Version 1.4.0 CHANGELOG

[philippjfr]

Features

• Add Panel tutorials (Add Panel tutorials #5525, Various docs fixes for new materials #6208, Tutorial follow up #6388, Finalize Basic Tutorials #6425, Mature intermediate tutorials #6466, Add intermediate Todo App tutorial #6491, )
• Add EditableTemplate to support dashboard builder UI in Jupyter (Fall back to rendering cell outputs if notebook does not define servable #5802)
• Add NestedSelect widget (Add nested select #5791, Add NestedSelect dynamic levels #6011)
• Improve --autoreload by using watchfiles and selectively reloading packages (Use watchfiles library for detecting changed files #5894, Improve autoreload of external packages #6459)
• Add DateRangePicker widget (Add DateRangePicker widget #6027)
• Add Feed layout and use it as layout for ChatFeed (Add pn.Feed to allow buffering of feed objects #6031, Use pn.Feed internally for ChatFeed #6296)
• Add WebP pane (Add Support for webp format #6035)
• Add ButtonIcon (Implement ButtonIcon and achieve parity with Button/Toggle widgets #6138)
• Add Textual pane (Add Textual pane #6181)
• Add ChatAreaInput as default text input widget for ChatInterface (Add chat area input and integrate #6379)

Enhancements

• Load loading indicator from file instead of inlining (Load loading indicator from file instead of inlining #6112)
• Allow providing additional stylesheets in card_params (Allow providing additional stylesheets in card_params #6242)
• Add scroll options to permanently toggle on layouts (Add scroll options to permanently toggle on scrollbar #6266)
• Allow choosing position of frozen columns on Tabulator (Choose position to freeze tabulator columns. #6309)
• Add help message on ChatFeed (Add default help user logo and help_text to ChatFeed #6311)
• Ensure CSS can be applied to every aspect of ChatMessage (Stylize chat components #6346)
• Add HoloViz logos as ChatMessage avatars (Add HoloViz logos as ChatMessage avatars #6348)
• Add gap parameter to FlexBox (Add "gap" property to FlexBox #6354)
• Set default step of DatetimeRangeSlider to 1 minute (Set step in DatetimeRangeSlider to 1 minute #6373)
• Add support for passing objects reference to FlexBox (Add support for passing objects reference to FlexBox #6387)
• Allow editable sliders to be embedded (Allow Editable slider to be embedded #6391)
• Add message into css_classes to ChatMessage markup (Add message into css_classes to ChatMessage's markup #6407)
• Allow appending objects to the ChatMessage header & footer (Allow appending objects to the ChatMessage header & footer #6410)
• Add ability to declare icon label (Add icon name #6411)
• Add title and settings and fix datetime to Perspective (Add title and settings and fix datetime to Perspective #6482)
• Warn user if loading extension in VSCode or Colab without jupyter_bokeh (Warn user if loading extension in VSCode or Colab without jupyter_bokeh #6485)
• Throttle updates to Boolean indicators (Throttle updates to Boolean indicators #6481)
• Add ParamRef baseclass for ParamFunction and ParamMethod (Add ParamRef baseclass for ParamFunction and ParamMethod #6392)
• Add ability to Skip Param<Ref|Function|Method> updates (Add ability to Skip Param<Ref|Function|Method> updates #6396)
• Add Param<Ref|Method|Function> and ReactiveExpr to panes module (Add Param<Ref|Method|Function> and ReactiveExpr to panes #6432)
• Set up param.rx display accessor on import (Override param.rx display accessor on import #6470)
• Allow using Carto tiles in DeckGL (Allow Carto tiles in DeckGL #6531)

Styling

• Ensure navbar toggle icon is correct color in BootstrapTemplate (Update bootstrap.html - Changing navbar toggle icon to white #6111)
• Improve styling of FileInput widget (Add stylesheet to fileinput button #6479)
• Improve Jupyter Preview error handling and error template (Improve Jupyter Preview error handling and error template #6496)
• Add scale animation to icons on hover and click (Add scale animation to icon on hover and active class #6376)
• Redesign index pages (Redesign index pages #6497)
• Improve Tabulator editor text color in Fast design (Improve Tabulator editor text color in Fast theme #6512)

Compatibility & Version Updates

• Bump Perspective version to 2.8.0 (Bump perspective version to 2.8.0 #5722)
• Support for Bokeh 3.4 (Support for Bokeh 3.4 #6072)
• Upgrade Vizzu to 0.9.3 (Upgrade Vizzu to 0.9.3 #6476)
• Bump JSONEditor version to 10.0.1 (Bump JSONEditor version to 10.0.1 #6477)
• Upgrade to PyScript Next and Pyodide 0.25.0 in panel convert (Fix binary serialization from JS -> Pyodide #6490)

