#7083)

• Introduces ChatMessage and ChatFeed edit functionality (#7559)

Enhancements

• Allow ChatFeed.callback_exception to accept a callable and 'traceback' (alias for verbose) (#7558)

• Fix Accordion active_header_background in dark theme (#7576)

• Increase default max character limit on ChatAreaInput (#7562)

• Fix chat message alignment issues (#7563)

• Make Markdown pane line breaking behavior configurable (#7582)

• Improve styling of chat components in dark theme (#7601, #7602)

• Automatically scroll when streaming to ChatFeed and ChatStep (#7608)

• Add support for remote filesystems on FileSelector (#7618)

• Add support for FigureWidget events on Plotly pane (#7654, #7662)

Bug fixes

• Fix Azure Oauth issues (#7587)

• Correctly display file not found paths in panel convert (#7589)

• Fix Tabulator.patch when table is filtered (#7621)

• Ensure esbuild can be detected on windows during panel compile (#7625)

• Fix various issues styling Tabulator when it is wider than the viewport (#7626)

• Fix resource loading when serving Panel app on nested FastAPI endpoint (#7627)

• Fix panel oauth-secret command (#7628)

• Ensure fonts are applied to NotificationArea (#7633)

• Handle session context where session is not defined (#7634)

• Ensure CompositeWidget can be populated in callback (#7636)

• Correctly identify skimage and PIL packages when converting to pyodide (#7637)

• Ensure we use CDN resources in pyodide (#7638)

• Consistently apply sizing_mode to FileSelector components (#7640)

• Ensure tasks are cancelled correctly (#7641)

• Ensure NotificationArea stylesheet loads in panel-preview (#7643)

• Ensure NestedSelect updates when options are changed (#7649)

• Ensure ButtonIcon displays an icon during click (#7650)

Compatibility and Updates

• Update panel convert to latest versions of pyodide and pyscript (#7584)

• Bump plotly.js version to 2.35.3 (#7657)

• Bump tabulator.js version to 6.3.1 (#7656)

Documentation

• Ensure Open in JupyterLite links work (#7622)

• Add admonitions for outdated guides and minor corrections (#7635)

• Add form tutorial (#7568)

• Fix and reorganize API docs (#7659)

Version 1.5.5

This release fixes a regression causing .node_modules to be bundled into our released wheel and introduces a number of bug fixes and enhancements. Many thanks to @mayonnaisecolouredbenz7, @pmeier, @Italirz, @Coderambling and our maintainer team @MarcSkovMadsen, @hoxbro, @ahuang11, @thuydotm, @maximlt and @philippjfr.

Enhancements

• Add ability to scroll_to a particular object on Column (#7206)

• Add pointer when hovering on Markdown copy button (#7490)

• Allow streaming to ChatStep (#7520)

• Improve ChatMessage repr (#7521)

• Add ChatInterface button tooltips (#7552)

Bug fixes

• Ensure Notifications are cleaned up correctly (#4964)

• Ensure FileDownload label text updates correctly (#7489)

• Fix Tabulator aggregation behavior (#7450)

• Fix typing for .servable method (#7530)

• Ensure NestedSelect respects disabled parameter (#7533)

• Ensure errors in hooks aren't masked by fallback to different signature (#7502)

• Ensure Notifications are only shown once if scheduled onload (#7504)

Documentation

• Improve hold how-to guide (#7487, #7500)

Maintenance

• Enable strict type checking (#7497)

• Ensure node_modules aren't bundled into package (#7526)

• Internal cleanup of compatibility code for older param versions (#7527)

Compatibility

• Compatibility for websockets 14 when running on FastAPI server (#7491)

• Compatibility with Textual 0.86 (#7501)

• Compatibility with Altair 5.5.0 (#7523)

• Bump Vizzu version to 0.15 (#7485)

Version 1.5.4

This release primarily focuses on improving the ESM components including fixes for serialization of parameter values, improvements for compiling bundles, and building custom layouts. Additionally this release includes the new DatetimeSlider, adds a copy button to codeblocks in Markdown panes, improves responsive sizing for Plotly and starts adding better support for Polars. Many thanks and a warm welcome to our new contributor @MP-MaximilianLattka as well as our maintainer team, including @Hoxbro, @thuydotm, @ahuang11, @MarcSkovMadsen and @philippjfr.

