Version 0.14.0

This release focuses on three main themes:

• Support for running Panel apps entirely in the browser using WebAssembly (via Pyodide and PyScript)
• Improvements in the app-user experience by making it easier to build responsive and performant applications
• Improvements in the developer experience through static typing and docstrings.

Many, many thanks to everyone who filed issues or contributed to this release. In particular we would like to thank @janimo, @xavArtley, @thuydotm, @jmosbacher, @dmarx, @2WoLpH, @ipopa144, @sdc50 for contributions and @philippjfr, @hoxbro, @maximlt, and @MarcSkovMadsen for ongoing maintenance and development.

Features

• Add support for converting Panel apps to pyscript/pyodide (#3817, #3830, #3851, #3856, #3857, #3858, #3860, #3861, #3863, #3864, #3868, #3878)
• Manage our own CDN to improve performance and reliability for delivering JS payloads (#3867, #3870)
• Add ability to defer_load of components (#3882)
• Add pn.widget helper function (#1826, #3589)
• Add config.exception_handler to easily capture, log and notify users about errors (#3893)
• Implement pn.cache function for memoization support (#2411)
• Rewrite server extension to run Panel applications in kernels so that previews run in the same environment as the deployed app (#3763)
• Add ability to define authorization callback (#3777)
• Support memray profiler (#3509)
• Add liveness endpoint (#3832)
• Add ability to configure exception handler (#3896)

Enhancements

• Ensure OAuth redirects to requested app and retains query arguments (#3555)
• Add extension entry point (#3738)
• Update Admin Logs page to use Tabulator (#3694)
• Ensure location.unsync unsets query params (#3806)
• Allow None value on numeric sliders and LiteralInput (#3174)
• Allow serving admin panel with pn.serve (#3798)
• Improve ReactiveHTML loop support and validation (#3813)
• Support declaring Perspective.plugin_config pane (#3814)
• Do not flicker busy indicator during --autoreload check (#3804)
• Improve robustness of state.curdoc in threaded and async contexts (#3776, #3810, #3834)
• Support datetime bounds for DatetimePicker and DatetimeRangePicker (#3788)
• Allow setting the Oauth provider using environment variables (#3698)
• Implement Player.value_throttled (#3756)
• Ensure that URL query parameters are preserved during OAuth (#3656)
• Improve Markdown code syntax highlighting (#3758)
• Ensure components do not re-render if background or loading parameters change (#3599)
• Add ability to define admin dashboard plugins (#3668)
• Do not calculate embed state for disabled widgets (#3757)
• Add hard bounds to editable sliders (#3739)
• Add bundling of shared resources (#3894)
• Add Tabulator as default param.DataFrame widget (#3912)

Documentation

• Overhaul documentation (#3568)
• Improve Fast Template docstrings (#3570)
• Reorganize docs and convert static notebooks to Markdown (#3875, #3833)
• Add DevelopingCustomModels to the webpage (#3710)
• Improve typing (#3561, #3562, #3592, #3604, #3714, #3729)

Compatibility & Version updates

• Support ipywidgets>=8.0 (#3782)
• Bump jsoneditor package (#3838)
• Upgrade to Tabulator 5.3.2 (#3784)
• Improve Django compatibility (#3843, #3835)
• Remove all usage of deprecated Pane

Bugs

Server

• Ensure closed websocket does not cause errors
• Handle session and websocket close cleanly (#3769)
• Fix prefix handling for admin page (#3809)
• Support admin dashboard in multi-process deployments (#3812)
• Improve document cleanup when not invoked using server_destroy (#3842)
• Ensure pn.state.execute dispatches immediately if possible (#3859)
• Ensure autoload.js resources are appropriately prefixed (#3873)

Notebook

• Fix support for copying cells and creating new views in JupyterLab (#3652)
• Ensure output renders in VSCode notebook with latest ipywidgets (#3765)
• Resolve issues with Jupyter slowdown due to event_loop patching on Windows (#3770)
  • Ensure old comm managers do not raise errors in notebook (#3853)
  • Simplify rendering of ipywidget (#3937)

Tabulator

• Do not re-render Tabulator on css_classes or background change (#3598)
• Ensure expand icon updates on Tabulator.expanded change (#3703)
• Update page Parameter when pagination is 'local' (#3704)
• Do not apply sorters on Tabulator cell edits (#3744)
• Ensure Tabulator.controls renders (#3768)
• Ensure correctness of event row and selection indices in Tabulator (#3771, #3841)
• Fix issues with frontend and backend sorters being out of sync in Tabulator (#3825, #3839)
• Fix default values of a list header filter in Tabulator (#3826)
• Fix the edit event with a python filter in Tabulator (#3829)
• Disable client-side date filtering on Tabulator (#3849)
• Support editing of pandas masked array dtypes in Tabulator (#3850)
• Fix issues editing a cell when client-side filtering applied (#3852)
• Do not recompute data when local pagination is enabled (#3854)
• Don't skip filtering when the column name is undefined (#3862)

Misc

• Fix FileInput.save (#3579)
• Fix issues with Matplotlib.high_dpi option (#3591, #3594)
• Ensure layout recomputes on HTML/Markdown re-rerender (#3616)
• Allow overriding all widget parameters on Param pane (#3754)
• Ensure DatePicker start/end are transformed when jslinked (#3759)
• Ensure notifications can be enabled without a template (#3820)
• Ensure ReactiveHTML inline callbacks on loop variables return correct node (#3840)
• Ensure that Perspective does not take precedence on empty dict (#3936)
• Improve sizing_mode behavior when width/height are specified (#3955)
• Do not load notyf resources unless notifications are enabled (#3958)