Release Notes

2023.05.01

Added the xterm attribute to py-config. When set to True or xterm, an (output-only) xterm.js terminal will be used in place of the default py-terminal.
The default version of Pyodide is now 0.23.2. See the Pyodide Changelog for a detailed list of changes.
Added the @when decorator for attaching Python functions as event handlers
The py-mount attribute on HTML elements has been deprecated, and will be removed in a future release.

Added logic to react to py-* attributes changes, removal, py-* attributes added to already live nodes but also py-* attributes added or defined via injected nodes (either appended or via innerHTML operations). (#1435)

Added the ability to optionally use <script type="py">, <script type="pyscript"> or <script type="py-script"> instead of a <py-script> custom element, in order to tackle cases where the content of the <py-script> tag, inevitably parsed by browsers, could accidentally contain HTML able to break the surrounding page layout. (#1396)

Added a docked field and attribute for the <py-terminal> custom element, enabled by default when the terminal is in auto mode, and able to dock the terminal at the bottom of the page with auto scroll on new code execution.

Restored the output attribute of py-script tags to route sys.stdout to a DOM element with the given ID. (#1063)
Added a stderr attribute of py-script tags to route sys.stderr to a DOM element with the given ID. (#1063)

The output attribute of py-repl tags now specifies the id of the DOM element that sys.stdout, sys.stderr, and the results of a REPL execution are written to. It no longer affects the location of calls to display()
Added a stderr attribute of py-repl tags to route sys.stderr to a DOM element with the given ID. (#1106)
Resored the output-mode attribute of py-repl tags. If output-mode == 'append', the DOM element where output is printed is not cleared before writing new results.
Load code from the attribute src of py-repl and preload it into the corresponding py-repl tag by use the attribute str in your py-repl tag(#1292)
<py-repl> elements now have a getPySrc() method, which returns the code inside the REPL as a string.(#1516)

Plugins may now implement the beforePyReplExec() and afterPyReplExec() hooks, which are called immediately before and after code in a py-repl tag is executed. (#1106)

introduced the new experimental execution_thread config option: if you set execution_thread = "worker", the python interpreter runs inside a web worker
worker support is still very experimental: not everything works, use it at your own risk

Fixes #1280, which describes the errors on the PyRepl tests related to having auto-gen tags that shouldn't be there.

Fixed an issue where pyscript would not be available when using the minified version of PyScript. (#1054)
Fixed missing closing tag when rendering an image with display. (#1058)
Fixed a bug where Python plugins methods were being executed twice. (#1064)

When adding a py- attribute to an element but didn't added an id attribute, PyScript will now generate a random ID for the element instead of throwing an error which caused the splash screen to not shutdown. (#1122)
You can now disable the splashscreen by setting enabled = false in your py-config under the [splashscreen] configuration section. (#1138)

Fixed 'Direct usage of document is deprecated' warning in the getting started guide. (#1052)
Added reference documentation for the py-splashscreen plugin (#1138)
Adds doc for installing tests (#1156)
Adds docs for custom Pyscript attributes (py-*) that allow you to add event listeners to an element (#1125)

The py-config runtimes to specify an interpreter has been deprecated. The interpreters config should be used instead. (#1082)
The attributes pys-onClick and pys-onKeyDown have been deprecated, but the warning was only shown in the console. An alert banner will now be shown on the page if the attributes are used. They will be removed in the next release. (#1084)
The pyscript elements py-button, py-inputbox, py-box and py-title have now completed their deprecation cycle and have been removed. (#1084)
The attributes pys-onClick and pys-onKeyDown have been removed. Use py-click and py-keydown instead (#1361)