Enhancements

• Add DatetimeSlider widget (#7374)

• Improve Jupyter preview error handling (#7434)

• Add copy button to Markdown codeblocks (#7451)

• Various improvements for writing ESM components (#7462)

• Log authorization callback errors (#7463)

• Support polars in pn.cache (#7472)

• Improve and document hold utility (#7474)

• Improve how panel compile collects bundles (#7477)

Bug fixes

• Fix issues detecting changed property values during serialization (#7432)

• Ensure ESM compilation correctly detects file extension (#7446)

• Ensure parameter overrides are applied to ESM components (#7452)

• Ensure component Children parameter correctly resolves when multiple types are defined (#7454)

• Fix issues using Jupyter Preview with notifications enabled (#7466)

• Ensure HTML/Markdown streaming does not freeze during rapid updates (#7480)

• Ensure Plotly sizes correctly on initial render (#7483)

Version 1.5.3

This release fixes a number of smaller regressions related to Tabulator row_content, ensures --dev/--autoreload picks up on external modules correctly and resolves OAuth guest endpoints correctly. Additionally it introduces some enhancements and bug fixes for custom components, such as adding support for loading custom components ESM Javascript bundles from the inbuilt endpoint ensuring that the bundle can be cached by the browser. Many thanks and welcome to our new contributors @chryshumble and @haojungc, our returning contributors @TheoMathurin, @aktech and @Coderambling and the core maintainer team @Hoxbro, @ahuang11, @MarcSkovMadsen and @philippjfr for their contributions to this release.

Enhancements

• Sync dark mode on browser_info object (#7382)

• Allow loading custom component ESM bundles from URL (#7410, #7412)

Bug fixes

• Address issues with Tabulator embed_content and optimize row expansion (#7364)

• Prevent pipeline network plot from linking with other plots (#7372)

• Various fixes for custom component compilation (#7381)

• Fix OAuth guest endpoint (#7385)

• Fix ReactiveESM._importmap typing (#7392)

• Ensure that autoreload records modules to watch before startup (#7399)

• Prevent Tabulator from overlapping when max_height is set (#7403)

• Do not mutate layout Children inplace (#7417)

• Set Tabulator null formatter to empty string (#7421)

• Ensure Tabulator table content does not overflow (#7425)

• Ensure cache handles hashing of classes and instances correctly (#7478)

Compatibility

• Upgraded Tabulator version to 6.3 (#7419)

Documentation

• Update components_overview.md with text fixes (#7335)

• Corrected styles in doc (#7371)

• Fix typo in panel.io.server docstring (#7405)

Version 1.5.2

Date: 2024-10-03

This release is a small patch release primarily addressing a regression handling selections on multi-indexed data on the Tabulator widget along with a number of documentation improvements. Many thanks to @jrycw along with @MarcSkovMadsen, @Hoxbro and @philippjfr for their contributions to this release.

Bug fixes

• Fix regression handling selection on multi-indexed Tabulator data (#7336)

• Fix Fast template theme toggle color (#7341)

Documentation

• Fix typo for FastListTemplate reference example (#7339)

• Fix custom component docstrings (#7342)

• Improve plotly style guide (#7346)

• Ensure sidebar toggle patch is loaded correctly (#7349)

• Fix and update WebLLM example (#7351)

• Correctly document step unit on DateSlider (#7353)

Version 1.5.1

Date: 2024-09-27

This release primarily focuses on a number of tweaks and enhancements for the documentation and also resolves a number of bugs related to Tabulator rendering and the new FastAPI integration. As always, many thanks to our contributors including our new contributors @dennisjlee and @alexcjohnson, our returning contributors @thuydotm and @jbednar and the core maintainer team @hoxbro, @maximlt, @ahuang11, @MarcSkovMadsen and @philippjfr.

Enhancements

• Add mapboxgl CSS to Plotly (#7320)

• Tweak margins of icons in ChatMessage (#7310)

Bug fixes

• Fix langchain import in panel.chat.langchain (#7297)

• Ensure Tabulator is consistently redrawn after render and resize (#7305)

• Filter out empty plotly_selected events (#7312)

• Improve parameter validation on Timepicker (#7308)

• Ensure Tabulator.selection consistency when pagination='local' (#7304)

• Correctly handle ipv6 localhost URI in Location (#7316)

• Ensure resource URLs are handled correctly in all server implementations (#7318)

• Ensure Plotly datetime are correctly converted from timestamp to date string (#7319)

Regressions

• Only postpone --setup script until after server startup if --num-procs is greater than 1 (#7289)

Compatibility

• Support for Bokeh 3.6.x releases (#7322)

Documentation

• Fix and improve JupyterLite pyodide distribution (#7286)

• Document how to apply gradient styling o Tabulator cells (#7291)

• Clarified wording in best practices docs (#7290)

• Minor tweaks for the FileDropper (#7307)

• Ensure docs consistently recommend --dev over --autoreload (#7285)

• Tweaks for Tabulator docs (#7315)

• Improve fastapi docs (#7317)

• Add note about Tabulator font-size (#7321)

• Tweak best practices (#7301)

• Fix typo in JPG component docs (#7323)

Version 1.5.0

Date: 2024-09-13

This release, while technically a minor release hugely expands the scope of what is possible in Panel. In particular the introduction of the new panel.custom module makes it trivially easy to create new JS and React based components using modern tooling, a first-class developer experience and support for compilation and bundling. We are incredibly excited to see which new components you build using this approach. This release also includes native integration with FastAPI, such that you can now run Panel apps natively on an existing FastAPI server. We also introduce a number of new components, improved the developer experience, and squashed a huge number of bugs, particularly for the Tabulator component.

