Bumped version to 2025.8.1 (#2369 )

Updated Polyscript to its latest (#2364 )
* Fix #2360 - Better shared env/setup handling (#2361) * Updated Polyscript to its latest * [pre-commit.ci] auto fixes from pre-commit.com hooks for more information, see https://pre-commit.ci * changed is_null to a more Pythonic is_none --------- Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>
2025-12-20 02:37:41 -05:00 · 2025-08-07 09:59:11 +02:00 · 2025-08-06 19:23:24 +02:00 · 2025-08-06 14:40:52 +02:00 · 2025-07-24 15:03:51 +02:00 · 2025-07-11 10:56:14 +02:00
64 changed files with 1480 additions and 467 deletions
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -40,7 +40,7 @@ repos:
                - tomli

    - repo: https://github.com/astral-sh/ruff-pre-commit
-      rev: v0.9.6
+      rev: v0.11.8
      hooks:
          - id: ruff
            exclude: core/tests
--- a/.prettierignore
+++ b/.prettierignore
@@ -1,3 +1,4 @@
 ISSUE_TEMPLATE
 *.min.*
 package-lock.json
+bridge/
--- a/README.md
+++ b/README.md
@@ -13,15 +13,15 @@ Using PyScript is as simple as:
        <title>PyScript!</title>
        <link
            rel="stylesheet"
-            href="https://pyscript.net/snapshots/2024.9.2/core.css"
+            href="https://pyscript.net/releases/2025.8.1/core.css"
        />
        <script
            type="module"
-            src="https://pyscript.net/snapshots/2024.9.2/core.js"
+            src="https://pyscript.net/releases/2025.8.1/core.js"
        ></script>
    </head>
    <body>
-        <!-- Use MicroPython to evaluate some Python -->
+        <!-- type mpy (MicroPython) or py (Pyodide) to run some Python -->
        <script type="mpy" terminal>
            print("Hello, world!")
        </script>
--- a/bridge/README.md
+++ b/bridge/README.md
@@ -0,0 +1,57 @@
+# @pyscript/bridge
+
+Import Python utilities directly in JS
+
+```js
+// main thread
+const { ffi: { func_a, func_b } } = await import('./test.js');
+
+// test.js
+import bridge from 'https://esm.run/@pyscript/bridge';
+export const ffi = bridge(import.meta.url, { type: 'mpy', worker: false });
+
+// test.py
+def func_a(value):
+    print(f"hello {value}")
+
+def func_b():
+    import sys
+    return sys.version
+```
+
+### Options
+
+  * **type**: `py` by default to bootstrap *Pyodide*.
+  * **worker**: `true` by default to bootstrap in a *Web Worker*.
+  * **config**: either a *string* or a PyScript compatible config *JS literal* to make it possible to bootstrap files and whatnot. If specified, the `worker` becomes implicitly `true` to avoid multiple configs conflicting on the main thread.
+  * **env**: to share the same environment across multiple modules loaded at different times.
+
+
+## Tests
+
+Run `npx mini-coi .` within this folder to then reach out `http://localhost:8080/test/` that will show:
+
+```
+PyScript Bridge
+------------------
+no config
+```
+
+The [test.js](./test/test.js) files uses the following defaults:
+
+  * `type` as `"mpy"`
+  * `worker` as `false`
+  * `config` as `undefined`
+  * `env` as `undefined`
+
+To test any variant use query string parameters so that `?type=py` will use `py` instead, `worker` will use a worker and `config` will use a basic *config* that brings in another file from the same folder which exposes the version.
+
+To recap: `http://localhost:8080/test/?type=py&worker&config` will show this instead:
+
+```
+PyScript Bridge
+------------------
+3.12.7 (main, May 15 2025, 18:47:24) ...
+```
+
+Please note when a *config* is used, the `worker` attribute is always `true`.
--- a/bridge/index.js
+++ b/bridge/index.js
@@ -0,0 +1,150 @@
+/*! (c) PyScript Development Team */
+
+const { stringify } = JSON;
+const { create, entries } = Object;
+
+/**
+ * Transform a list of keys into a Python dictionary.
+ * `['a', 'b']` => `{ "a": a, "b": b }`
+ * @param {Iterable<string>} keys
+ * @returns {string}
+ */
+const dictionary = keys => {
+  const fields = [];
+  for (const key of keys)
+    fields.push(`${stringify(key)}: ${key}`);
+  return `{ ${fields.join(',')} }`;
+};
+
+/**
+ * Resolve properly config files relative URLs.
+ * @param {string|Object} config - The configuration to normalize.
+ * @param {string} base - The base URL to resolve relative URLs against.
+ * @returns {string} - The JSON serialized config.
+ */
+const normalize = async (config, base) => {
+  if (typeof config === 'string') {
+    base = config;
+    config = await fetch(config).then(res => res.json());
+  }
+  if (typeof config.files === 'object') {
+    const files = {};
+    for (const [key, value] of entries(config.files)) {
+      files[key.startsWith('{') ? key : new URL(key, base)] = value;
+    }
+    config.files = files;
+  }
+  return stringify(config);
+};
+
+// this logic is based on a 3 levels cache ...
+const cache = new Map;
+
+/**
+ * Return a bridge to a Python module via a `.js` file that has a `.py` alter ego.
+ * @param {string} url - The URL of the JS module that has a Python counterpart.
+ * @param {Object} options - The options for the bridge.
+ * @param {string} [options.type='py'] - The `py` or `mpy` interpreter type, `py` by default.
+ * @param {boolean} [options.worker=true] - Whether to use a worker, `true` by default.
+ * @param {string|Object} [options.config=null] - The configuration for the bridge, `null` by default.
+ * @param {string} [options.env=null] - The optional shared environment to use.
+ * @param {string} [options.serviceWorker=null] - The optional service worker to use as fallback.
+ * @returns {Object} - The bridge to the Python module.
+ */
+export default (url, {
+  type = 'py',
+  worker = true,
+  config = null,
+  env = null,
+  serviceWorker = null,
+} = {}) => {
+  const { protocol, host, pathname } = new URL(url);
+  const py = pathname.replace(/\.m?js(?:\/\+\w+)?$/, '.py');
+  const file = `${protocol}//${host}${py}`;
+
+  // the first cache is about the desired file in the wild ...
+  if (!cache.has(file)) {
+    // the second cache is about all fields one needs to access out there
+    const exports = new Map;
+    let python;
+
+    cache.set(file, new Proxy(create(null), {
+      get(_, field) {
+        if (!exports.has(field)) {
+          // create an async callback once and always return the same later on
+          exports.set(field, async (...args) => {
+            // the third cache is about reaching lazily the code only once
+            // augmenting its content with exports once and drop it on done
+            if (!python) {
+              // do not await or multiple calls will fetch multiple times
+              // just assign the fetch `Promise` once and return it
+              python = fetch(file).then(async response => {
+                const code = await response.text();
+                // create a unique identifier for the Python context
+                const identifier = pathname.replace(/[^a-zA-Z0-9_]/g, '');
+                const name = `__pyscript_${identifier}${Date.now()}`;
+                // create a Python dictionary with all accessed fields
+                const detail = `{"detail":${dictionary(exports.keys())}}`;
+                // create the arguments for the `dispatchEvent` call
+                const eventArgs = `${stringify(name)},${name}to_ts(${detail})`;
+                // bootstrap the script element type and its attributes
+                const script = document.createElement('script');
+                script.type = type;
+
+                // if config is provided it needs to be a worker to avoid
+                // conflicting with main config on the main thread (just like always)
+                script.toggleAttribute('worker', !!config || !!worker);
+                if (config) {
+                  const attribute = await normalize(config, file);
+                  script.setAttribute('config', attribute);
+                }
+
+                if (env) script.setAttribute('env', env);
+                if (serviceWorker) script.setAttribute('service-worker', serviceWorker);
+
+                // augment the code with the previously accessed fields at the end
+                script.textContent = [
+                  '\n', code, '\n',
+                  // this is to avoid local scope name clashing
+                  `from pyscript import window as ${name}`,
+                  `from pyscript.ffi import to_js as ${name}to_ts`,
+                  `${name}.dispatchEvent(${name}.CustomEvent.new(${eventArgs}))`,
+                  // remove these references even if non-clashing to keep
+                  // the local scope clean from undesired entries
+                  `del ${name}`,
+                  `del ${name}to_ts`,
+                ].join('\n');
+
+                // let PyScript resolve and execute this script
+                document.body.appendChild(script);
+
+                // intercept once the unique event identifier with all exports
+                globalThis.addEventListener(
+                  name,
+                  event => {
+                    resolve(event.detail);
+                    script.remove();
+                  },
+                  { once: true }
+                );
+
+                // return a promise that will resolve only once the event
+                // has been emitted and the interpreter evaluated the code
+                const { promise, resolve } = Promise.withResolvers();
+                return promise;
+              });
+            }
+
+            // return the `Promise` that will after invoke the exported field
+            return python.then(foreign => foreign[field](...args));
+          });
+        }
+
+        // return the lazily to be resolved once callback to invoke
+        return exports.get(field);
+      }
+    }));
+  }
+
+  return cache.get(file);
+};
--- a/bridge/package.json
+++ b/bridge/package.json
@@ -0,0 +1,27 @@
+{
+  "name": "@pyscript/bridge",
+  "version": "0.1.0",
+  "description": "A JS based way to use PyScript modules",
+  "type": "module",
+  "module": "./index.js",
+  "unpkg": "./index.js",
+  "jsdelivr": "./jsdelivr.js",
+  "browser": "./index.js",
+  "main": "./index.js",
+  "keywords": [
+    "PyScript",
+    "JS",
+    "Python",
+    "bridge"
+  ],
+  "author": "Anaconda Inc.",
+  "license": "APACHE-2.0",
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/pyscript/pyscript.git"
+  },
+  "bugs": {
+    "url": "https://github.com/pyscript/pyscript/issues"
+  },
+  "homepage": "https://github.com/pyscript/pyscript#readme"
+}
--- a/bridge/test/index.html
+++ b/bridge/test/index.html
@@ -0,0 +1,33 @@
+<!DOCTYPE html>
+<html lang="en">
+    <head>
+        <meta charset="utf-8">
+        <meta name="viewport" content="width=device-width,initial-scale=1">
+        <title>PyScript Bridge</title>
+        <style>body { font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif; }</style>
+        <link rel="stylesheet" href="https://pyscript.net/releases/2025.5.1/core.css" />
+        <script type="module" src="https://pyscript.net/releases/2025.5.1/core.js"></script>
+        <!-- for local testing purpose only-->
+        <script type="importmap">{"imports":{"https://esm.run/@pyscript/bridge":"../index.js"}}</script>
+        <script type="module">
+          const { ffi: { test_func, test_other, version } } = await import('./test.js');
+
+          console.time("⏱️ first invoke");
+          const result = await test_func("PyScript Bridge");
+          console.timeEnd("⏱️ first invoke");
+
+          document.body.append(
+            Object.assign(
+              document.createElement("h3"),
+              { textContent: result },
+            ),
+            document.createElement("hr"),
+            await version(),
+          );
+
+          console.time("⏱️ other invokes");
+          await test_other("🐍");
