pywebview

⚡ Features

• [All] New window.moved event. Thanks @irtimir

🚀 Improvements

• [EdgeChromium] Remove The system cannot find the file specified - Microsoft Edge WebView2 Runtime Registry path: Computer\HKEY_CURRENT_USER\Microsoft\EdgeUpdate\Clients{F3017226-FE2A-4295-8BDF-00C3A9A7E4C5} error message displayed in debug mode.
• [CEF] error.log is no longer deleted when in debug mode.

🐞 Bug fixes

• [All] Fix evaluate_js_async crash and program termination prevention. Thanks @detritophage.
• [WinForms] Fix form initialization for pythonnet 3. Thanks @irtimir
• [CEF] Fix errorous script execution in evaluate_js, so that further script do not get stuck. Thanks @irtimir
• [CEF] Fix master uid not found error on startup.
• [QT] Remove 'Empty key passed' messages. Thanks @TomFryers
• [QT] PySide6 backend not working. Thanks @sbbosco
• [QT] Prevent 'Release of profile requested but WebEnginePage still not deleted. Expect troubles !' message on close. Thanks @sbbosco

🐞 Bug fixes

• [Winforms] Support for Edge Chromium v100. Thanks @greper.

🐞 Bug fixes

• [Cocoa] Fix closing window

• Fix [CEF] Exception on start

• New [All] Python 3.6 is the minimum supported version from now on.
• New [All] minimized, maximized, restored, resized events. Thanks @BillBridge for sponsorship.
• New [All] evaluate_js async support. evaluate_js(code, callback) can evaluate promises via an optional callback parameter.
• New [All] Events moved to its own window.events namespace (e.g. window.loaded → window.events.loaded). Old events are supported throughout 3.x and will be removed in 4.0.
• New [All] window.resize(width, height, fix_point) has now an optional parameter fix_point that controls in respect to which point the window is resized.
• New [All] MSHTML and EdgeHTML are deprecated. No further development will be done on these renderers.
• New [Winforms] Focus webview on start or window activate events.
• New [EdgeChromium] Custom user agent support.
• New [EdgeChromium] Window transparency support. Mouse and keyboards events are not supported in transparent. Thanks @odtian.
• New [CEF] Ability to pass custom CEF browser settings. Thanks @Rolf-MP.
• Improvement [EdgeChromium] Support non-elevated installations of WebView2. Thanks @ultrararetoad.
• Improvement [EdgeChromium] Better support for Edge Chromium runtime detectiom. Thanks @r-muthu-saravanan.
• Improvement [EdgeChromium] WebView2 runtime updated to
• Improvement [QT] Pyside support via PyQT wrapper. Thanks @tshemeng.
• Fix [Cocoa] Make Ctrl-C (SIGINT) work on Cocoa when running from the command line
• Fix [EdgeChromium] Fix `load_html. Thanks @sbbosco.
• Fix [Cocoa] Fix cancelling of closing the window in the closing event Thanks @fizzadar.
• Fix [QT] Fix simultaneous calls to JS API.
• Fix [GTK] Fix concurrency issues with get_size, get_position and get_current_url.

• New [All] Get information about available screens via new webview.screens property.
• New [All] Per window localization. Thanks @fizzadar.
• New [All] Window closing can be cancelled by returning False from a closing event handler. #744.
• Fix [All] Debug mode cannot be set under certain conditions. #628
• Improvement [All] Selected web renderer printed in Python console in debug mode.
• Improvement [All] JS API serialization logic. Thanks @peter23
• Improvement [EdgeChromium] Chromium runtime updated to version 1.0.774.44. Thanks @sbbosco.
• Improvement [EdgeChromium] Custom user agent support.
• Fix [WinForms] Icon handling logic to make pywebview compatible with pystray. #720. Thanks @simonrob
• Fix [EdgeChromium] Change webview component to transparent. Thanks @ODtian
• Fix [CEF] Fix exception when destroying window
• Fix [Cocoa] cmd+w bypasses exit confirmation dialogue. #698. Thanks @fizzadar
• Fix [Cocoa] Fix window coordinate calculation logic when moving a window.
• Fix [MSHTML] Fix drag_region
• Fix [MSHTML] Fix window.alert

• New [Windows] WebView2 Chromium support. Thanks sbbosco. #521.
• Fix [All] Exception with HTML checkboxes and get_elements. #622.
• Fix [All] pystray compatibility. Thanks AlexCovizzi. #486.
• Fix [All] expose methods instead of all callables for JS API objects. Thanks jgentil. #629.
• Fix [EdgeHTML] Make returning results of evaluate_js more robust. Thanks sbbosco.
• Fix [QT] KDE_FULL_SESSION not being used. Thanks Maltzur.
• Fix [Cocoa] Unicode filenames for input files.
• Improvement [Cocoa] Only install the specific pyobjc packages required. Thanks Fizzadar.
• Improvement [Cocoa] Add support for default document navigation and window handling shortcut keys . Thanks ikhmyz and Fizzadar

• Fix [EdgeHTML] Server middleware handling
• Fix [EdgeHTML] file:// url handling

• [EdgeHTML] Fix content not displaying with local URLs or local HTTP server
• [Cocoa] Fix arrow keys not responding in text input fields. Thanks awesomo4000

• Fix [Cocoa] Save dialog not working #578.
• Fix [Cocoa] Error sound being played when pressing keys on macOS #566.

• Fix [All] Load html triggers error - resolve_url() missing 1 required positional argument: 'should_serve' #562.
• Fix [Cocoa/GTK] Access window size on closing #573.
• Fix [GTK] Save file dialog now returns a string instead of a tuple.

