From 4937a46731ab119a488115e9139816ba540e8df5 Mon Sep 17 00:00:00 2001
From: Andrea Giammarchi <andrea.giammarchi@gmail.com>
Date: Wed, 6 Aug 2025 19:23:24 +0200
Subject: [PATCH] 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>
---
 core/package-lock.json              | 407 ++++++++++++++--------------
 core/package.json                   |  18 +-
 core/src/stdlib/pyscript.js         |   8 +-
 core/src/stdlib/pyscript/display.py |  11 +-
 core/src/stdlib/pyscript/ffi.py     |   6 +
 core/src/stdlib/pyscript/storage.py |   3 +-
 core/src/stdlib/pyscript/web.py     |  12 +-
 core/types/core.d.ts                |   2 +-
 8 files changed, 232 insertions(+), 235 deletions(-)

diff --git a/core/package-lock.json b/core/package-lock.json
index e8ee933b..9d1797c1 100644
--- a/core/package-lock.json
+++ b/core/package-lock.json
@@ -1,12 +1,12 @@
 {
     "name": "@pyscript/core",
-    "version": "0.6.65",
+    "version": "0.6.70",
     "lockfileVersion": 3,
     "requires": true,
     "packages": {
         "": {
             "name": "@pyscript/core",
-            "version": "0.6.65",
+            "version": "0.6.70",
             "license": "APACHE-2.0",
             "dependencies": {
                 "@ungap/with-resolvers": "^0.1.0",
@@ -14,7 +14,7 @@
                 "@webreflection/utils": "^0.1.1",
                 "add-promise-listener": "^0.1.3",
                 "basic-devtools": "^0.1.6",
-                "polyscript": "^0.18.3",
+                "polyscript": "^0.18.9",
                 "sticky-module": "^0.1.1",
                 "to-json-callback": "^0.1.1",
                 "type-checked-collections": "^0.1.7"
@@ -24,8 +24,8 @@
                 "@codemirror/lang-python": "^6.2.1",
                 "@codemirror/language": "^6.11.2",
                 "@codemirror/state": "^6.5.2",
-                "@codemirror/view": "^6.38.0",
-                "@playwright/test": "^1.54.0",
+                "@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",
@@ -33,18 +33,18 @@
                 "@xterm/addon-fit": "^0.10.0",
                 "@xterm/addon-web-links": "^0.11.0",
                 "@xterm/xterm": "^5.5.0",
-                "bun": "^1.2.18",
+                "bun": "^1.2.19",
                 "chokidar": "^4.0.3",
                 "codedent": "^0.1.2",
                 "codemirror": "^6.0.2",
-                "eslint": "^9.30.1",
+                "eslint": "^9.32.0",
                 "flatted": "^3.3.3",
-                "rollup": "^4.44.2",
+                "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": "^5.8.3",
+                "typescript": "^5.9.2",
                 "xterm-readline": "^1.1.2"
             },
             "engines": {
@@ -141,9 +141,9 @@
             }
         },
         "node_modules/@codemirror/view": {
-            "version": "6.38.0",
-            "resolved": "https://registry.npmjs.org/@codemirror/view/-/view-6.38.0.tgz",
-            "integrity": "sha512-yvSchUwHOdupXkd7xJ0ob36jdsSR/I+/C+VbY0ffBiL5NiSTEBDfB1ZGWbbIlDd5xgdUkody+lukAdOxYrOBeg==",
+            "version": "6.38.1",
+            "resolved": "https://registry.npmjs.org/@codemirror/view/-/view-6.38.1.tgz",
+            "integrity": "sha512-RmTOkE7hRU3OVREqFVITWHz6ocgBjv08GoePscAakgVQfciA3SGCEk7mb9IzwW61cKKmlTpHXG6DUE5Ubx+MGQ==",
             "dev": true,
             "license": "MIT",
             "dependencies": {
@@ -221,9 +221,9 @@
             }
         },
         "node_modules/@eslint/core": {
-            "version": "0.14.0",
-            "resolved": "https://registry.npmjs.org/@eslint/core/-/core-0.14.0.tgz",
-            "integrity": "sha512-qIbV0/JZr7iSDjqAc60IqbLdsj9GDt16xQtWD+B78d/HAlvysGdZZ6rpJHGAc2T0FQx1X6thsSPdnoiGKdNtdg==",
+            "version": "0.15.1",
+            "resolved": "https://registry.npmjs.org/@eslint/core/-/core-0.15.1.tgz",
+            "integrity": "sha512-bkOp+iumZCCbt1K1CmWf0R9pM5yKpDv+ZXtvSyQpudrI9kuFLp+bM2WOPXImuD/ceQuaa8f5pj93Y7zyECIGNA==",
             "dev": true,
             "license": "Apache-2.0",
             "dependencies": {
@@ -258,9 +258,9 @@
             }
         },
         "node_modules/@eslint/js": {
-            "version": "9.30.1",
-            "resolved": "https://registry.npmjs.org/@eslint/js/-/js-9.30.1.tgz",
-            "integrity": "sha512-zXhuECFlyep42KZUhWjfvsmXGX39W8K8LFb8AWXM9gSV9dQB+MrJGLKvW6Zw0Ggnbpw0VHTtrhFXYe3Gym18jg==",
+            "version": "9.32.0",
+            "resolved": "https://registry.npmjs.org/@eslint/js/-/js-9.32.0.tgz",
+            "integrity": "sha512-BBpRFZK3eX6uMLKz8WxFOBIFFcGFJ/g8XuwjTHCqHROSIsopI+ddn/d5Cfh36+7+e5edVS8dbSHnBNhrLEX0zg==",
             "dev": true,
             "license": "MIT",
             "engines": {
@@ -281,9 +281,9 @@
             }
         },
         "node_modules/@eslint/plugin-kit": {
-            "version": "0.3.3",
-            "resolved": "https://registry.npmjs.org/@eslint/plugin-kit/-/plugin-kit-0.3.3.tgz",