+          console.timeEnd("⏱️ other invokes");
+        </script>
+    </head>
+</html>
--- a/bridge/test/remote/index.html
+++ b/bridge/test/remote/index.html
@@ -0,0 +1,40 @@
+<!DOCTYPE html>
+<html lang="en">
+    <head>
+        <meta charset="utf-8">
+        <meta name="viewport" content="width=device-width,initial-scale=1">
+        <title>PyScript Bridge</title>
+        <script type="importmap">
+          {
+            "imports": {
+              "https://esm.run/@pyscript/bridge": "https://esm.run/@pyscript/bridge@latest",
+              "https://esm.run/@pyscript/bridge/test/test.js": "https://esm.run/@pyscript/bridge@latest/test/test.js"
+            }
+          }
+        </script>
+        <style>body { font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif; }</style>
+        <link rel="stylesheet" href="https://pyscript.net/releases/2025.5.1/core.css" />
+        <script type="module" src="https://pyscript.net/releases/2025.5.1/core.js"></script>
+        <script type="module">
+          const cdn_test = 'https://esm.run/@pyscript/bridge/test/test.js';
+          const { ffi: { test_func, test_other, version } } = await import(cdn_test);
+
+          console.time("⏱️ first invoke");
+          const result = await test_func("PyScript Bridge");
+          console.timeEnd("⏱️ first invoke");
+
+          document.body.append(
+            Object.assign(
+              document.createElement("h3"),
+              { textContent: result },
+            ),
+            document.createElement("hr"),
+            await version(),
+          );
+
+          console.time("⏱️ other invokes");
+          await test_other("🐍");
+          console.timeEnd("⏱️ other invokes");
+        </script>
+    </head>
+</html>
--- a/bridge/test/sys_version.py
+++ b/bridge/test/sys_version.py
@@ -0,0 +1,5 @@
+import sys
+
+
+def version():
+    return sys.version
--- a/bridge/test/test.js
+++ b/bridge/test/test.js
@@ -0,0 +1,17 @@
+import bridge from "https://esm.run/@pyscript/bridge";
+
+// for local testing purpose only
+const { searchParams } = new URL(location.href);
+
+// the named (or default) export for test.py
+export const ffi = bridge(import.meta.url, {
+  env: searchParams.get("env"),
+  type: searchParams.get("type") || "mpy",
+  worker: searchParams.has("worker"),
+  config: searchParams.has("config") ?
+    ({
+      files: {
+        "./sys_version.py": "./sys_version.py",
+      },
+    }) : undefined,
+});
--- a/bridge/test/test.py
+++ b/bridge/test/test.py
@@ -0,0 +1,22 @@
+from pyscript import config, RUNNING_IN_WORKER
+
+type = config["type"]
+print(f"{type}-script", RUNNING_IN_WORKER and "worker" or "main")
+
+
+def test_func(message):
+    print("Python", message)
+    return message
+
+
+def test_other(message):
+    print("Python", message)
+    return message
+
+
+def version():
+    try:
+        from sys_version import version
+    except ImportError:
+        version = lambda: "no config"
+    return version()
--- a/core/LICENSE
+++ b/core/LICENSE
@@ -0,0 +1,205 @@
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
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+
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+   END OF TERMS AND CONDITIONS
+
+   APPENDIX: How to apply the Apache License to your work.
+
+      To apply the Apache License to your work, attach the following
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--- a/core/package-lock.json
+++ b/core/package-lock.json
--- a/core/package.json
+++ b/core/package.json
@@ -1,6 +1,6 @@
 {
    "name": "@pyscript/core",
-    "version": "0.6.39",
+    "version": "0.6.70",
    "type": "module",
    "description": "PyScript",
    "module": "./index.js",
@@ -35,11 +35,14 @@
        "./storage": {
            "import": "./dist/storage.js"
        },
+        "./service-worker": {
+            "import": "./dist/service-worker.js"
+        },
        "./package.json": "./package.json"
    },
    "scripts": {
        "server": "echo \"➡️  TESTS @ $(tput bold)http://localhost:8080/tests/$(tput sgr0)\"; npx static-handler --coi .",
-        "build": "export ESLINT_USE_FLAT_CONFIG=true;npm run build:3rd-party && npm run build:stdlib && npm run build:plugins && npm run build:core && npm run build:tests-index && if [ -z \"$NO_MIN\" ]; then eslint src/ && npm run ts && npm run test:integration; fi",
+        "build": "export ESLINT_USE_FLAT_CONFIG=true;npm run build:3rd-party && npm run build:stdlib && npm run build:plugins && npm run build:core && npm run build:tests-index && if [ -z \"$NO_MIN\" ]; then eslint src/ && npm run test:integration; fi",
        "build:core": "rm -rf dist && rollup --config rollup/core.config.js && cp src/3rd-party/*.css dist/",
        "build:flatted": "node rollup/flatted.cjs",
        "build:plugins": "node rollup/plugins.cjs",
@@ -64,40 +67,40 @@
    "dependencies": {
        "@ungap/with-resolvers": "^0.1.0",
        "@webreflection/idb-map": "^0.3.2",
+        "@webreflection/utils": "^0.1.1",
        "add-promise-listener": "^0.1.3",
        "basic-devtools": "^0.1.6",
-        "polyscript": "^0.16.22",
-        "sabayon": "^0.6.6",
+        "polyscript": "^0.18.9",
        "sticky-module": "^0.1.1",
        "to-json-callback": "^0.1.1",
        "type-checked-collections": "^0.1.7"
    },
    "devDependencies": {
-        "@codemirror/commands": "^6.8.0",
-        "@codemirror/lang-python": "^6.1.7",
-        "@codemirror/language": "^6.11.0",
+        "@codemirror/commands": "^6.8.1",
+        "@codemirror/lang-python": "^6.2.1",
+        "@codemirror/language": "^6.11.2",
        "@codemirror/state": "^6.5.2",
-        "@codemirror/view": "^6.36.4",
-        "@playwright/test": "^1.51.1",
-        "@rollup/plugin-commonjs": "^28.0.3",
+        "@codemirror/view": "^6.38.1",
+        "@playwright/test": "^1.54.2",
+        "@rollup/plugin-commonjs": "^28.0.6",
        "@rollup/plugin-node-resolve": "^16.0.1",
        "@rollup/plugin-terser": "^0.4.4",
-        "@webreflection/toml-j0.4": "^1.1.3",
+        "@webreflection/toml-j0.4": "^1.1.4",
        "@xterm/addon-fit": "^0.10.0",
        "@xterm/addon-web-links": "^0.11.0",
        "@xterm/xterm": "^5.5.0",
-        "bun": "^1.2.5",
+        "bun": "^1.2.19",
        "chokidar": "^4.0.3",
        "codedent": "^0.1.2",
-        "codemirror": "^6.0.1",
-        "eslint": "^9.22.0",
+        "codemirror": "^6.0.2",
+        "eslint": "^9.32.0",
        "flatted": "^3.3.3",
-        "rollup": "^4.36.0",
+        "rollup": "^4.46.2",
        "rollup-plugin-postcss": "^4.0.2",
        "rollup-plugin-string": "^3.0.0",
        "static-handler": "^0.5.3",
        "string-width": "^7.2.0",
-        "typescript": "^5.8.2",
+        "typescript": "^5.9.2",
        "xterm-readline": "^1.1.2"
    },
    "repository": {
--- a/core/rollup/core.config.js
+++ b/core/rollup/core.config.js
@@ -53,4 +53,15 @@ export default [
            sourcemap: true,
        },
    },
+    {
+        input: "./src/service-worker.js",
+        plugins: plugins.concat(
+            process.env.NO_MIN
+                ? [nodeResolve(), commonjs()]
+                : [nodeResolve(), commonjs(), terser()],
+        ),
+        output: {
+            file: "./dist/service-worker.js",
+        },
+    },
 ];
--- a/core/src/3rd-party-licenses/codemirror.license.txt
+++ b/core/src/3rd-party-licenses/codemirror.license.txt
@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (C) 2018-2021 by Marijn Haverbeke <marijnh@gmail.com> and others
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
--- a/core/src/3rd-party-licenses/codemirror_commands.license.txt
+++ b/core/src/3rd-party-licenses/codemirror_commands.license.txt
@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (C) 2018-2021 by Marijn Haverbeke <marijn@haverbeke.berlin> and others
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
--- a/core/src/3rd-party-licenses/codemirror_lang-python.license.txt
+++ b/core/src/3rd-party-licenses/codemirror_lang-python.license.txt
@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (C) 2018-2021 by Marijn Haverbeke <marijn@haverbeke.berlin> and others
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
--- a/core/src/3rd-party-licenses/codemirror_language.license.txt
+++ b/core/src/3rd-party-licenses/codemirror_language.license.txt
@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (C) 2018-2021 by Marijn Haverbeke <marijn@haverbeke.berlin> and others
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
--- a/core/src/3rd-party-licenses/codemirror_state.license.txt
+++ b/core/src/3rd-party-licenses/codemirror_state.license.txt
@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (C) 2018-2021 by Marijn Haverbeke <marijn@haverbeke.berlin> and others
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
--- a/core/src/3rd-party-licenses/codemirror_view.license.txt
+++ b/core/src/3rd-party-licenses/codemirror_view.license.txt
@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (C) 2018-2021 by Marijn Haverbeke <marijn@haverbeke.berlin> and others
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
--- a/core/src/3rd-party-licenses/toml.license.txt
+++ b/core/src/3rd-party-licenses/toml.license.txt
@@ -0,0 +1,21 @@
+The MIT License (MIT)
+
+Copyright (c) 2015 Jak Wings
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
--- a/core/src/3rd-party-licenses/xterm-readline.license.txt
+++ b/core/src/3rd-party-licenses/xterm-readline.license.txt
@@ -0,0 +1,25 @@
+Copyright 2021 Erik Bremen
+
+Permission is hereby granted, free of charge, to any
+person obtaining a copy of this software and associated
+documentation files (the "Software"), to deal in the
+Software without restriction, including without
+limitation the rights to use, copy, modify, merge,
+publish, distribute, sublicense, and/or sell copies of
+the Software, and to permit persons to whom the Software
+is furnished to do so, subject to the following
+conditions:
+
+The above copyright notice and this permission notice
+shall be included in all copies or substantial portions
+of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF
+ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED
+TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
+PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT
+SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR
+IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+DEALINGS IN THE SOFTWARE.
--- a/core/src/3rd-party-licenses/xterm.license.txt
+++ b/core/src/3rd-party-licenses/xterm.license.txt
@@ -0,0 +1,21 @@
+Copyright (c) 2017-2019, The xterm.js authors (https://github.com/xtermjs/xterm.js)
+Copyright (c) 2014-2016, SourceLair Private Company (https://www.sourcelair.com)
+Copyright (c) 2012-2013, Christopher Jeffrey (https://github.com/chjj/)
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
--- a/core/src/3rd-party-licenses/xterm_addon-fit.license.txt
+++ b/core/src/3rd-party-licenses/xterm_addon-fit.license.txt
@@ -0,0 +1,19 @@
+Copyright (c) 2019, The xterm.js authors (https://github.com/xtermjs/xterm.js)
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
--- a/core/src/3rd-party-licenses/xterm_addon-web-links.lixense.txt
+++ b/core/src/3rd-party-licenses/xterm_addon-web-links.lixense.txt
@@ -0,0 +1,19 @@
+Copyright (c) 2017, The xterm.js authors (https://github.com/xtermjs/xterm.js)
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
--- a/core/src/3rd-party/README.md
+++ b/core/src/3rd-party/README.md
@@ -5,3 +5,7 @@ This folder contains artifacts created via [3rd-party.cjs](../../rollup/3rd-part
 As we would like to offer a way to run PyScript offline, and we already offer a `dist` folder with all the necessary scripts, we have created a foreign dependencies resolver that allow to lazy-load CDN dependencies out of the box.