We really appreciate all the work that went into this release from 21 separate contributors. In particular we would like to welcome our new contributors @twobitunicorn, @justinwiley, @dwr-psandhu, @jordansamuels, @gandhis1, @jeffrey-hicks, @kdheepak, @sjdemartini, @alfredocarella and @pmeier. Next we want to recognize our returning contributors @cdeil, @Coderambling, @jrycw and @TBym, and finally the dedicated crew of core contributors which includes @Hoxbro, @MarcSkovMadsen, @ahuang11, @maximlt, @mattpap, @jbednar and @philippjfr.

Features

• Allow building custom ESM based JSComponent and ReactComponent (#5593)

• Add Placeholder pane (#6790)

• Add FileDropper widget (#6826)

• Add ChatStep component to show/hide intermediate steps (#6617)

• Add TimePicker widget (#7013)

• Add PyComponent baseclass (#7051)

• Add native support for running Panel on FastAPI server (#7205)

Enhancements

• Allow callbacks after append and stream (#6805)

• Enable directory uploads with FileInput (#6808)

• Make autoreload robust to syntax errors and empty apps (#7028)

• Add support for automatically determining optimal Tabulator.page_size (#6978)

• Various typing improvements (#7081, #7092, #7094, #7132)

• Display value for player (#7060)

• Optimize rendering and scrolling behavior of Feed (#7101)

• Implement support for multi-index columns in Tabulator (#7108)

• Add placeholder while loading to ChatFeed (#7042)

• Allow streaming chunks to HTML and Markdown panes (#7125)

• Show Player interval value on click (#7064)

• Expose Player options to scale and hide buttons (#7065)

• Add on_keyup and value_input for CodeEditor (#6919)

• Detect WebGL support on BrowserInfo (#6931)

• Tweak ChatMessage layout (#7209, #7266)

• Add nested editor to Tabulator (#7251)

• Support anchor links in HTML and Markdown panes (#7258, #7263)

Bug fixes

• Ensure Gauge is responsively sized (#7034)

• Ensure Tabulator sorters are correctly synced (#7036)

• Ensure Tabulator selection is consistent across paginated, sorted and filtered states (#7058)

• Do not propagate clicks on input elements in Card header (#7057)

• Ensure Tabulator range selection applies to current view (#7063)

• Ensure Tabulator.selection is updated when indexes change (#7066)

• Ensure Tabulator can be updated with None value (#7067)

• Fix issues with PYTHONPATH in Jupyter Preview (#7059)

• Ensure Tabulator styling is correctly applied on multi-index (#7075)

• Fix various scrolling related Tabulator issues (#7076)

• Ensure Tabulator data is updated after filters are changed (#7074)

• Allow controlling DataFrame pane header and cell alignment (#7082)

• Highlight active page in Tabulator using Fast Design (#7085)

• Ensure follow behavior works when streaming to paginated Tabulator (#7084)

• Avoid events boomeranging from frontend (#7093)

• Correctly map Tabulator expanded indexes when paginated, filtered and sorted (#7103)

• Ensure custom HoloViews backends do not error out (#7114)

• Ensure events are always dispatched sequentially (#7128)

• Ensure 'multiselect' Tabulator.header_filter uses 'in' filter function (#7111)

• Ensure no content warning is not displayed when template is added (#7164)

• Make it easy to prompt user for input in ChatFeed (#7148)

• Fix LaTeX pane MathJax rendering (#7188)

• Ensure OAuth expiry is numeric and can be compared (#7191)

• Correctly detect max depth of NestedSelect if level is empty (#7194)

• Make --setup/--autoreload/--warm work with --num-procs (#6913)

• Ensure error rendering application does not crash server (#7223)

• Refactor state.notifications to fix pyodide (#7235)

• Handle setting None value on DateRangePicker (#7240)

• Add header_tooltips parameter to Tabulator (#7241)

• Fix issue using Tabulator.header_filter with recent Pandas versions (#7242)

• Fix setting of Dial background (#7261)

• Fix issues when loading multiple times in a Jupyter(Lab) session (#7269)

Compatibility and Updates

• Update to Bokeh 3.5.x

• Update Tabulator to 6.2.1 (#6840)

• Update to latest Pyscript (2024.08.01) and Pyodide (0.26.2) (#7016)

• Add compatibility for latest Textual (#7130)

Documentation

• Update Tabulator.ipynb to show correct version number of Tabulator (#7053)

• Update jupyterlite version (#7129)

• Describe usage of pyscript editor (#7017)

• Add pycafe deployment guide (#7183)

• Add WebLLM example to gallery (#7265)

Deprecation and API Warnings

• PasswordInput and TextAreaInput no longer inherit directly from TextInput (#6593)

• Remove deprecated panel.depends.param_value_if_widget function (#7202)

Version 1.4.5

Date: 2024-07-25

This release addresses includes a wide range of bug fixes and some minor enhancements primarily aimed at performance. Many thanks to @CodeRambling as a returning contributor, and the core developer team including @Hoxbro, @MarcSkovMadsen, @maximlt and @philippjfr for contributing to this release.