-            "integrity": "sha512-1+WqvgNMhmlAambTvT3KPtCl/Ibr68VldY2XY40SL1CE0ZXiakFR/cbTspaF5HsnpDMvcYYoJHfl4980NBjGag==",
+            "version": "0.3.4",
+            "resolved": "https://registry.npmjs.org/@eslint/plugin-kit/-/plugin-kit-0.3.4.tgz",
+            "integrity": "sha512-Ul5l+lHEcw3L5+k8POx6r74mxEYKG5kOb6Xpy2gCRW6zweT6TEhAf8vhxGgjhqrd/VO/Dirhsb+1hNpD1ue9hw==",
             "dev": true,
             "license": "Apache-2.0",
             "dependencies": {
@@ -294,19 +294,6 @@
                 "node": "^18.18.0 || ^20.9.0 || >=21.1.0"
             }
         },
-        "node_modules/@eslint/plugin-kit/node_modules/@eslint/core": {
-            "version": "0.15.1",
-            "resolved": "https://registry.npmjs.org/@eslint/core/-/core-0.15.1.tgz",
-            "integrity": "sha512-bkOp+iumZCCbt1K1CmWf0R9pM5yKpDv+ZXtvSyQpudrI9kuFLp+bM2WOPXImuD/ceQuaa8f5pj93Y7zyECIGNA==",
-            "dev": true,
-            "license": "Apache-2.0",
-            "dependencies": {
-                "@types/json-schema": "^7.0.15"
-            },
-            "engines": {
-                "node": "^18.18.0 || ^20.9.0 || >=21.1.0"
-            }
-        },
         "node_modules/@humanfs/core": {
             "version": "0.19.1",
             "resolved": "https://registry.npmjs.org/@humanfs/core/-/core-0.19.1.tgz",
@@ -470,9 +457,9 @@
             "license": "MIT"
         },
         "node_modules/@oven/bun-darwin-aarch64": {
-            "version": "1.2.18",
-            "resolved": "https://registry.npmjs.org/@oven/bun-darwin-aarch64/-/bun-darwin-aarch64-1.2.18.tgz",
-            "integrity": "sha512-GNxVh9VUOQ6S0aDp4Qe80MGadGbh8BS6p3jEHXIboRoTrb/80oR0csMjGUpdwGa2hX1zTvpPBwOFXvVP9UaB0Q==",
+            "version": "1.2.19",
+            "resolved": "https://registry.npmjs.org/@oven/bun-darwin-aarch64/-/bun-darwin-aarch64-1.2.19.tgz",
+            "integrity": "sha512-pJBuez9gwR03Wjtk4hSSBA6QgNdhvPLbrxU4DDzVY8Ee+Q67xNkU0CMK6rFdQF8Qetj2R+Vf8AJDlwAc1QdG1w==",
             "cpu": [
                 "arm64"
             ],
@@ -484,9 +471,9 @@
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         "node_modules/@oven/bun-darwin-x64": {
-            "version": "1.2.18",
-            "resolved": "https://registry.npmjs.org/@oven/bun-darwin-x64/-/bun-darwin-x64-1.2.18.tgz",
-            "integrity": "sha512-/oxsG7eIkvw3rxt3V9gqY23i0ajk8m1cG/FedRj8b15GW2TgA+F9F6FQNLqxc/59SBkcrbTLoqk5EtAQwuwi/w==",
+            "version": "1.2.19",
+            "resolved": "https://registry.npmjs.org/@oven/bun-darwin-x64/-/bun-darwin-x64-1.2.19.tgz",
+            "integrity": "sha512-dsgmgDOG++JsQ3wXEyTiUzhT/4wqcnAxfCQOPho6LgosVUPs6etn01uA1yCySjSk8DrugQIivXB2TaqoOrhKJg==",
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                 "x64"
             ],
@@ -498,9 +485,9 @@
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         "node_modules/@oven/bun-darwin-x64-baseline": {
-            "version": "1.2.18",
-            "resolved": "https://registry.npmjs.org/@oven/bun-darwin-x64-baseline/-/bun-darwin-x64-baseline-1.2.18.tgz",
-            "integrity": "sha512-LT/MF4DySLjskZf4mUgVXhpDBCuGXI7+uHJTiAjinddglh7ENbrSRuM01cjlJ/dxivvekq5+w6k9gdYpHUibuw==",
+            "version": "1.2.19",
+            "resolved": "https://registry.npmjs.org/@oven/bun-darwin-x64-baseline/-/bun-darwin-x64-baseline-1.2.19.tgz",
+            "integrity": "sha512-fOqbLeP3MoSbeosykTp1+BYSKDJxdjWKyxbPqHTJK2Mnt78+LPTE2yQbCzUL5LBLSRVkIxbTyIcEZxVg3eJmYg==",
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                 "x64"
             ],
@@ -512,9 +499,9 @@
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         "node_modules/@oven/bun-linux-aarch64": {
-            "version": "1.2.18",
-            "resolved": "https://registry.npmjs.org/@oven/bun-linux-aarch64/-/bun-linux-aarch64-1.2.18.tgz",
-            "integrity": "sha512-0uTiUZJFS69LbYPCw963BAdP4wvUXEozbNf7vrB/3rT82x+fPZKF3C+4nfFScm+6UYusjH468vG7/g9x38jBIg==",
+            "version": "1.2.19",
+            "resolved": "https://registry.npmjs.org/@oven/bun-linux-aarch64/-/bun-linux-aarch64-1.2.19.tgz",
+            "integrity": "sha512-G4WYbvpfrR5dLBZQoNmYzt8DBguMpPeCz6feU3Qv9E6NmA3xiqyItyDAVgDJrllPk6hvbMi9dYNxXn0NVTjMfw==",
             "cpu": [
                 "arm64"
             ],
@@ -526,9 +513,9 @@
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         "node_modules/@oven/bun-linux-aarch64-musl": {
-            "version": "1.2.18",
-            "resolved": "https://registry.npmjs.org/@oven/bun-linux-aarch64-musl/-/bun-linux-aarch64-musl-1.2.18.tgz",
-            "integrity": "sha512-hk58uY6LSvDn2WDB8o/WAVCOZERYZPShUujI8rCwcDXkQRI4pbm5B5RJP5wEF0fClRI+WXxyyoBFsTKb7lbgyQ==",
+            "version": "1.2.19",
+            "resolved": "https://registry.npmjs.org/@oven/bun-linux-aarch64-musl/-/bun-linux-aarch64-musl-1.2.19.tgz",
+            "integrity": "sha512-awB1ZEh7AbxXGemT/d33F6F4bwClWSFjhcatrweG5o5gh16c4pBKTldg/TUY9EEFrQJVyYQklgl/D919GDLTFA==",