 Please **note** these dependencies are **not interpreters**, because interpreters have their own mechanism, folders structure, WASM files, and whatnot, to work locally, but at least XTerm or the TOML parser, among other lazy dependencies, should be available within the dist folder.
+
+## Licenses
+
+All licenses provided by 3rd-party authors can be found in [3rd-party-licenses](../3rd-party-licenses/) folder.
--- a/core/src/3rd-party/xterm-readline.js
+++ b/core/src/3rd-party/xterm-readline.js
@@ -1,5 +1,5 @@
 /**
- * Bundled by jsDelivr using Rollup v2.79.1 and Terser v5.19.2.
+ * Bundled by jsDelivr using Rollup v2.79.2 and Terser v5.39.0.
 * Original file: /npm/xterm-readline@1.1.2/lib/readline.js
 *
 * Do NOT use SRI with dynamically generated files! More information: https://www.jsdelivr.com/using-sri-with-dynamic-files
--- a/core/src/3rd-party/xterm.css
+++ b/core/src/3rd-party/xterm.css
@@ -1,5 +1,5 @@
 /**
- * Minified by jsDelivr using clean-css v5.3.2.
+ * Minified by jsDelivr using clean-css v5.3.3.
 * Original file: /npm/@xterm/xterm@5.5.0/css/xterm.css
 *
 * Do NOT use SRI with dynamically generated files! More information: https://www.jsdelivr.com/using-sri-with-dynamic-files
--- a/core/src/3rd-party/xterm.js
+++ b/core/src/3rd-party/xterm.js
--- a/core/src/3rd-party/xterm_addon-fit.js
+++ b/core/src/3rd-party/xterm_addon-fit.js
@@ -1,5 +1,5 @@
 /**
- * Bundled by jsDelivr using Rollup v2.79.2 and Terser v5.37.0.
+ * Bundled by jsDelivr using Rollup v2.79.2 and Terser v5.39.0.
 * Original file: /npm/@xterm/addon-fit@0.10.0/lib/addon-fit.js
 *
 * Do NOT use SRI with dynamically generated files! More information: https://www.jsdelivr.com/using-sri-with-dynamic-files
--- a/core/src/3rd-party/xterm_addon-web-links.js
+++ b/core/src/3rd-party/xterm_addon-web-links.js
@@ -1,5 +1,5 @@
 /**
- * Bundled by jsDelivr using Rollup v2.79.2 and Terser v5.37.0.
+ * Bundled by jsDelivr using Rollup v2.79.2 and Terser v5.39.0.
 * Original file: /npm/@xterm/addon-web-links@0.11.0/lib/addon-web-links.js
 *
 * Do NOT use SRI with dynamically generated files! More information: https://www.jsdelivr.com/using-sri-with-dynamic-files
--- a/core/src/all-done.js
+++ b/core/src/all-done.js
@@ -1,3 +1,4 @@
+import withResolvers from "@webreflection/utils/with-resolvers";
 import TYPES from "./types.js";