Enhancements

• Ensure Design is applied globally when using global templates (#6992)

• Do not re-render all children when expanding Tabulator row (#7008)

• Allow providing DataFrame as part of vega(-lite) spec (#6979)

Bug fixes

• Clear selection if value change from pagination=remote (#6008, #6968)

• Ensure user cookie can be unencoded (#6937)

• Do not trigger ScrollButton event unless clicked (#6938)

• Do not error on autoreload shutdown (#6940)

• Ensure hooks such as plot linking are applied across roots in a template (#6975)

• Ensure Feed maintains scroll position (#6984)

• Ensure correct Document is set after liveness session cleanup (#6988)

• Fix issue detecting PyScript worker (#6998)

• Fix FileDownload icon alignment (#6981)

• Ensure redraw does not error out if Tabulator is undefined (#6930)

• Guard auth against user being removed (#6908)

Documentation

• Add crossfiltering dashboard tutorial (#6630)

• Add server video stream tutorial (#6727)

• Improve Param pane docstring (#6989)

• Fix streamz reference notebook (#6980)

• Document that Image pane is a wrapper around PNG, JPEG, PDF etc. panes (#7004)

Version 1.4.4

Date: 2024-05-31

This release primarily addresses a critical regression in notebook comm channel handling introduced in 1.4.3 and includes a few minor fixes for Tabulator and documentation related issues. Many thanks to @justinwiley for his first contribution to Panel, @twobitunicorn as a returning contributor and the core contributors @maximlt and @philippjfr for their continued work.

Bug fixes

• Fix notebook CommManager extraction of buffers (#6880)

• Fix issue when editing timezone-aware datetime column Tabulator (#6879)

• Ensure Tabulator does not rebuild children when using embed_content with row_content (#6881)

• Ensure ParamRef, ParamFunction and ParamMethod resolve synchronous generators asynchronously (#6885)

• Ensure periodic callback cleanup does not error on session warmup (#6886)

Documentation

• Update OAuth documentation to correctly reference auth_code provider (#6875)

• Fix CheckBoxGroup value type annotation in reference docs (#6877)

Version 1.4.3

Date: 2024-05-23

This patch release is likely the last in the 1.4.x series. The most important fixes in this release are fixes to ensure keyboard shortcuts do not get triggered inside Panel components for for recent versions of JupyterLab, fixes for OAuth token refreshes, and various documentation fixes. The release also includes a small number of enhancements, including improved UX for the FileSelector. Many thanks to the many contributors to this release including @jrycw, @Coderambling, @cdeil, @twobitunicorn, and the maintainers @Hoxbro, @MarcSkovMadsen, @ahuang11, @maximlt and @philippjfr.

Enhancements

• Add CSS on mouse interaction with Card (#6636)

• Make ChatMessage.reaction_icons reactive (#6807)

• Allow external library to define additional socket handler (#6820)

• Allow navigating FileSelector with double click (#6843)

Bug fixes

• Ensure reference is resolved when passing options to from_param (#6762)

• Ensure token refresh is always scheduled (#6802)

• Fix small memory leak when caching Design modifiers (#4978)

• Ensure refreshed tokens can be accessed across processes (#6817)

• Ensure binary buffers are correctly extracted in notebook CommManager (#6818)

• Make Tabulator resize handling more robust (#6821)

• Fix links in panel convert index (#6828)

• Suppress keyboard shortcuts in notebook output (#6825)

• Ensure we don't error out when FastDesignProvider is undefined (#6832)

• Ensure model changes are applied while session is starting (#6835)

Documentation

• Refactor the hvplot.interactive tutorial utilizing pn.rx (#6700)

• Update styling after upgrade to latest pydata-sphinx-theme (#6823)

• Fix bug in Reset Jupyterlite script (#6834)

• Fix gallery deployment URL (#6831)

• Add redirects for old documentation pages (#6833)

• Remove Google Analytics (#6836)

• Various documentation fixes (#6829)

• Fix link in gallery index (#6858)

Version 1.4.2

Date: 2024-04-23

This micro-release fixes a number of smaller regressions and bugs including parsing of notebooks. Many thanks to our new contributor @bkreider, our returning contributors, @jrycw and @ea42gh, and our dedicated team of maintainers including @ahuang11, @MarcSkovMadsen and @philippjfr.