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                 "aarch64"
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@@ -540,9 +527,9 @@
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         "node_modules/@oven/bun-linux-x64": {
-            "version": "1.2.18",
-            "resolved": "https://registry.npmjs.org/@oven/bun-linux-x64/-/bun-linux-x64-1.2.18.tgz",
-            "integrity": "sha512-okHdy9+Yov5BvI19FynnvsmQUP477SNJRv33TIHxs9cpj/ClgaYXMihS+yH0LCzYDFIeojfABiIHdBVUFmxqtQ==",
+            "version": "1.2.19",
+            "resolved": "https://registry.npmjs.org/@oven/bun-linux-x64/-/bun-linux-x64-1.2.19.tgz",
+            "integrity": "sha512-vGhkEtcaPQjizoVAo+1hsVTixarOWxVgwbYZHgoi/pGGIdWWBGNlWnIUQirOv8JVtCMnzkYqrPMHR3EqSvQoFg==",
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@@ -554,9 +541,9 @@
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-            "version": "1.2.18",
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-            "integrity": "sha512-ERnR7gZz/YYpo/ZhRKXvY9qtsJNQnTrp5HayExfvD1achoHcYEvf3TarajRLVC7gDi7BxlaOPZyJjgdo5g0tUg==",
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+            "resolved": "https://registry.npmjs.org/@oven/bun-linux-x64-baseline/-/bun-linux-x64-baseline-1.2.19.tgz",
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@@ -568,9 +555,9 @@
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@@ -582,9 +569,9 @@
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-            "version": "1.2.18",
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+            "resolved": "https://registry.npmjs.org/@oven/bun-linux-x64-musl-baseline/-/bun-linux-x64-musl-baseline-1.2.19.tgz",
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@@ -596,9 +583,9 @@
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+            "resolved": "https://registry.npmjs.org/@oven/bun-windows-x64/-/bun-windows-x64-1.2.19.tgz",
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+            "resolved": "https://registry.npmjs.org/@oven/bun-windows-x64-baseline/-/bun-windows-x64-baseline-1.2.19.tgz",
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@@ -624,13 +611,13 @@
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             "dev": true,
             "license": "Apache-2.0",
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-                "playwright": "1.54.0"
+                "playwright": "1.54.2"
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                 "playwright": "cli.js"
@@ -738,9 +725,9 @@
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@@ -752,9 +739,9 @@
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@@ -766,9 +753,9 @@
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@@ -780,9 +767,9 @@
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-            "resolved": "https://registry.npmjs.org/eslint/-/eslint-9.30.1.tgz",
-            "integrity": "sha512-zmxXPNMOXmwm9E0yQLi5uqXHs7uq2UIiqEKo3Gq+3fwo1XrJ+hijAZImyF7hclW3E6oHz43Yk3RP8at6OTKflQ==",
+            "version": "9.32.0",
+            "resolved": "https://registry.npmjs.org/eslint/-/eslint-9.32.0.tgz",
+            "integrity": "sha512-LSehfdpgMeWcTZkWZVIJl+tkZ2nuSkyyB9C27MZqFWXuph7DvaowgcTvKqxvpLW1JZIk8PN7hFY3Rj9LQ7m7lg==",
             "dev": true,
             "license": "MIT",
             "dependencies": {
@@ -1807,10 +1794,10 @@
                 "@eslint-community/regexpp": "^4.12.1",
                 "@eslint/config-array": "^0.21.0",
                 "@eslint/config-helpers": "^0.3.0",
-                "@eslint/core": "^0.14.0",
+                "@eslint/core": "^0.15.0",
                 "@eslint/eslintrc": "^3.3.1",
-                "@eslint/js": "9.30.1",
-                "@eslint/plugin-kit": "^0.3.1",
+                "@eslint/js": "9.32.0",
+                "@eslint/plugin-kit": "^0.3.4",
                 "@humanfs/node": "^0.16.6",
                 "@humanwhocodes/module-importer": "^1.0.1",
                 "@humanwhocodes/retry": "^0.4.2",
@@ -2687,9 +2674,9 @@
             "license": "ISC"
         },
         "node_modules/picomatch": {
-            "version": "4.0.2",
-            "resolved": "https://registry.npmjs.org/picomatch/-/picomatch-4.0.2.tgz",
-            "integrity": "sha512-M7BAV6Rlcy5u+m6oPhAPFgJTzAioX/6B0DxyvDlo9l8+T3nLKbrczg2WLUyzd45L8RqfUMyGPzekbMvX2Ldkwg==",
+            "version": "4.0.3",
+            "resolved": "https://registry.npmjs.org/picomatch/-/picomatch-4.0.3.tgz",
+            "integrity": "sha512-5gTmgEY/sqK6gFXLIsQNH19lWb4ebPDLA4SdLP7dsWkIXHWlG66oPuVvXSGFPppYZz8ZDZq0dYYrbHfBCVUb1Q==",
             "dev": true,
             "license": "MIT",
             "engines": {
@@ -2719,13 +2706,13 @@
             "license": "ISC"
         },
         "node_modules/playwright": {
-            "version": "1.54.0",
-            "resolved": "https://registry.npmjs.org/playwright/-/playwright-1.54.0.tgz",