 const waitForIt = [];
@@ -5,7 +6,7 @@ const waitForIt = [];
 for (const [TYPE] of TYPES) {
    const selectors = [`script[type="${TYPE}"]`, `${TYPE}-script`];
    for (const element of document.querySelectorAll(selectors.join(","))) {
-        const { promise, resolve } = Promise.withResolvers();
+        const { promise, resolve } = withResolvers();
        waitForIt.push(promise);
        element.addEventListener(`${TYPE}:done`, resolve, { once: true });
    }
--- a/core/src/config.js
+++ b/core/src/config.js
@@ -154,6 +154,9 @@ for (const [TYPE] of TYPES) {
        return await Promise.all(toBeAwaited);
    };

+    if (Number.isSafeInteger(parsed?.experimental_ffi_timeout))
+        globalThis.reflected_ffi_timeout = parsed?.experimental_ffi_timeout;
+
    configs.set(TYPE, { config: parsed, configURL, plugins, error });
 }

--- a/core/src/core.js
+++ b/core/src/core.js
@@ -1,7 +1,8 @@
 /*! (c) PyScript Development Team */

+import "./zero-redirect.js";
 import stickyModule from "sticky-module";
-import "@ungap/with-resolvers";
+import withResolvers from "@webreflection/utils/with-resolvers";

 import {
    INVALID_CONTENT,
@@ -327,7 +328,7 @@ for (const [TYPE, interpreter] of TYPES) {
                class extends HTMLElement {
                    constructor() {
                        assign(super(), {
-                            _wrap: Promise.withResolvers(),
+                            _wrap: withResolvers(),
                            srcCode: "",
                            executed: false,
                        });
--- a/core/src/fs.js
+++ b/core/src/fs.js
@@ -1,4 +1,5 @@
 import IDBMap from "@webreflection/idb-map";
+import withResolvers from "@webreflection/utils/with-resolvers";
 import { assign } from "polyscript/exports";
 import { $$ } from "basic-devtools";

@@ -26,7 +27,7 @@ export const getFileSystemDirectoryHandle = async (options) => {
        );
    }

-    const { promise, resolve, reject } = Promise.withResolvers();
+    const { promise, resolve, reject } = withResolvers();

    const how = { id: "pyscript", mode: "readwrite", ...options };
    if (options.hint) how.startIn = options.hint;
--- a/core/src/plugins/py-editor.js
+++ b/core/src/plugins/py-editor.js
@@ -1,4 +1,5 @@
 // PyScript py-editor plugin
+import withResolvers from "@webreflection/utils/with-resolvers";
 import { Hook, XWorker, dedent, defineProperties } from "polyscript/exports";
 import { TYPES, offline_interpreter, relative_url, stdlib } from "../core.js";
 import { notify } from "./error.js";
@@ -37,7 +38,7 @@ const getRelatedScript = (target, type) => {
    return editor?.parentNode?.previousElementSibling;
 };