Enhancements

• Allow toggling CTRL+Enter vs Enter to send ChatAreaInput (#6592)

• Allow adding JS callbacks in ChatInterface.button_properties (#6706)

Bug fixes

• Fix regression in parsing notebooks served as apps (#6736)

• Do not include placeholder in ChatInterface.serialize and properly replace placeholder for streams (#6734)

• Remove Perspective.toggle_config which was erroneously reintroduced in 1.4.1 (#6721)

• Fix dynamically setting ChatMessage footer_objects/header_objects (#6705)

• Allow Location.sync of DataFrame parameters (#6745)

• Fix and improve Plotly event handling (#6753)

• Fix issue when converting templated apps to Pyodide/PyScript (#6756)

• Fix styling of loading indicator in Fast design (#6761)

• Ensure VTK nan, above and below colors are serialized (#6763)

• Fix issues with Perspective theme and persist config when switching plugins (#6764)

• Do not restore unmodified parameters in config.set triggering undesirable side-effects ([#6772 (#6771)

• Make autoreload module cleanup more robust (#6771)

• Ensure that cache .clear() clears the correct function (#6771)

Documentation

• Various fixes and cleanup of documentation (#6704, #6707, #6710, #6755,)

• Document how display full html document in iframe (#6740)

• Improve Plotly reference documentation (#6751, #6760)

Version 1.4.1

Date: 2024-04-05

This micro-release fixes a number of regressions and other bugs introduced in recent releases and further improves the dashboard builder UI. Additionally it includes some tweaks and polish for the new tutorial material. Many thanks to our new contributor @jrycw, our returning contributors @cdeil and @TheoMathurin and our maintainers @ahuang11, @MarcSkovMadsen, @Hoxbro and @philippjfr for their contributions to this release.

Enhancements

• Allow rendering raw IPython.display output in dashboard builder (#6657)

• Improve snapping behavior and add undo functionality in dashboard builder UI (#6687))

Bug Fixes

• Fix layout persistence issues in dashboard builder (#6602)

• Ensure Perspective loads in notebooks and docs (#6626)

• Allow full reset of dashboard builder layout (#6625)

• Fix issues with VTK colormap serialization (#6651)

• Allow Tabulator HTMLTemplateFormatter to reference multiple columns (#6663)

• Fix loading spinner in converted app without template (#6665)

• Avoid unnecessary rescroll on Column (#6666)

• Fix dynamically updating description tooltips (#6676)

• Ensure Perspective is fully loaded before attempting render (#6689))

• Ensure busy indicators are always reset (#6698)

Styling

• Only apply styling to Bootstrap buttons (#6610)

• Change into a slicker Card button icon (#6638)

• Fix card header margins (#6639)

• Ensure Perspective renders correctly in all browsers (#6664)

Documentation

• Improve layout builder docs (#6601)

• Various Tutorial fixes (#6614, #6669, #6670, #6679)

• Ensure all docs pages are indexed (#6615)

• Document Flexbox.gap parameter (#6616)

• Improve custom template documentation (#6618)

• Improve Layout Builder Docs (#6619)

• Improve PyCharm and Colab notebook documentation (#6599)

• Update gallery endpoint in docs (#6645)

• Various smaller documentation fixes and improvements (#6682, #6690)

Version 1.4.0

Date: 2024-03-25

This minor release packs a punch both in terms of features, the number of enhancements and bug fixes and perhaps most importantly the addition of a set of tutorials that aim to get novices up-to-speed. The main new feature is a so called EditableTemplate which allows arranging dashboards using a drag-and-drop interface and also has strong integration with JupyterLab previews to go from a notebook to a deployed app without having to worry about writing layout code. Next, this release includes a number of need widgets (NestedSelect, DateRangePicker, ButtonIcon), layouts (Feed) and panes (Textual, WebP), and overhauls the autoreload feature with faster and more robust support for reloading entire modules. Lastly this release, along with Param 2.1.0, continues to build on the new reactive expression API making it easy to write reactive expressions and pipelines including support for streaming data with generators. We really appreciate all the work that went into this release and especially want to call out @MarcSkovMadsen's effort in putting together the new tutorial materials. There's more work to do but it's a huge step forward and we're excited to hear your feedback. We want to extend a special thanks to our amazing new crop of new contributors including @atisor73, @Osuwaidi, @suryako, @Davide-sd, @doraaki, @mayonnaisecolouredbenz7, @CTPassion, @J01024, @l3ender and @Coderambling. Next we want to recognize our returning contributors @vaniisgh, @cdeil, @limx0m, and @TheoMaturin, and the finally the dedicated crew of core contributors which include @maximelt, @Hoxbro, @MarcSkovMadsen, @ahuang11, @mattpap and @philippjfr.