-            "integrity": "sha512-y9yzHmXRwEUOpghM7XGcA38GjWuTOUMaTIcm/5rHcYVjh5MSp9qQMRRMc/+p1cx+csoPnX4wkxAF61v5VKirxg==",
+            "version": "1.54.2",
+            "resolved": "https://registry.npmjs.org/playwright/-/playwright-1.54.2.tgz",
+            "integrity": "sha512-Hu/BMoA1NAdRUuulyvQC0pEqZ4vQbGfn8f7wPXcnqQmM+zct9UliKxsIkLNmz/ku7LElUNqmaiv1TG/aL5ACsw==",
             "dev": true,
             "license": "Apache-2.0",
             "dependencies": {
-                "playwright-core": "1.54.0"
+                "playwright-core": "1.54.2"
             },
             "bin": {
                 "playwright": "cli.js"
@@ -2738,9 +2725,9 @@
             }
         },
         "node_modules/playwright-core": {
-            "version": "1.54.0",
-            "resolved": "https://registry.npmjs.org/playwright-core/-/playwright-core-1.54.0.tgz",
-            "integrity": "sha512-uiWpWaJh3R3etpJ0QrpligEMl62Dk1iSAB6NUXylvmQz+e3eipXHDHvOvydDAssb5Oqo0E818qdn0L9GcJSTyA==",
+            "version": "1.54.2",
+            "resolved": "https://registry.npmjs.org/playwright-core/-/playwright-core-1.54.2.tgz",
+            "integrity": "sha512-n5r4HFbMmWsB4twG7tJLDN9gmBUeSPcsBZiWSE4DnYz9mJMAFqr2ID7+eGC9kpEnxExJ1epttwR59LEWCk8mtA==",
             "dev": true,
             "license": "Apache-2.0",
             "bin": {
@@ -2751,19 +2738,19 @@
             }
         },
         "node_modules/polyscript": {
-            "version": "0.18.3",
-            "resolved": "https://registry.npmjs.org/polyscript/-/polyscript-0.18.3.tgz",
-            "integrity": "sha512-0iB4AmSbTZh2cJZSzP7EkeNa0Im6tVUN6+3eBUtrkMzL1vtcpSrtIVEs0X1fZ5xWHdmczafHx5PPoMe1zSXE9g==",
+            "version": "0.18.9",
+            "resolved": "https://registry.npmjs.org/polyscript/-/polyscript-0.18.9.tgz",
+            "integrity": "sha512-J42ihpBIuvM6rJXvfH4BHsH2siWZ4zoU7Jjbb40AdAVn/6S5tizzC2zkXno8nJlnrVMcrGTq9Mt8XXaBPJmLQA==",
             "license": "APACHE-2.0",
             "dependencies": {
-                "@webreflection/fetch": "^0.1.5",
+                "@webreflection/fetch": "^0.2.0",
                 "@webreflection/idb-map": "^0.3.2",
                 "@webreflection/utils": "^0.1.1",
                 "basic-devtools": "^0.1.6",
                 "codedent": "^0.1.2",
-                "coincident": "^4.0.21",
+                "coincident": "^4.0.22",
                 "html-escaper": "^3.0.3",
-                "reflected-ffi": "^0.5.8",
+                "reflected-ffi": "^0.6.0",
                 "sticky-module": "^0.1.1",
                 "to-json-callback": "^0.1.1"
             }
@@ -3447,9 +3434,9 @@
             }
         },
         "node_modules/reflected-ffi": {
-            "version": "0.5.9",
-            "resolved": "https://registry.npmjs.org/reflected-ffi/-/reflected-ffi-0.5.9.tgz",
-            "integrity": "sha512-0BH/0dbg7GsZQH7rdY/Fw3pz/FHhX2JsH4kw5hTMVKj6CQRzjH1WrYXRKJ0mkI1z84Iu5SDCfO6b8X+cDw3KaA==",
+            "version": "0.6.0",
+            "resolved": "https://registry.npmjs.org/reflected-ffi/-/reflected-ffi-0.6.0.tgz",
+            "integrity": "sha512-d17z68LkAUIL+AzY6MpuzM5bJ8eRiWW4WHZShbkxip54dLffR90lJljSM2lvRRSc21qhhhU1dtTZwuAPw9bkjg==",
             "license": "MIT"
         },
         "node_modules/resolve": {
@@ -3484,9 +3471,9 @@
             }
         },
         "node_modules/rollup": {
-            "version": "4.44.2",
-            "resolved": "https://registry.npmjs.org/rollup/-/rollup-4.44.2.tgz",
-            "integrity": "sha512-PVoapzTwSEcelaWGth3uR66u7ZRo6qhPHc0f2uRO9fX6XDVNrIiGYS0Pj9+R8yIIYSD/mCx2b16Ws9itljKSPg==",
+            "version": "4.46.2",
+            "resolved": "https://registry.npmjs.org/rollup/-/rollup-4.46.2.tgz",
+            "integrity": "sha512-WMmLFI+Boh6xbop+OAGo9cQ3OgX9MIg7xOQjn+pTCwOkk+FNDAeAemXkJ3HzDJrVXleLOFVa1ipuc1AmEx1Dwg==",
             "dev": true,
             "license": "MIT",
             "dependencies": {
@@ -3500,26 +3487,26 @@
                 "npm": ">=8.0.0"
             },
             "optionalDependencies": {
-                "@rollup/rollup-android-arm-eabi": "4.44.2",
-                "@rollup/rollup-android-arm64": "4.44.2",
-                "@rollup/rollup-darwin-arm64": "4.44.2",
-                "@rollup/rollup-darwin-x64": "4.44.2",
-                "@rollup/rollup-freebsd-arm64": "4.44.2",
-                "@rollup/rollup-freebsd-x64": "4.44.2",
-                "@rollup/rollup-linux-arm-gnueabihf": "4.44.2",
-                "@rollup/rollup-linux-arm-musleabihf": "4.44.2",
-                "@rollup/rollup-linux-arm64-gnu": "4.44.2",
-                "@rollup/rollup-linux-arm64-musl": "4.44.2",
-                "@rollup/rollup-linux-loongarch64-gnu": "4.44.2",
-                "@rollup/rollup-linux-powerpc64le-gnu": "4.44.2",
-                "@rollup/rollup-linux-riscv64-gnu": "4.44.2",
-                "@rollup/rollup-linux-riscv64-musl": "4.44.2",
-                "@rollup/rollup-linux-s390x-gnu": "4.44.2",
-                "@rollup/rollup-linux-x64-gnu": "4.44.2",