-async function execute({ currentTarget }) {
+async function execute({ currentTarget, script }) {
    const { env, pySrc, outDiv } = this;
    const hasRunButton = !!currentTarget;

@@ -90,16 +91,15 @@ async function execute({ currentTarget }) {
        // creation and destruction of editors on the fly
        if (hasRunButton) {
            for (const type of TYPES.keys()) {
-                const script = getRelatedScript(currentTarget, type);
-                if (script) {
-                    defineProperties(script, { xworker: { value: xworker } });
-                    break;
-                }
+                script = getRelatedScript(currentTarget, type);
+                if (script) break;
            }
        }

+        defineProperties(script, { xworker: { value: xworker } });
+
        const { sync } = xworker;
-        const { promise, resolve } = Promise.withResolvers();
+        const { promise, resolve } = withResolvers();
        envs.set(env, promise);
        sync.revoke = () => {
            URL.revokeObjectURL(srcLink);
@@ -126,6 +126,14 @@ async function execute({ currentTarget }) {
            if (hasRunButton) {
                currentTarget.classList.remove("running");
                currentTarget.innerHTML = RUN_BUTTON;
+                const { previousElementSibling } =
+                    currentTarget.closest("[data-env]").parentElement;
+                previousElementSibling?.dispatchEvent(
+                    new Event("py-editor:done", {
+                        bubbles: true,
+                        cancelable: true,
+                    }),
+                );
            }
        };
        const { sync } = xworker;
@@ -148,6 +156,20 @@ async function execute({ currentTarget }) {
    });
 }

+const replaceScript = (script, type) => {
+    script.xworker?.terminate();
+    const clone = script.cloneNode(true);
+    clone.type = `${type}-editor`;
+    const editor = editors.get(script);
+    if (editor) {
+        const content = editor.state.doc.toString();
+        clone.textContent = content;
+        editors.delete(script);
+        script.nextElementSibling.remove();
+    }
+    script.replaceWith(clone);
+};
+
 const makeRunButton = (handler, type) => {
    const runButton = document.createElement("button");
    runButton.className = `absolute ${type}-editor-run-button`;
@@ -160,15 +182,25 @@ const makeRunButton = (handler, type) => {
        ) {
            const script = getRelatedScript(runButton, type);
            if (script) {
-                const editor = editors.get(script);
-                const content = editor.state.doc.toString();
-                const clone = script.cloneNode(true);
-                clone.type = `${type}-editor`;
-                clone.textContent = content;
-                script.xworker.terminate();
-                script.nextElementSibling.remove();
-                script.replaceWith(clone);
-                editors.delete(script);
+                const env = script.getAttribute("env");
+                // remove the bootstrapped env which could be one or shared
+                if (env) {
+                    for (const [key, value] of TYPES) {
+                        if (key === type) {
+                            configs.delete(`${value}-${env}`);
+                            envs.delete(`${value}-${env}`);
+                            break;
+                        }
+                    }
+                }
+                // lonley script without setup node should be replaced
+                if (script.xworker) replaceScript(script, type);
+                // all scripts sharing the same env should be replaced
+                else {
+                    const sel = `script[type^="${type}-editor"][env="${env}"]`;
+                    for (const script of document.querySelectorAll(sel))
+                        replaceScript(script, type);
+                }
            }
            return;
        }
@@ -356,7 +388,7 @@ const init = async (script, type, interpreter) => {
    };

    if (isSetup) {
-        await context.handleEvent({ currentTarget: null });
+        await context.handleEvent({ currentTarget: null, script });
        notifyEditor();
        return;
    }
--- a/core/src/plugins/py-terminal/mpy.js
+++ b/core/src/plugins/py-terminal/mpy.js
@@ -1,4 +1,5 @@
 // PyScript pyodide terminal plugin
+import withResolvers from "@webreflection/utils/with-resolvers";
 import { defineProperties } from "polyscript/exports";
 import { hooks, inputFailure } from "../../core.js";

@@ -146,7 +147,7 @@ export default async (element) => {
            // frees the worker on \r
            sync.pyterminal_read = (buffer) => {
                terminal.write(buffer);
-                promisedChunks = Promise.withResolvers();
+                promisedChunks = withResolvers();
                return promisedChunks.promise;
            };

--- a/core/src/service-worker.js
+++ b/core/src/service-worker.js
@@ -0,0 +1 @@
+import "polyscript/service-worker";
--- a/core/src/stdlib/pyscript.js
+++ b/core/src/stdlib/pyscript.js
--- a/core/src/stdlib/pyscript/display.py
+++ b/core/src/stdlib/pyscript/display.py
@@ -4,6 +4,7 @@ import io
 import re

 from pyscript.magic_js import current_target, document, window
+from pyscript.ffi import is_none

 _MIME_METHODS = {
    "savefig": "image/png",
@@ -105,13 +106,13 @@ def _format_mime(obj):
        else:
            output = _eval_formatter(obj, method)

-        if output is None:
+        if is_none(output):
            continue
        if mime_type not in _MIME_RENDERERS:
            not_available.append(mime_type)
            continue
        break
-    if output is None:
+    if is_none(output):
        if not_available:
            window.console.warn(
                f"Rendered object requested unavailable MIME renderers: {not_available}"
@@ -135,7 +136,7 @@ def _write(element, value, append=False):
        element.append(out_element)
    else:
        out_element = element.lastElementChild
-        if out_element is None:
+        if is_none(out_element):
            out_element = element

    if mime_type in ("application/javascript", "text/html"):
@@ -146,7 +147,7 @@ def _write(element, value, append=False):


 def display(*values, target=None, append=True):
-    if target is None:
+    if is_none(target):
        target = current_target()
    elif not isinstance(target, str):
        msg = f"target must be str or None, not {target.__class__.__name__}"
@@ -162,7 +163,7 @@ def display(*values, target=None, append=True):
    element = document.getElementById(target)

    # If target cannot be found on the page, a ValueError is raised
-    if element is None:
+    if is_none(element):
        msg = f"Invalid selector with id={target}. Cannot be found in the page."
        raise ValueError(msg)

--- a/core/src/stdlib/pyscript/ffi.py
+++ b/core/src/stdlib/pyscript/ffi.py
@@ -2,8 +2,10 @@ try:
    import js
    from pyodide.ffi import create_proxy as _cp
    from pyodide.ffi import to_js as _py_tjs
+    from pyodide.ffi import jsnull

    from_entries = js.Object.fromEntries
+    is_none = lambda value: value is None or value is jsnull

    def _tjs(value, **kw):
        if not hasattr(kw, "dict_converter"):
@@ -13,6 +15,34 @@ try:
 except:
    from jsffi import create_proxy as _cp
    from jsffi import to_js as _tjs
+    import js
+
+    jsnull = js.Object.getPrototypeOf(js.Object.prototype)
+    is_none = lambda value: value is None or value is jsnull

 create_proxy = _cp
 to_js = _tjs
+
+try:
+    from polyscript import ffi as _ffi
+
+    direct = _ffi.direct
+    gather = _ffi.gather
+    query = _ffi.query
+
+    def assign(source, *args):
+        for arg in args:
+            _ffi.assign(source, to_js(arg))
+        return source
+
+except:
+    import js
+
+    _assign = js.Object.assign
+
+    direct = lambda source: source
+
+    def assign(source, *args):
+        for arg in args:
+            _assign(source, to_js(arg))
+        return source
--- a/core/src/stdlib/pyscript/fs.py
+++ b/core/src/stdlib/pyscript/fs.py
@@ -49,6 +49,28 @@ async def mount(path, mode="readwrite", root="", id="pyscript"):
    mounted[path] = await interpreter.mountNativeFS(path, handler)