Features

• Add EditableTemplate to support dashboard builder UI in Jupyter (#5802)

• Add ChatAreaInput as default text input widget for ChatInterface (#6379)

• Add NestedSelect widget (#5791, #6011)

• Add Panel tutorials (#5525, #6208, #6212, #6388, #6425, #6466, #6491)

• Add DateRangePicker widget (#6027)

• Add Feed layout and use it as layout for ChatFeed (#6031, #6296)

• Add WebP pane (#6035)

• Add ButtonIcon (#6138)

• Add Textual pane (#6181)

Enhancements

• Improve --autoreload by using watchfiles and selectively reloading packages (#5894, #6459) Load loading indicator from file instead of inlining (#6112)

• Allow providing additional stylesheets in card_params (#6242)

• Add scroll options to permanently toggle on layouts (#6266)

• Allow choosing position of frozen columns on Tabulator (#6309)

• Add help message on ChatFeed (#6311)

• Ensure CSS can be applied to every aspect of ChatMessage (#6346)

• Add HoloViz logos as ChatMessage avatars (#6348)

• Add gap parameter to FlexBox (#6354)

• Set default step of DatetimeRangeSlider to 1 minute (#6373)

• Add support for passing objects reference to FlexBox (#6387)

• Allow editable sliders to be embedded (#6391)

• Add message into css_classes to ChatMessage markup (#6407)

• Allow appending objects to the ChatMessage header & footer (#6410)

• Add ability to declare icon label (#6411)

• Add title and settings and fix datetime to Perspective (#6482)

• Warn user if loading extension in VSCode or Colab without jupyter_bokeh (#6485)

• Throttle updates to Boolean indicators (#6481)

• Add ParamRef baseclass for ParamFunction and ParamMethod (#6392)

• Add ability to Skip Param<Ref|Function|Method> updates (#6396)

• Add Param<Ref|Method|Function> and ReactiveExpr to panes module (#6432)

• Set up param.rx display accessor on import (#6470)

• Allow using Carto tiles in DeckGL (#6531)

• Improve VTKJS binary serialization (#6559)

• Ensure component CSS is pre-loaded if possible, avoiding flicker on load (#6563)

Styling

• Ensure navbar toggle icon is correct color in BootstrapTemplate (#6111)

• Change loading background filters to work better in dark themes (#6112)

• Improve styling of FileInput widget (#6479)

• Improve Jupyter Preview error handling and error template (#6496)

• Add scale animation to icons on hover and click (#6376)

• Redesign index pages (#6497)

• Improve Tabulator editor text color in Fast design (#6512)

• Ensure BootstrapTemplate hamburger icon is white (#6562)

Compatibility & Version Updates

• Bump Perspective version to 2.9.0 (#5722)

• Upgrade to Bokeh 3.4.x (#6072)

• Upgrade Vizzu to 0.9.3 (#6476)

• Bump JSONEditor version to 10.0.1 (#6477)

• Upgrade to PyScript Next and Pyodide 0.25.0 in panel convert (#6490)

• Bump vtk.js version to 30.1.0 (#6559)

Bug fixes

• Add resize handler for FloatPanel (#6201)

• Fix serving of global template in notebook (#6210)

• Ensure Tabulator renders in collapsed Card (#6223)

• Fix issues with VTK, VTKVolume and VTKJS due to webgpu renderer (#6244)

• Ensure HTML and other markup panes can be emptied (#6303)

• Ensure collapsed Card does not cause stretching (#6305)

• Ensure notebook preview always uses server resources (#6317)

• Remove animation from loading spinner without spin (#6324)

• Ensure model is only added/removed from Document once (#6342)

• Ensure loading_indicator resets when configured with context manager (#6343)

• Fix modal overflow and resizing issues (#6355)

• Ensure that ripple matches notification size (#6360)

• Fully re-render CodeEditor on render calls ensuring it displays correctly (#6361)

• Ensure FileDownload button has correct height (#6362)

• Ensure HTML model is redrawn if stylesheets is emptied (#6365)

• Allow providing custom template (#6383)

• Ensure Debugger renders without error (#6423)

• Ensure pending writes are dispatched in order and only from correct thread (#6443)

• Ensure layout reuses model if available (#6446)

• Improved exception handler in unlocked message dispatch (#6447)

• Fix display of interactive Matplotlib (#6450)

• Ensure Plotly pane renders and hides correctly in Card (#6468)

• Fix issues rendering widget components with Fast design (#6474)

• Fix binary serialization from JS -> Pyodide (#6490)

• Avoid overeager garbage collection (#6518)

• Fix floating point error in IntRangeSlider (#6516)

• Load JS modules from relative path (#6526)

• Ensure no events are dispatched before the websocket is open (#6528)

• Ensure Markdown parsing does not choke on partial links (#6535)

• Fixes to ensure larger PDFs can be rendered (#6538)

• Ensure IPywidget comms are only opened once (#6542)

• Fixes for message handling in Jupyter Preview context (#6547)

• Fix unnecessary loading of ReactiveHTML resources (#6552)