Fix Unable to start on Windows.

• New [All] Brand-new WSGI based internal HTTP server. Thanks @astronouth7303.
• New [All] Transparent windows. Not available on Windows.
• New [All] Allow pywebview window to be on top of other windows.
• New [All] Custom window drag region using CSS classes. Thanks @Fizzadar.
• New [All] Custom user-agent support. Thanks @tognee.
• Fix [All] Python function not triggered using JS #458.
• Fix [All] window methods do not work in loaded event #528.
• Fix [Cocoa] Caption bar and window control buttons are now hidden In frameless mode.
• Fix [CEF] CEF window resize hang #484.
• Fix [MSHTML] Fix easy drag in frameless mode.
• Fix [EdgeHTML] Do not show admin prompt for non-local URLs.
• Fix [GTK] Fix threading issues with recentish versions of PyGObject
• Fix [QT] Fix opening web inspecting in debug mode

Released 24/01/2020

• New [All] Window x, y, width and height properties to retrieve coordinates and dimensions of the window. Thanks @Fizzadar
• New [All] window.expose(func) an ability to expose an arbitrary function to the JS realm, also during the runtime.
• Improvement [All] JS API methods can now accept an arbitrary number of arguments
• Improvement [All] Exceptions thrown in a JS API method is now raised in Javascript via its promise.
• Improvement [All] Exceptions thrown in window event handlers are now caught and logged.
• Improvement [All] Random port assigned by the built-in HTTP server can be retrieved via webview.http_server.port
• Improvement [QT] Microphone/webcam are enabled by default. Thanks @dtcooper
• Improvement [QT] Default debugger port is changed to 8228. Thanks @melvinkcx
• Improvement [CEF] Ability to pass custom CEF settings via webview.platforms.cef.settings. See example for details.
• Fix [All] Built-in HTTP server is properly restarted when using window.load_url
• Fix [Cocoa] New window position is correctly calculated when using window.move
• Fix [EdgeHTML] window.alert fix

Released 04/11/2019

• New [All] Window minimize/restore functionality. Ability to show window minimized on startup.
• New [All] Window hide/show functionality. Ability to show window hidden on startup.
• New [All] Window move functionality. Ability to set window coordinates on startup. Thanks @adbenitez.
• New [All] New window.pywebviewreadyDOM event that is thrown when window.pywebview is available.
• New [All] Links opened via window.open are opened in a new browser window.
• Fix [All] Fix concurrent invocations of JS API functions.
• Fix [All] Fix unescaped single quote in JS API calls.
• Fix [All] Built-in HTTP server is now multi-threaded. This fixes stalling HTTP requests in some cases.
• Improvement [All] window.set_window_size is deprecated in favour to window.resize.
• Improvement [All] Exceptions are now handled in JS API functions and rerouted to the function promise catch method.
• Improvement [All] Suppress built-in HTTP server logging. Logging is active only in the debug mode.
• Fix [CEF] Fix deadlock occuring when trying to access window.pywebview object right after the
• Fix [CEF] High DPI fix resulting in a small window appearing inside the main window
• Fix [EdgeHTML] Unicode error when loading HTML
• Fix [MSHTML] get_elements failing
• Fix [MSHTML] console.log not writing to Python console in debug mode
• Fix [MSHTML] Forcing MSHTML via gui=mshtml is now possible. ¯\_(ツ)_/¯

Released 17/08/2019

• Fix [All] Prevent JSON like strings being converted to JSON objects when returning JS API calls. #352
• Fix [Windows] HTTP server is now used by default for local URLs and HTML for EdgeHTML. This fixes a PermissionDenied error, when the directory the executable is in is not writable.
• Fix [Tests] Tests now fail on an exception occuring in a thread.

3.0.1

Released 25/07/2019

• Fix [All] Don't escape line breaks in result of js_bridge_call. Thanks @kvasserman.
• Fix [Windows] Support for Pyinstaller noconsole mode
• Fix [Windows] Fix Windows version detection with frozen executables.
• Fix [Windows] Open folder dialog now supports directory argument.
• Fix [QT] Workaround for segmentation fault on closing the main window. Thanks @kvasserman.
• Fix [pytest] Fix for pytest warning about invalid escape sequence

• New [All] New API. The API is not compatible with older versions of pywebview. See https://pywebview.flowrl.com for usage details. #272
• New [All] Built-in HTTP server. #260
• New [All] Autogenerated CSRF token exposed as window.pywebview.token. #316
• New [All] get_elements function to retrieve DOM nodes. #292
• New [All] New event system that lets you to subscribe to events. loaded and shown events are implemented. #201
• New [Windows] EdgeHTML support. Thanks @heavenvolkoff. #243
• Fix [Windows] Fullscreen mode. #338
• Fix [GTK] Better Javascript support for recent version of WebKit2
• Fix [CEF] Support for PyInstaller in onefile mode

• New [All] Support for frameless windows. #169
• Fix [Windows] Fix broken installation of v2.3 #314

• New [All] Ability to resize window after creation webview.set_window_size(width, height). Thanks @aprowe #274
• New [Windows] Chrome Embedded Framework (CEF) support #15
• Improvement [All] pywebview does not interfer with Python's logger configuration #295
• Fix [All] Empty DOM issues when window is created without a URL #285
• Improvement [macOS] Web renderer upgraded to WKWebView
• Improvement [macOS] Add support for Mojave dark mode
• Fix [macOS] Problem with handling paths containing spaces #283
• Fix [QT] Better support for QTWebKit and QTWebChannel #304
• Improvement [QT] Remove support for QT4
• Fix [GTK] Thrown exception not Python 2 compatible #277