-                "@rollup/rollup-linux-x64-musl": "4.44.2",
-                "@rollup/rollup-win32-arm64-msvc": "4.44.2",
-                "@rollup/rollup-win32-ia32-msvc": "4.44.2",
-                "@rollup/rollup-win32-x64-msvc": "4.44.2",
+                "@rollup/rollup-android-arm-eabi": "4.46.2",
+                "@rollup/rollup-android-arm64": "4.46.2",
+                "@rollup/rollup-darwin-arm64": "4.46.2",
+                "@rollup/rollup-darwin-x64": "4.46.2",
+                "@rollup/rollup-freebsd-arm64": "4.46.2",
+                "@rollup/rollup-freebsd-x64": "4.46.2",
+                "@rollup/rollup-linux-arm-gnueabihf": "4.46.2",
+                "@rollup/rollup-linux-arm-musleabihf": "4.46.2",
+                "@rollup/rollup-linux-arm64-gnu": "4.46.2",
+                "@rollup/rollup-linux-arm64-musl": "4.46.2",
+                "@rollup/rollup-linux-loongarch64-gnu": "4.46.2",
+                "@rollup/rollup-linux-ppc64-gnu": "4.46.2",
+                "@rollup/rollup-linux-riscv64-gnu": "4.46.2",
+                "@rollup/rollup-linux-riscv64-musl": "4.46.2",
+                "@rollup/rollup-linux-s390x-gnu": "4.46.2",
+                "@rollup/rollup-linux-x64-gnu": "4.46.2",
+                "@rollup/rollup-linux-x64-musl": "4.46.2",
+                "@rollup/rollup-win32-arm64-msvc": "4.46.2",
+                "@rollup/rollup-win32-ia32-msvc": "4.46.2",
+                "@rollup/rollup-win32-x64-msvc": "4.46.2",
                 "fsevents": "~2.3.2"
             }
         },
@@ -3890,9 +3877,9 @@
             "license": "ISC"
         },
         "node_modules/typescript": {
-            "version": "5.8.3",
-            "resolved": "https://registry.npmjs.org/typescript/-/typescript-5.8.3.tgz",
-            "integrity": "sha512-p1diW6TqL9L07nNxvRMM7hMMw4c5XOo/1ibL4aAIGmSAt9slTE1Xgw5KWuof2uTOvCg9BY7ZRi+GaF+7sfgPeQ==",
+            "version": "5.9.2",
+            "resolved": "https://registry.npmjs.org/typescript/-/typescript-5.9.2.tgz",
+            "integrity": "sha512-CWBzXQrc/qOkhidw1OzBTQuYRbfyxDXJMVJ1XNwUHGROVmuaeiEm3OslpZ1RV96d7SKKjZKrSJu3+t/xlw3R9A==",
             "dev": true,
             "license": "Apache-2.0",
             "bin": {
diff --git a/core/package.json b/core/package.json
index 1a09744e..e1c00a0e 100644
--- a/core/package.json
+++ b/core/package.json
@@ -1,6 +1,6 @@
 {
     "name": "@pyscript/core",
-    "version": "0.6.65",
+    "version": "0.6.70",
     "type": "module",
     "description": "PyScript",
     "module": "./index.js",
@@ -42,7 +42,7 @@
     },
     "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",
@@ -70,7 +70,7 @@
         "@webreflection/utils": "^0.1.1",
         "add-promise-listener": "^0.1.3",
         "basic-devtools": "^0.1.6",
-        "polyscript": "^0.18.3",
+        "polyscript": "^0.18.9",
         "sticky-module": "^0.1.1",
         "to-json-callback": "^0.1.1",
         "type-checked-collections": "^0.1.7"
@@ -80,8 +80,8 @@
         "@codemirror/lang-python": "^6.2.1",
         "@codemirror/language": "^6.11.2",
         "@codemirror/state": "^6.5.2",
-        "@codemirror/view": "^6.38.0",
-        "@playwright/test": "^1.54.0",
+        "@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",
@@ -89,18 +89,18 @@
         "@xterm/addon-fit": "^0.10.0",
         "@xterm/addon-web-links": "^0.11.0",
         "@xterm/xterm": "^5.5.0",
-        "bun": "^1.2.18",
+        "bun": "^1.2.19",
         "chokidar": "^4.0.3",
         "codedent": "^0.1.2",
         "codemirror": "^6.0.2",
-        "eslint": "^9.30.1",
+        "eslint": "^9.32.0",
         "flatted": "^3.3.3",
-        "rollup": "^4.44.2",
+        "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": "^5.8.3",
+        "typescript": "^5.9.2",
         "xterm-readline": "^1.1.2"
     },
     "repository": {
diff --git a/core/src/stdlib/pyscript.js b/core/src/stdlib/pyscript.js
index e44ef958..13a98761 100644
--- a/core/src/stdlib/pyscript.js
+++ b/core/src/stdlib/pyscript.js
@@ -2,17 +2,17 @@
 export default {
   "pyscript": {
     "__init__.py": "from polyscript import lazy_py_modules as py_import\nfrom pyscript.magic_js import RUNNING_IN_WORKER,PyWorker,config,current_target,document,js_import,js_modules,sync,window\nfrom pyscript.display import HTML,display\nfrom pyscript.fetch import fetch\nfrom pyscript.storage import Storage,storage\nfrom pyscript.websocket import WebSocket\nfrom pyscript.events import when,Event\nif not RUNNING_IN_WORKER:from pyscript.workers import create_named_worker,workers",