• Ensure Template.raw_css has higher precedence than default template CSS (#6554)

• Avoid asyncio event loop startup issues in some contexts (#6555)

• Ensure column subset is retained on Tabulator.style (#6560)

• Ensure bokeh mathjax bundle when mathjax extension is loaded in notebook (#6564)

Chat Components

• Ensure ChatInterface respect supplied default user (#6290)

• Ensure ChatMessage internals correctly respect Design (#6304)

• Fix ChatInterface stop button for synchronous functions (#6312)

• Include stylesheets downstream, including layouts in ChatMessage (#6405)

• Ensure ChatMessage header updates dynamically (#6441)

• Ensure streaming ChatMessage on ChatInterface and mention serialize (#6452)

• Ensure ChatInterface supports chat input without value_input parameter (#6505)

• Ensure word breaks to avoid overflow in ChatMessage (#6187, #6509)

• Ensure nested disabled state stays disabled on ChatFeed (#6507)

• Allow streaming None as the initial ChatMessage value (#6522)

Documentation

• Add Roadmap to documentation (#5443)

• Refactor ReactiveHTML docs (#5448, #6358)

• Improve HoloViews reference guide (#6065)

• Improve the user experience for resetting Jupyterlite (#6198)

• Add explanation docs about APIs (#6289, #6469)

• Add section headers to Chat reference documentation (#6370)

• Migrate gallery to new Anaconda DSP instance (#6413)

• Improve home page (#6422)

• Adding AWS deployment to documentation (#6434)

• Update Streamlit comparison (#6467)

• Add logging how-to guide (#6511)

• Document pygments dependency for code syntax highlighting (#6519)

• Add how-to guide on configuring PyCharm (#6525)

Deprecations & Removals

• Remove Ace alias for CodeEditor

• Remove ChatBox which has been replaced by panel.chat components

• Remove HTML.style which is now replaced with HTML.styles

• Remove Trend.title which is now replaced by Trend.name

• Remove Viewable.app which is now replaced with pn.io.notebook.show_server

• Remove Viewable.background which is now replaced with Viewable(styles={'background': ...})

• Remove Viewable.pprint which is now replaced with print(Viewable(...))

Version 1.3.8

Date: 2024-01-24

This patch release fixes an important regression in the 1.3.6 release that resulted in global state to be incorrectly resolved in certain cases. Many thanks to our new contributor @fohrloop and our maintainers @ahuang11, @Hoxbro and @philippjfr for contributing to this release.

Bug fixes

• Ensure ReactiveHTML correctly resets Event parameters (#6247)

• Fix ChatFeed / ChatInterface tests and async generator placeholders (#6245)

• Fix logic when looking up pn.state.curdoc (#6254)

• Handle margin=None in layout sizing mode computation (#6267)

Compatibility

• Updates for compatibility with pandas 2.2 (#6259)

Documentation

• Fix typos and add a cross-reference in docs (User Profiling) (#6263)

• Improve documentation on TextAreaInput (#6264)

Version 1.3.7

Date: 2024-01-19

This patch release focuses on a number of fixes and minor enhancements for the chat components and various other smaller improvements and fixes including docs improvements. In particular we want to highlight the new Ploomber deployment guide contributed by @neelash23. Next we want to welcome @jz314, @fayssalelmofatiche and @neelasha23 as new contributors and welcome back @SultanOrazbayev as a returning contributor. Lastly we want to thank the core contributor team, including @MarcSkovMadsen, @ahuang11, @maximlt, @Hoxbro and @philippjfr for their continued efforts maintaining Panel.

Enhancements

• Add filter_by to ChatMessage.serialize (#6090)

• Support using an SVG for ToggleIcon (#6127)

• Add resizable param to TextAreaInput (#6126)

• Improve date and datetime picker functionality (#6152)

• Add activity indicator to ChatMessage (#6153)

• Lazily import bleach HTML sanitizer (#6179)

Bug fixes

• Fix alignment issues in chat components (#6104, #6135)

• Fix generator placeholder and optimize updates in Chat components (#6105)

• Fix issue with callback future handling on Chat components (#6120)

• Fix bug in Chat interfaces related to pn.state.browser_info (#6122)

• Allow instantiating empty Matplotlib pane (#6128)

• Ensure icon displays inline with text on FileDownload (#6133)

• Fix styling of links in Tabulator fast theme (#6146)

• Fix passing of card_params on ChatFeed (#6154)

• Handle Tabulator.title_formatter if is type dict (#6166)

• Fix per_session caching (#6169)

• Correctly reshape nd-arrays in Plotly pane (#6174)

• Handle NaT values on Perspective pane (#6176)

• Do not rerender output if ReplacementPane object identity is unchanged (#6183)

• Tabulator: fix valuesLookup set up for older list-like editors (#6192)

• Fix pyodide loading message styling issues (#6194)

• More complete patch for the TextEditor to support being rendered in the Shadow DOM (#6222)