Bug fixes

• Add resize handler for FloatPanel (Add resize handler for FloatPanel #6201)
• Fix serving of global template in notebook (Fix serving of global template in notebook #6210)
• Ensure Tabulator renders in collapsed Card (Tabulator: prevent JS error #6223)
• Ensure ChatInterface respect supplied default user (Don't pop ChatInterface variables #6290)
• Ensure HTML and other markup panes can be emptied (Ensure HTML and other markup panes can be emptied #6303)
• Ensure ChatMessage internals correctly respect Design (Ensure ChatMessage internals are visible to Panel #6304)
• Ensure collapsed Card does not cause stretching (Ensure collapsed card does not cause stretching #6305)
• Ensure notebook preview always uses server resources (Improve developer experience for notebook preview #6317)
• Remove animation from loading spinner without spin (Remove animation from loading spinner without spin #6324)
• Ensure model is only added/removed from Document once (Only add/remove model from Document once #6342)
• Ensure loading_indicator resets when configured with context manager (Ensure that once instantiated loading_indicator is disconnected from default #6343)
• Fix modal overflow and resizing issues (Fix modal overflow and resizing issues #6355)
• Ensure that ripple matches notification size (Ensure that ripple matches notification size #6360)
• Fully re-render CodeEditor on render calls ensuring it displays correctly (Fully re-render Ace editor on render calls #6361)
• Ensure FileDownload button has correct height (Ensure FileDownload button has correct height #6362)
• Ensure HTML model is redrawn if stylesheets is emptied (Redraw if stylesheets is empty #6365)
• Allow providing custom template (Catch a ValueError in order to load custom templates #6383)
• Ensure Debugger renders without error (Ensure Debugger renders without error #6423)
• Ensure ChatMessage header updates dynamically (Fix dynamically setting header in ChatFeed #6441)
• Ensure pending writes are dispatched in order and only from correct thread (Ensure pending writes are dispatched in order and only from correct thread #6443)
• Ensure layout reuses model if available (Fixes for layout caching and sizing #6446)
• Improved exception handler in unlocked message dispatch (Improved exceptional handler in unlocked message dispatch #6447)
• Fix display of interactive Matplotlib (Fix display of interactive Matplotlib #6450)
• Ensure streaming ChatMessage on ChatInterface and mention serialize (Fix stream ChatMessage for ChatInterface and mention serialize #6452)
• Ensure Plotly pane renders and hides correctly in Card (Ensure Plotly pane renders and hides correctly in Card #6468)
• Fix issues rendering widget components with Fast design (Do not resolve refs on FastWrapper #6474)
• Fix binary serialization from JS -> Pyodide (Fix binary serialization from JS -> Pyodide #6490)
• Avoid overeager garbage collection (Avoid overeager garbage collection #6518)
• Fix floating point error in IntRangeSlider (Fix floating point error in IntRangeSlider #6516)
• Load JS modules from relative path (Load JS module from relative path #6526)
• Ensure no events are dispatched before the websocket is open (Ensure no events are dispatched before the websocket is open #6528)
• Ensure Markdown parsing does not choke on partial links (Ensure markdown parsing does not choke on partial links #6535)

Chat Components

• Fix ChatInterface stop button for synchronous functions (Fix stop button for sync #6312)
• Include stylesheets downstream, including layouts in ChatMessage (Include stylesheets downstream, including layouts in ChatMessage #6405)
• Ensure ChatInterface supports chat input without value_input parameter (Fix ChatInterface send with widget with no value_input #6505)
• Ensure word breaks to avoid overflow in ChatMessage (Set ChatMessage min_width_0 and break anywhere #6187, ChatMessage word break on long continuous words #6509)
• Ensure nested disabled state stays disabled on ChatFeed (Fix nested disabled state for ChatFeed #6507)
• Allow streaming None as the initial ChatMessage value (Fix stream None base message #6522)

Documentation

• Add Roadmap to documentation (Add Roadmap to documentation #5443)
• Refactor ReactiveHTML docs (Refactor ReactiveHTML docs #5448, Fix reactive html issues #6358)
• Improve HoloViews reference guide (Improve HoloViews reference guide #6065)
• Improve the user experience for resetting Jupyterlite (Improve the user experience for resetting Jupyterlite. #6198)
• Add explanation docs about APIs (Add explanation docs about APIs #6289, Various fixes to API explanation section #6469)
• Add section headers to Chat reference documentation (Add section headers to Chat docs #6370)
• Migrate gallery to new Anaconda DSP instance (Link to the new Anaconda DSP instance #6413)
• Improve home page (Improve home page #6422)
• Adding AWS deployment to documentation (Adding AWS deployment to documentation #6434)
• Update Streamlit comparison (Update Streamlit comparision #6467)
• Add logging how-to guide (Add logging how-to guide #6511)
• Document pygments dependency for code syntax highlighting (Mention code highlighting in Markdown and ChatFeed #6519)
• Add how-to guide on configuring PyCharm (How-to Configure PyCharm Guide #6525)

Deprecations

• 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(...))

[MarcSkovMadsen]

I believe the Getting Started guide has also been improved: More engaging, polished and targeting both notebook users and app developers.