+async def revoke(path, id="pyscript"):
+    from _pyscript import fs, interpreter
+    from pyscript.magic_js import (
+        RUNNING_IN_WORKER,
+        sync,
+    )
+
+    uid = f"{path}@{id}"
+
+    if RUNNING_IN_WORKER:
+        had = sync.deleteFSHandler(uid)
+    else:
+        had = await fs.idb.has(uid)
+        if had:
+            had = await fs.idb.delete(uid)
+
+    if had:
+        interpreter._module.FS.unmount(path)
+
+    return had
+
+
 async def sync(path):
    await mounted[path].syncfs()

--- a/core/src/stdlib/pyscript/magic_js.py
+++ b/core/src/stdlib/pyscript/magic_js.py
@@ -67,7 +67,11 @@ if RUNNING_IN_WORKER:

 else:
    import _pyscript
-    from _pyscript import PyWorker, js_import
+    from _pyscript import PyWorker as _PyWorker, js_import
+    from pyscript.ffi import to_js
+
+    def PyWorker(url, **kw):
+        return _PyWorker(url, to_js(kw))

    window = globalThis
    document = globalThis.document
--- a/core/src/stdlib/pyscript/storage.py
+++ b/core/src/stdlib/pyscript/storage.py
@@ -1,11 +1,12 @@
 from polyscript import storage as _storage
 from pyscript.flatted import parse as _parse
 from pyscript.flatted import stringify as _stringify
+from pyscript.ffi import is_none


 # convert a Python value into an IndexedDB compatible entry
 def _to_idb(value):
-    if value is None:
+    if is_none(value):
        return _stringify(["null", 0])
    if isinstance(value, (bool, float, int, str, list, dict, tuple)):
        return _stringify(["generic", value])
--- a/core/src/stdlib/pyscript/web.py
+++ b/core/src/stdlib/pyscript/web.py
@@ -6,7 +6,7 @@
 # from __future__ import annotations  # CAUTION: This is not supported in MicroPython.

 from pyscript import document, when, Event  # noqa: F401
-from pyscript.ffi import create_proxy
+from pyscript.ffi import create_proxy, is_none


 def wrap_dom_element(dom_element):
@@ -68,8 +68,10 @@ class Element:
        If `dom_element` is None we are being called to *create* a new element.
        Otherwise, we are being called to *wrap* an existing DOM element.
        """
-        self._dom_element = dom_element or document.createElement(
-            type(self).get_tag_name()
+        self._dom_element = (
+            document.createElement(type(self).get_tag_name())
+            if is_none(dom_element)
+            else dom_element
        )

        # HTML on_events attached to the element become pyscript.Event instances.
@@ -124,6 +126,11 @@ class Element:
        # Element instance via `for_`).
        if name.endswith("_"):
            name = name[:-1]  # noqa: FURB188 No str.removesuffix() in MicroPython.
+        if name == "for":
+            # The `for` attribute is a special case as it is a keyword in both
+            # Python and JavaScript.
+            # We need to get it from the underlying DOM element as `htmlFor`.
+            name = "htmlFor"
        return getattr(self._dom_element, name)

    def __setattr__(self, name, value):
@@ -142,6 +149,11 @@ class Element:
            # Element instance via `for_`).
            if name.endswith("_"):
                name = name[:-1]  # noqa: FURB188 No str.removesuffix() in MicroPython.
+            if name == "for":
+                # The `for` attribute is a special case as it is a keyword in both
+                # Python and JavaScript.
+                # We need to set it on the underlying DOM element as `htmlFor`.
+                name = "htmlFor"

            if name.startswith("on_"):
                # Ensure on-events are cached in the _on_events dict if the
@@ -185,7 +197,7 @@ class Element:
    @property
    def parent(self):
        """Return the element's `parent `Element`."""
-        if self._dom_element.parentElement is None:
+        if is_none(self._dom_element.parentElement):
            return None

        return Element.wrap_dom_element(self._dom_element.parentElement)
@@ -1124,7 +1136,7 @@ class video(ContainerElement):
        width = width if width is not None else self.videoWidth
        height = height if height is not None else self.videoHeight

-        if to is None:
+        if is_none(to):
            to = canvas(width=width, height=height)

        elif isinstance(to, Element):
--- a/core/src/stdlib/pyscript/websocket.py
+++ b/core/src/stdlib/pyscript/websocket.py
@@ -1,6 +1,6 @@
 import js
 from pyscript.ffi import create_proxy
-from pyscript.util import as_bytearray
+from pyscript.util import as_bytearray, is_awaitable

 code = "code"
 protocols = "protocols"
@@ -8,6 +8,23 @@ reason = "reason"
 methods = ["onclose", "onerror", "onmessage", "onopen"]


+def add_listener(socket, onevent, listener):
+    p = create_proxy(listener)
+
+    if is_awaitable(listener):
+
+        async def wrapper(e):
+            await p(EventMessage(e))
+
+        m = wrapper
+
+    else:
+        m = lambda e: p(EventMessage(e))
+
+    # Pyodide fails at setting socket[onevent] directly
+    setattr(socket, onevent, m)
+
+
 class EventMessage:
    def __init__(self, event):
        self._event = event
@@ -36,20 +53,20 @@ class WebSocket:
            socket = js.WebSocket.new(url, kw[protocols])
        else:
            socket = js.WebSocket.new(url)
+
+        socket.binaryType = "arraybuffer"
        object.__setattr__(self, "_ws", socket)

        for t in methods:
            if t in kw:
-                # Pyodide fails at setting socket[t] directly
-                setattr(socket, t, create_proxy(kw[t]))
+                add_listener(socket, t, kw[t])

    def __getattr__(self, attr):
        return getattr(self._ws, attr)

    def __setattr__(self, attr, value):
        if attr in methods:
-            m = lambda e: value(EventMessage(e))
-            setattr(self._ws, attr, create_proxy(m))
+            add_listener(self._ws, attr, value)
        else:
            setattr(self._ws, attr, value)

--- a/core/src/storage.js
+++ b/core/src/storage.js
@@ -1,14 +1,14 @@
-import { ArrayBuffer, TypedArray } from "sabayon/shared";
 import IDBMapSync from "@webreflection/idb-map/sync";
 import { parse, stringify } from "flatted";