• Add guard to Tabulator ensuring that it does not error when it is not rendered ([#6223](https://github.com/holoviz/panel/pull/6223))

• Fix race conditions when instantiating Comm in Jupyter causing notifications to break (#6229, #6234)

• Handle duplicate attempts at refreshing auth tokens (#6233)

Compatibility & Security

• Upgrade Plotly.js to 2.25.3 to address CVE-2023-46308 (#6230)

Documentation

• Add Design and Theme explanation documentation (#4741)

• Fix pyodide execution in documentation

• Fix wrong and broken link (#5988, #6132)

• Use GoatCounter for website analytics (#6117)

• Add Dask How to guide (#4234)

• Fix Material template notebook .show() call (#6137)

• Add missing item in docstring (#6167)

• Ploomber Cloud deployment documentation (#6182)

• Correct duplicate wording (#6188)

• Update JupyterLite Altair example to latest API (#6226)

Version 1.3.6

Date: 2023-12-20

This patch release addresses a major regression in server performance introduced in 1.3.5 along with some additional minor fixes. We want to welcome @nenb as a new contributor and want to thank the maintainers @ahuang11, @maximlt and @philippjfr for their contributions to this release.

Enhancements

• Add explicit size option to ToggleIcon (#6092)

Bug fixes

• Fix execution of OAuth of callback to refresh access_token (#6084)

• Fix ChatReactionIcons alignment and trigger reactions correctly (#6086)

• Change Column scroll_position default value from None to 0 (#6082)

• Fix issue with accumulating callbacks on server (#6091)

• Ensure ReactiveExpr renders in pyodide (#6097)

• Ensure TooltipIcon description can be updated (#6099)

• Fix IPyWidgets rendering in BootstrapTemplate (#6100)

• Fix padding and alignment of FileDownload (#6101)

Version 1.3.5

Date: 2023-12-18

This micro-release fixes a large number of issues, applies some performance optimizations and resolves some regressions introduced in previous micro-releases. The main regressions that were addressed include rendering of ChatMessage reaction icons, the ability to obtain an OAuth access_token if it is not a valid JWT token, and issues with async callbacks. We are very pleased to welcome new contributors @mitulb, @fazledyn-or, @benbarn313 and @vaniisgh and want to thank them for their contributions. We also want to thank @cdeil for continuing to contribute and the maintainer team including @MarcSkovMadsen, @Hoxbro, @maximlt, @ahuang11, @droumis and @philippjfr for their continued efforts.

Enhancements

• Add support for timestamp timezones for ChatMessage (#5961)

• Replace whitelist blacklist with allowlist denylist (#5975)

• Allow stopping respond callbacks midway on ChatInterface (#5962)

• Add support for Image.caption (#6003)

• Improvements for Fast template styling (#6023)

• Replace Player widget unicode icons with SVG for more consistency (#6030)

• Elaborate on ChatInterface callback exception summary (#6046)

• Add ToggleIcon widget (#6034)

• Use minified Tabulator.js (#6060)

• Support rendering GeoDataFrame and GeoSeries in DataFrame pane (#6061)

• Optimize rendering of ChatMessage (#6069)

• Apply smaller optimizations for Viewable and ChatMessage (#6074)

• Add bottom padding to MaterialTemplate (#6075)

• Update mapbox-gl version for DeckGL pane (#6077)

Bug fixes

• Remove duplicate property definition of VizzuChart.config (#5947)

• Remove stray print in Tabulator styler handling (#5944)

• Fix bug when clearing pn.cache before anything has been cached (#5981)

• Fix obj.save() when threading is enabled (#5993)

• Fix Matplotlib responsiveness and improve reference notebook (#5973)

• Gracefully handle non-decodable access_token (#5994)

• Ensure onload callbacks scheduled during or after load are still executed (#6005)

• Don't attempt to set Tabulator text_align on Bokeh formatters that don't support it (#6010)

• Correctly set error page to be rendered on auth failure (#6014)

• Fix ChatInterface post callback for default (#5998)

• Ensure matplotlib backend is set correctly in pyodide worker (#6029)

• Synchronously create Document patch message to avoid race conditions (#6028)

• Do not inline CSS if it can be loaded from CDN (#6039)

• Fix ChatMessage reactions icon rendering (#6034)

• Fix issues with ChatInterface stop ensuring send button is re-enabled and placeholder removed (#6033)

• Ensure that Design does not override properties on HoloViews pane (#6051)

• Ensure async callbacks correctly dispatch events when Websocket is locked (#6052)

• Fix state.add_periodic_callback when callback is async (#6053)

• Do no update objects inplace unless explicitly requested fixing issues with non-updating components (#6055)

• Update sizing of Panel models dynamically (#6054)

• Make panel.chat.langchain import lazy improving import time (#6056)

• Change prominence of TooltipIcon (#6057)