-    "display.py": "_L='_repr_mimebundle_'\n_K='image/svg+xml'\n_J='application/json'\n_I='__repr__'\n_H='savefig'\n_G='text/html'\n_F='image/jpeg'\n_E='application/javascript'\n_D='utf-8'\n_C='text/plain'\n_B='image/png'\n_A=None\nimport base64,html,io,re\nfrom pyscript.magic_js import current_target,document,window\n_MIME_METHODS={_H:_B,'_repr_javascript_':_E,'_repr_json_':_J,'_repr_latex':'text/latex','_repr_png_':_B,'_repr_jpeg_':_F,'_repr_pdf_':'application/pdf','_repr_svg_':_K,'_repr_markdown_':'text/markdown','_repr_html_':_G,_I:_C}\ndef _render_image(mime,value,meta):\n\tA=value\n\tif isinstance(A,bytes):A=base64.b64encode(A).decode(_D)\n\tB=re.compile('^([A-Za-z0-9+/]{4})*([A-Za-z0-9+/]{3}=|[A-Za-z0-9+/]{2}==)?$')\n\tif len(A)>0 and not B.match(A):A=base64.b64encode(A.encode(_D)).decode(_D)\n\tC=f\"data:{mime};charset=utf-8;base64,{A}\";D=' '.join(['{k}=\"{v}\"'for(A,B)in meta.items()]);return f'<img src=\"{C}\" {D}></img>'\ndef _identity(value,meta):return value\n_MIME_RENDERERS={_C:html.escape,_G:_identity,_B:lambda value,meta:_render_image(_B,value,meta),_F:lambda value,meta:_render_image(_F,value,meta),_K:_identity,_J:_identity,_E:lambda value,meta:f\"<script>{value}<\\\\/script>\"}\nclass HTML:\n\tdef __init__(A,html):A._html=html\n\tdef _repr_html_(A):return A._html\ndef _eval_formatter(obj,print_method):\n\tB=obj;A=print_method\n\tif A==_I:return repr(B)\n\tif hasattr(B,A):\n\t\tif A==_H:C=io.BytesIO();B.savefig(C,format='png');C.seek(0);return base64.b64encode(C.read()).decode(_D)\n\t\treturn getattr(B,A)()\n\tif A==_L:return{},{}\ndef _format_mime(obj):\n\tC=obj\n\tif isinstance(C,str):return html.escape(C),_C\n\tD=_eval_formatter(C,_L)\n\tif isinstance(D,tuple):E,I=D\n\telse:E=D\n\tA,F=_A,[]\n\tfor(H,B)in _MIME_METHODS.items():\n\t\tif B in E:A=E[B]\n\t\telse:A=_eval_formatter(C,H)\n\t\tif A is _A:continue\n\t\tif B not in _MIME_RENDERERS:F.append(B);continue\n\t\tbreak\n\tif A is _A:\n\t\tif F:window.console.warn(f\"Rendered object requested unavailable MIME renderers: {F}\")\n\t\tA=repr(A);B=_C\n\telif isinstance(A,tuple):A,G=A\n\telse:G={}\n\treturn _MIME_RENDERERS[B](A,G),B\ndef _write(element,value,append=False):\n\tB=element;C,D=_format_mime(value)\n\tif C=='\\\\n':return\n\tif append:A=document.createElement('div');B.append(A)\n\telse:\n\t\tA=B.lastElementChild\n\t\tif A is _A:A=B\n\tif D in(_E,_G):E=document.createRange().createContextualFragment(C);A.append(E)\n\telse:A.innerHTML=C\ndef display(*E,target=_A,append=True):\n\tD=append;A=target\n\tif A is _A:A=current_target()\n\telif not isinstance(A,str):C=f\"target must be str or None, not {A.__class__.__name__}\";raise TypeError(C)\n\telif A=='':C='Cannot have an empty target';raise ValueError(C)\n\telif A.startswith('#'):A=A[1:]\n\tB=document.getElementById(A)\n\tif B is _A:C=f\"Invalid selector with id={A}. Cannot be found in the page.\";raise ValueError(C)\n\tif B.tagName=='SCRIPT'and hasattr(B,'target'):B=B.target\n\tfor F in E:\n\t\tif not D:B.replaceChildren()\n\t\t_write(B,F,append=D)",
+    "display.py": "_K='_repr_mimebundle_'\n_J='image/svg+xml'\n_I='application/json'\n_H='__repr__'\n_G='savefig'\n_F='text/html'\n_E='image/jpeg'\n_D='application/javascript'\n_C='utf-8'\n_B='text/plain'\n_A='image/png'\nimport base64,html,io,re\nfrom pyscript.magic_js import current_target,document,window\nfrom pyscript.ffi import is_none\n_MIME_METHODS={_G:_A,'_repr_javascript_':_D,'_repr_json_':_I,'_repr_latex':'text/latex','_repr_png_':_A,'_repr_jpeg_':_E,'_repr_pdf_':'application/pdf','_repr_svg_':_J,'_repr_markdown_':'text/markdown','_repr_html_':_F,_H:_B}\ndef _render_image(mime,value,meta):\n\tA=value\n\tif isinstance(A,bytes):A=base64.b64encode(A).decode(_C)\n\tB=re.compile('^([A-Za-z0-9+/]{4})*([A-Za-z0-9+/]{3}=|[A-Za-z0-9+/]{2}==)?$')\n\tif len(A)>0 and not B.match(A):A=base64.b64encode(A.encode(_C)).decode(_C)\n\tC=f\"data:{mime};charset=utf-8;base64,{A}\";D=' '.join(['{k}=\"{v}\"'for(A,B)in meta.items()]);return f'<img src=\"{C}\" {D}></img>'\ndef _identity(value,meta):return value\n_MIME_RENDERERS={_B:html.escape,_F:_identity,_A:lambda value,meta:_render_image(_A,value,meta),_E:lambda value,meta:_render_image(_E,value,meta),_J:_identity,_I:_identity,_D:lambda value,meta:f\"<script>{value}<\\\\/script>\"}\nclass HTML:\n\tdef __init__(A,html):A._html=html\n\tdef _repr_html_(A):return A._html\ndef _eval_formatter(obj,print_method):\n\tB=obj;A=print_method\n\tif A==_H:return repr(B)\n\tif hasattr(B,A):\n\t\tif A==_G:C=io.BytesIO();B.savefig(C,format='png');C.seek(0);return base64.b64encode(C.read()).decode(_C)\n\t\treturn getattr(B,A)()\n\tif A==_K:return{},{}\ndef _format_mime(obj):\n\tC=obj\n\tif isinstance(C,str):return html.escape(C),_B\n\tD=_eval_formatter(C,_K)\n\tif isinstance(D,tuple):E,I=D\n\telse:E=D\n\tA,F=None,[]\n\tfor(H,B)in _MIME_METHODS.items():\n\t\tif B in E:A=E[B]\n\t\telse:A=_eval_formatter(C,H)\n\t\tif is_none(A):continue\n\t\tif B not in _MIME_RENDERERS:F.append(B);continue\n\t\tbreak\n\tif is_none(A):\n\t\tif F:window.console.warn(f\"Rendered object requested unavailable MIME renderers: {F}\")\n\t\tA=repr(A);B=_B\n\telif isinstance(A,tuple):A,G=A\n\telse:G={}\n\treturn _MIME_RENDERERS[B](A,G),B\ndef _write(element,value,append=False):\n\tB=element;C,D=_format_mime(value)\n\tif C=='\\\\n':return\n\tif append:A=document.createElement('div');B.append(A)\n\telse:\n\t\tA=B.lastElementChild\n\t\tif is_none(A):A=B\n\tif D in(_D,_F):E=document.createRange().createContextualFragment(C);A.append(E)\n\telse:A.innerHTML=C\ndef display(*E,target=None,append=True):\n\tD=append;A=target\n\tif is_none(A):A=current_target()\n\telif not isinstance(A,str):C=f\"target must be str or None, not {A.__class__.__name__}\";raise TypeError(C)\n\telif A=='':C='Cannot have an empty target';raise ValueError(C)\n\telif A.startswith('#'):A=A[1:]\n\tB=document.getElementById(A)\n\tif is_none(B):C=f\"Invalid selector with id={A}. Cannot be found in the page.\";raise ValueError(C)\n\tif B.tagName=='SCRIPT'and hasattr(B,'target'):B=B.target\n\tfor F in E:\n\t\tif not D:B.replaceChildren()\n\t\t_write(B,F,append=D)",