+const { isView } = ArrayBuffer;
+
 const to_idb = (value) => {
    if (value == null) return stringify(["null", 0]);
    /* eslint-disable no-fallthrough */
    switch (typeof value) {
        case "object": {
-            if (value instanceof TypedArray)
-                return stringify(["memoryview", [...value]]);
+            if (isView(value)) return stringify(["memoryview", [...value]]);
            if (value instanceof ArrayBuffer)
                return stringify(["bytearray", [...new Uint8Array(value)]]);
        }
--- a/core/src/sync.js
+++ b/core/src/sync.js
@@ -16,7 +16,7 @@ export default {
     * Ask a user action via dialog and returns the directory handler once granted.
     * @param {string} uid
     * @param {{id?:string, mode?:"read"|"readwrite", hint?:"desktop"|"documents"|"downloads"|"music"|"pictures"|"videos"}} options
-     * @returns {boolean}
+     * @returns {Promise<boolean>}
     */
    async storeFSHandler(uid, options = {}) {
        if (await idb.has(uid)) return true;
@@ -28,4 +28,15 @@ export default {
            () => false,
        );
    },
+
+    /**
+     * Explicitly remove the unique identifier for the FS handler.
+     * @param {string} uid
+     * @returns {Promise<boolean>}
+     */
+    async deleteFSHandler(uid) {
+        const had = await idb.has(uid);
+        if (had) await idb.delete(uid);
+        return had;
+    },
 };
--- a/core/src/zero-redirect.js
+++ b/core/src/zero-redirect.js
@@ -0,0 +1,7 @@
+/* eslint no-unused-vars: 0 */
+try {
+    crypto.randomUUID();
+} catch (_) {
+    if (location.href.startsWith("http://0.0.0.0"))
+        location.href = location.href.replace("0.0.0.0", "localhost");
+}
--- a/core/tests/index.html
+++ b/core/tests/index.html
--- a/core/tests/javascript/worker-symbols.html
+++ b/core/tests/javascript/worker-symbols.html
@@ -0,0 +1,36 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+  <meta charset="UTF-8">
+  <meta name="viewport" content="width=device-width, initial-scale=1.0">
+  <title>PyScript VS Symbols</title>
+  <script>
+    globalThis.hasSymbol = (symbol, ref) => symbol in ref;
+    globalThis.getSymbol = (symbol, ref) => ref[symbol];
+
+    // some 3rd party JS library might use symbols to brand-check
+    // so it's not about symbols traveling from MicroPython
+    // it's about MicroPython proxies traps not understanding symbols
+    globalThis.hasIterator = ref => Symbol.iterator in ref;
+  </script>
+  <link rel="stylesheet" href="../../dist/core.css">
+  <script type="module" src="../../dist/core.js"></script>
+  <script type="mpy">
+    import js
+
+    symbol = js.Symbol.iterator
+
+    if js.getSymbol(symbol, []) and js.hasSymbol(symbol, []) and js.hasIterator([]):
+      js.document.documentElement.classList.add("main")
+  </script>
+  <script type="mpy" worker>
+    from pyscript import window
+    import js
+
+    symbol = js.Symbol.iterator
+
+    if window.getSymbol(symbol, []) and window.hasSymbol(symbol, []) and window.hasIterator([]):
+      window.document.documentElement.classList.add("worker")
+  </script>
+</head>
+</html>
--- a/core/tests/javascript/ws/index.html
+++ b/core/tests/javascript/ws/index.html
@@ -14,7 +14,7 @@
        print(event.type)
        ws.send("hello")

-    def onmessage(event):
+    async def onmessage(event):
        print(event.type, event.data)
        ws.close()

--- a/core/tests/js_tests.spec.js
+++ b/core/tests/js_tests.spec.js
@@ -59,6 +59,11 @@ test('MicroPython + configURL', async ({ page }) => {
  await page.waitForSelector('html.main.worker');
 });

+test('MicroPython + Symbols', async ({ page }) => {
+  await page.goto('http://localhost:8080/tests/javascript/worker-symbols.html');
+  await page.waitForSelector('html.main.worker');
+});
+
 test('Pyodide + terminal on Main', async ({ page }) => {
  await page.goto('http://localhost:8080/tests/javascript/py-terminal-main.html');
  await page.waitForSelector('html.ok');
--- a/core/tests/manual/ffi_timeout/index.html
+++ b/core/tests/manual/ffi_timeout/index.html
@@ -0,0 +1,21 @@
+<!DOCTYPE html>
+<html>
+  <head>
+      <meta charset="utf-8">
+      <meta name="viewport" content="width=device-width,initial-scale=1">
+      <link rel="stylesheet" href="../../../dist/core.css">
+      <script>
+        window.Worker = class extends Worker {
+          constructor(url, ...rest) {
+            console.log(rest[0]);
+            return super(url, ...rest);
+          }
+        };
+        window.start = Date.now();
+      </script>
+      <script type="module" src="../../../dist/core.js"></script>
+  </head>
+  <body>
+    <script type="py" config="./index.toml" src="index.py" worker></script>
+  </body>
+</html>
--- a/core/tests/manual/ffi_timeout/index.py
+++ b/core/tests/manual/ffi_timeout/index.py
@@ -0,0 +1,3 @@
+from pyscript import document, window
+
+document.body.append(window.Date.now() - window.start)
--- a/core/tests/manual/ffi_timeout/index.toml
+++ b/core/tests/manual/ffi_timeout/index.toml
@@ -0,0 +1,2 @@
+experimental_ffi_timeout = 0
+package_cache = "passthrough"
--- a/core/tests/manual/fs/index.py
+++ b/core/tests/manual/fs/index.py
@@ -19,6 +19,8 @@ if TEST == "implicit":

    await fs.sync("/persistent")

+    # await fs.revoke("/persistent")
+
 elif not RUNNING_IN_WORKER:
    from pyscript import document

@@ -39,7 +41,7 @@ elif not RUNNING_IN_WORKER:
            js.alert("unable to grant access")

    async def unmount(event):
-        await fs.unmount("/persistent")
+        await fs.revoke("/persistent")
        button.textContent = "mount"
        button.onclick = mount

--- a/core/tests/python/settings_py.json
+++ b/core/tests/python/settings_py.json
@@ -24,5 +24,6 @@
            "./example_js_worker_module.js": "greeting_worker"
        }
    },
-    "packages": ["Pillow" ]
+    "packages": ["Pillow" ],
+    "experimental_ffi_timeout": 0
 }
--- a/core/tests/python/tests/test_web.py
+++ b/core/tests/python/tests/test_web.py
@@ -871,7 +871,17 @@ class TestElements:
        self._create_el_and_basic_asserts("kbd", "some text")

    def test_label(self):
-        self._create_el_and_basic_asserts("label", "some text")
+        label_text = "Luke, I am your father"
+        label_for = "some-id"
+        # Let's create the element
+        el = web.label(label_text, for_=label_for)
+        # Let's check the element was configured correctly.
+        assert isinstance(el, web.label), "The new element should be a label."
+        assert el.textContent == label_text, "The label text should match."
+        assert el._dom_element.tagName == "LABEL"
+        assert el.for_ == label_for, "The label should have the correct for attribute."
+        # Ensure the label element is rendered with the correct "for" attribute
+        assert f'for="{label_for}"' in el.outerHTML, "The label should have the correct 'for' attribute in its HTML."