     "events.py": "import asyncio,inspect,sys\nfrom functools import wraps\nfrom pyscript.magic_js import document\nfrom pyscript.ffi import create_proxy\nfrom pyscript.util import is_awaitable\nfrom pyscript import config\nclass Event:\n\tdef __init__(A):A._listeners=[]\n\tdef trigger(C,result):\n\t\tB=result\n\t\tfor A in C._listeners:\n\t\t\tif is_awaitable(A):asyncio.create_task(A(B))\n\t\t\telse:A(B)\n\tdef add_listener(B,listener):\n\t\tA=listener\n\t\tif is_awaitable(A)or callable(A):\n\t\t\tif A not in B._listeners:B._listeners.append(A)\n\t\telse:C='Listener must be callable or awaitable.';raise ValueError(C)\n\tdef remove_listener(A,*B):\n\t\tif B:\n\t\t\tfor C in B:A._listeners.remove(C)\n\t\telse:A._listeners=[]\ndef when(target,*B,**D):\n\tG='handler';C=target;E=None\n\tif B and(callable(B[0])or is_awaitable(B[0])):E=B[0]\n\telif callable(D.get(G))or is_awaitable(D.get(G)):E=D.pop(G)\n\tif isinstance(C,str):\n\t\tA=B[0]if B else D.pop('selector')\n\t\tif not A:I='No selector provided.';raise ValueError(I)\n\t\tfrom pyscript.web import Element as J,ElementCollection as K\n\t\tif isinstance(A,str):F=document.querySelectorAll(A)\n\t\telif isinstance(A,J):F=[A._dom_element]\n\t\telif isinstance(A,K):F=[A._dom_element for A in A]\n\t\telse:F=A if isinstance(A,list)else[A]\n\tdef H(func):\n\t\tE='positional arguments';D='takes';A=func\n\t\tif config['type']=='mpy':\n\t\t\tif is_awaitable(A):\n\t\t\t\tasync def B(*C,**F):\n\t\t\t\t\ttry:return await A(*C,**F)\n\t\t\t\t\texcept TypeError as B:\n\t\t\t\t\t\tif D in str(B)and E in str(B):return await A()\n\t\t\t\t\t\traise\n\t\t\telse:\n\t\t\t\tdef B(*C,**F):\n\t\t\t\t\ttry:return A(*C,**F)\n\t\t\t\t\texcept TypeError as B:\n\t\t\t\t\t\tif D in str(B)and E in str(B):return A()\n\t\t\t\t\t\traise\n\t\telse:\n\t\t\tG=inspect.signature(A)\n\t\t\tif G.parameters:\n\t\t\t\tif is_awaitable(A):\n\t\t\t\t\tasync def B(event):return await A(event)\n\t\t\t\telse:B=A\n\t\t\telif is_awaitable(A):\n\t\t\t\tasync def B(*B,**C):return await A()\n\t\t\telse:\n\t\t\t\tdef B(*B,**C):return A()\n\t\tB=wraps(A)(B)\n\t\tif isinstance(C,Event):C.add_listener(B)\n\t\telif isinstance(C,list)and all(isinstance(A,Event)for A in C):\n\t\t\tfor H in C:H.add_listener(B)\n\t\telse:\n\t\t\tfor I in F:I.addEventListener(C,create_proxy(B))\n\t\treturn B\n\treturn H(E)if E else H",
     "fetch.py": "import json,js\nfrom pyscript.util import as_bytearray\nclass _Response:\n\tdef __init__(A,response):A._response=response\n\tdef __getattr__(A,attr):return getattr(A._response,attr)\n\tasync def arrayBuffer(B):\n\t\tA=await B._response.arrayBuffer()\n\t\tif hasattr(A,'to_py'):return A.to_py()\n\t\treturn memoryview(as_bytearray(A))\n\tasync def blob(A):return await A._response.blob()\n\tasync def bytearray(A):B=await A._response.arrayBuffer();return as_bytearray(B)\n\tasync def json(A):return json.loads(await A.text())\n\tasync def text(A):return await A._response.text()\nclass _DirectResponse:\n\t@staticmethod\n\tdef setup(promise,response):A=promise;A._response=_Response(response);return A._response\n\tdef __init__(B,promise):A=promise;B._promise=A;A._response=None;A.arrayBuffer=B.arrayBuffer;A.blob=B.blob;A.bytearray=B.bytearray;A.json=B.json;A.text=B.text\n\tasync def _response(A):\n\t\tif not A._promise._response:await A._promise\n\t\treturn A._promise._response\n\tasync def arrayBuffer(A):B=await A._response();return await B.arrayBuffer()\n\tasync def blob(A):B=await A._response();return await B.blob()\n\tasync def bytearray(A):B=await A._response();return await B.bytearray()\n\tasync def json(A):B=await A._response();return await B.json()\n\tasync def text(A):B=await A._response();return await B.text()\ndef fetch(url,**B):C=js.JSON.parse(json.dumps(B));D=lambda response,*B:_DirectResponse.setup(A,response);A=js.fetch(url,C).then(D);_DirectResponse(A);return A",
-    "ffi.py": "try:\n\timport js;from pyodide.ffi import create_proxy as _cp,to_js as _py_tjs;from_entries=js.Object.fromEntries\n\tdef _tjs(value,**A):\n\t\tB='dict_converter'\n\t\tif not hasattr(A,B):A[B]=from_entries\n\t\treturn _py_tjs(value,**A)\nexcept:from jsffi import create_proxy as _cp;from jsffi import to_js as _tjs\ncreate_proxy=_cp\nto_js=_tjs\ntry:\n\tfrom polyscript import ffi as _ffi;direct=_ffi.direct;gather=_ffi.gather;query=_ffi.query\n\tdef assign(source,*B):\n\t\tA=source\n\t\tfor C in B:_ffi.assign(A,to_js(C))\n\t\treturn A\nexcept:\n\timport js;_assign=js.Object.assign;direct=lambda source:source\n\tdef assign(source,*B):\n\t\tA=source\n\t\tfor C in B:_assign(A,to_js(C))\n\t\treturn A",