    def test_legend(self):
        self._create_el_and_basic_asserts("legend", "some text")
--- a/core/types/core.d.ts
+++ b/core/types/core.d.ts
@@ -63,5 +63,5 @@ declare const exportedHooks: {
    };
 };
 declare const exportedConfig: {};
-declare const exportedWhenDefined: any;
+declare const exportedWhenDefined: (type: string) => Promise<object>;
 export { codemirror, stdlib, optional, inputFailure, TYPES, relative_url, exportedPyWorker as PyWorker, exportedMPWorker as MPWorker, exportedHooks as hooks, exportedConfig as config, exportedWhenDefined as whenDefined };
--- a/core/types/sync.d.ts
+++ b/core/types/sync.d.ts
@@ -9,12 +9,18 @@ declare namespace _default {
     * Ask a user action via dialog and returns the directory handler once granted.
     * @param {string} uid
     * @param {{id?:string, mode?:"read"|"readwrite", hint?:"desktop"|"documents"|"downloads"|"music"|"pictures"|"videos"}} options
-     * @returns {boolean}
+     * @returns {Promise<boolean>}
     */
    function storeFSHandler(uid: string, options?: {
        id?: string;
        mode?: "read" | "readwrite";
        hint?: "desktop" | "documents" | "downloads" | "music" | "pictures" | "videos";
-    }): boolean;
+    }): Promise<boolean>;
+    /**
+     * Explicitly remove the unique identifier for the FS handler.
+     * @param {string} uid
+     * @returns {Promise<boolean>}
+     */
+    function deleteFSHandler(uid: string): Promise<boolean>;
 }
 export default _default;
--- a/core/types/zero-redirect.d.ts
+++ b/core/types/zero-redirect.d.ts
@@ -0,0 +1 @@
+export {};
--- a/public/index.html
+++ b/public/index.html
@@ -137,12 +137,14 @@
    &lt;body&gt;
        &lt;h1&gt;Hello world!&lt;/h1&gt;
        &lt;p&gt;These are the Python interpreters in PyScript _VERSION_:&lt;/p&gt;
-        &lt;script type=&quot;py&quot;&gt;  &lt;!-- Pyodide --&gt;
+        &lt;script type=&quot;py&quot;&gt;
+            # Pyodide
            from pyscript import display
            import sys
            display(sys.version)
        &lt;/script&gt;
-        &lt;script type=&quot;mpy&quot;&gt;  &lt;!-- MicroPython --&gt;
+        &lt;script type=&quot;mpy&quot;&gt;
+            # MicroPython
            from pyscript import display
            import sys
            display(sys.version)
Author	SHA1	Message	Date
Andrea Giammarchi	67fa31e4ea	Bumped version to 2025.8.1 (#2369 )	2025-08-07 09:59:11 +02:00
Andrea Giammarchi	4937a46731	Updated Polyscript to its latest (#2364 ) * Fix #2360 - Better shared env/setup handling (#2361) * Updated Polyscript to its latest * [pre-commit.ci] auto fixes from pre-commit.com hooks for more information, see https://pre-commit.ci * changed is_null to a more Pythonic is_none --------- Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>	2025-08-06 19:23:24 +02:00
Andrea Giammarchi	b4e9a3093c	Fix #2338 - Added explicit fs.revoke(path) (#2368 )	2025-08-06 14:40:52 +02:00
Andrea Giammarchi	a129be8136	WebSocket and PyWorker fixes (#2366 ) * WebSocket and PyWorker fixes * [pre-commit.ci] auto fixes from pre-commit.com hooks for more information, see https://pre-commit.ci --------- Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>	2025-07-24 15:03:51 +02:00
Andrea Giammarchi	eaa6711756	Fix #2360 - Better shared env/setup handling (#2361 )	2025-07-11 10:56:14 +02:00
Andrea Giammarchi	b528ba67a9	Intermediate release with async worker handler fixes (#2359 )	2025-07-10 15:21:50 +02:00
Andrea Giammarchi	71ad1a40cb	Update Polyscript with latest Micropython (#2357 )	2025-07-04 09:34:12 +02:00
Andrea Giammarchi	e433275938	Readme update (#2356 ) * Updated the README with latest PyScript version * [pre-commit.ci] auto fixes from pre-commit.com hooks for more information, see https://pre-commit.ci --------- Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>	2025-07-01 14:01:51 +02:00
Andrea Giammarchi	87256a662b	Updated Polyscript to its latest (#2355 ) * Updated Polyscript to its latest * added tests for `experimental_ffi_timeout`	2025-07-01 13:07:28 +02:00
Andrea Giammarchi	7336ae545e	The PyScript Bridge Helper (#2353 ) * The PyScript Bridge Helper * added importmap to test latest versions with ease	2025-06-26 12:41:29 +02:00
Nicholas Tollervey	d68260c0c7	Fix a bug in `<label>` handling where 'for_' attribute should be 'htmlFor' on underlying HTML element. (#2352 ) * Fix bug in label handling where 'for_' attribute should be 'htmlFor' on underlying HTML element. * Fix comment.	2025-06-18 15:01:33 +01:00
Nicholas Tollervey	14cc05fb80	Fix code example problem in the release HTML. (#2345 )	2025-05-21 16:27:27 +01:00
Andrea Giammarchi	42c6cb775e	Added all 3rd party licenses to this project (#2343 )	2025-05-21 14:30:55 +01:00
Andrea Giammarchi	b11fb2e893	Added polyscript/service-worker as workaround for missing sabayon (#2334 ) * Added polyscript/service-worker as workaround for missing sabayon * [pre-commit.ci] auto fixes from pre-commit.com hooks for more information, see https://pre-commit.ci * updated polyscript to its latest * Updated polyscript one mor time --------- Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>	2025-05-15 18:20:38 +02:00
pre-commit-ci[bot]	3223a9c7e9	[pre-commit.ci] pre-commit autoupdate (#2336 ) updates: - [github.com/astral-sh/ruff-pre-commit: v0.11.4 → v0.11.8](https://github.com/astral-sh/ruff-pre-commit/compare/v0.11.4...v0.11.8) Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>	2025-05-06 09:22:05 -04:00
Andrea Giammarchi	139ce9b5fb	Updated Polyscript & Coincident to their latest (#2327 )	2025-04-23 17:56:06 +02:00
pre-commit-ci[bot]	3b1af0688c	[pre-commit.ci] pre-commit autoupdate (#2307 ) updates: - [github.com/astral-sh/ruff-pre-commit: v0.9.6 → v0.11.4](https://github.com/astral-sh/ruff-pre-commit/compare/v0.9.6...v0.11.4) Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com> Co-authored-by: Dan Yeaw <dan@yeaw.me>	2025-04-18 12:02:24 -04:00
Andrea Giammarchi	7284f7f15f	Fix #2320 - Dispatch an event on code run in PyEditor (#2329 ) * Fix #2320 - Dispatch an event on code run in PyEditor	2025-04-16 22:01:40 +02:00
Andrea Giammarchi	16ebc50481	Fix #2326 - Redirect to localhost when on 0.0.0.0 (#2328 ) * Fix #2326 - Redirect to localhost when on 0.0.0.0	2025-04-14 15:55:10 +02:00