+    "ffi.py": "try:\n\timport js;from pyodide.ffi import create_proxy as _cp,to_js as _py_tjs,jsnull;from_entries=js.Object.fromEntries;is_none=lambda value:value is None or value is jsnull\n\tdef _tjs(value,**A):\n\t\tB='dict_converter'\n\t\tif not hasattr(A,B):A[B]=from_entries\n\t\treturn _py_tjs(value,**A)\nexcept: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\ncreate_proxy=_cp\nto_js=_tjs\ntry:\n\tfrom polyscript import ffi as _ffi;direct=_ffi.direct;gather=_ffi.gather;query=_ffi.query\n\tdef assign(source,*B):\n\t\tA=source\n\t\tfor C in B:_ffi.assign(A,to_js(C))\n\t\treturn A\nexcept:\n\timport js;_assign=js.Object.assign;direct=lambda source:source\n\tdef assign(source,*B):\n\t\tA=source\n\t\tfor C in B:_assign(A,to_js(C))\n\t\treturn A",
     "flatted.py": "import json as _json\nclass _Known:\n\tdef __init__(A):A.key=[];A.value=[]\nclass _String:\n\tdef __init__(A,value):A.value=value\ndef _array_keys(value):\n\tA=[];B=0\n\tfor C in value:A.append(B);B+=1\n\treturn A\ndef _object_keys(value):\n\tA=[]\n\tfor B in value:A.append(B)\n\treturn A\ndef _is_array(value):return isinstance(value,(list,tuple))\ndef _is_object(value):return isinstance(value,dict)\ndef _is_string(value):return isinstance(value,str)\ndef _index(known,input,value):B=value;A=known;input.append(B);C=str(len(input)-1);A.key.append(B);A.value.append(C);return C\ndef _loop(keys,input,known,output):\n\tA=output\n\tfor B in keys:\n\t\tC=A[B]\n\t\tif isinstance(C,_String):_ref(B,input[int(C.value)],input,known,A)\n\treturn A\ndef _ref(key,value,input,known,output):\n\tB=known;A=value\n\tif _is_array(A)and A not in B:B.append(A);A=_loop(_array_keys(A),input,B,A)\n\telif _is_object(A)and A not in B:B.append(A);A=_loop(_object_keys(A),input,B,A)\n\toutput[key]=A\ndef _relate(known,input,value):\n\tB=known;A=value\n\tif _is_string(A)or _is_array(A)or _is_object(A):\n\t\ttry:return B.value[B.key.index(A)]\n\t\texcept:return _index(B,input,A)\n\treturn A\ndef _transform(known,input,value):\n\tB=known;A=value\n\tif _is_array(A):\n\t\tC=[]\n\t\tfor F in A:C.append(_relate(B,input,F))\n\t\treturn C\n\tif _is_object(A):\n\t\tD={}\n\t\tfor E in A:D[E]=_relate(B,input,A[E])\n\t\treturn D\n\treturn A\ndef _wrap(value):\n\tA=value\n\tif _is_string(A):return _String(A)\n\tif _is_array(A):\n\t\tB=0\n\t\tfor D in A:A[B]=_wrap(D);B+=1\n\telif _is_object(A):\n\t\tfor C in A:A[C]=_wrap(A[C])\n\treturn A\ndef parse(value,*C,**D):\n\tA=value;E=_json.loads(A,*C,**D);B=[]\n\tfor A in E:B.append(_wrap(A))\n\tinput=[]\n\tfor A in B:\n\t\tif isinstance(A,_String):input.append(A.value)\n\t\telse:input.append(A)\n\tA=input[0]\n\tif _is_array(A):return _loop(_array_keys(A),input,[A],A)\n\tif _is_object(A):return _loop(_object_keys(A),input,[A],A)\n\treturn A\ndef stringify(value,*D,**E):\n\tB=_Known();input=[];C=[];A=int(_index(B,input,value))\n\twhile A<len(input):C.append(_transform(B,input,input[A]));A+=1\n\treturn _json.dumps(C,*D,**E)",
     "fs.py": "_A='pyscript'\nmounted={}\nasync def mount(path,mode='readwrite',root='',id=_A):\n\tE=path;import js;from _pyscript import fs as A,interpreter as I;from pyscript.ffi import to_js as H;from pyscript.magic_js import RUNNING_IN_WORKER as J,sync;js.console.warn('experimental pyscript.fs ⚠️');B=None;C=f\"{E}@{id}\";F={'id':id,'mode':mode}\n\tif root!='':F['startIn']=root\n\tif J:\n\t\tG=sync.storeFSHandler(C,H(F))\n\t\tif isinstance(G,bool):D=G\n\t\telse:D=await G\n\t\tif D:from polyscript import IDBMap as K;L=K.new(A.NAMESPACE);B=await L.get(C)\n\t\telse:raise RuntimeError(A.ERROR)\n\telse:\n\t\tD=await A.idb.has(C)\n\t\tif D:B=await A.idb.get(C)\n\t\telse:B=await A.getFileSystemDirectoryHandle(H(F));await A.idb.set(C,B)\n\tmounted[E]=await I.mountNativeFS(E,B)\nasync def revoke(path,id=_A):\n\tfrom _pyscript import fs,interpreter as C;from pyscript.magic_js import RUNNING_IN_WORKER as D,sync;B=f\"{path}@{id}\"\n\tif D:A=sync.deleteFSHandler(B)\n\telse:\n\t\tA=await fs.idb.has(B)\n\t\tif A:A=await fs.idb.delete(B)\n\tif A:C._module.FS.unmount(path)\n\treturn A\nasync def sync(path):await mounted[path].syncfs()\nasync def unmount(path):from _pyscript import interpreter as A;await sync(path);A._module.FS.unmount(path)",
     "magic_js.py": "import json,sys,js as globalThis\nfrom polyscript import config as _config,js_modules\nfrom pyscript.util import NotSupported\nRUNNING_IN_WORKER=not hasattr(globalThis,'document')\nconfig=json.loads(globalThis.JSON.stringify(_config))\nif'MicroPython'in sys.version:config['type']='mpy'\nelse:config['type']='py'\nclass JSModule:\n\tdef __init__(A,name):A.name=name\n\tdef __getattr__(B,field):\n\t\tA=field\n\t\tif not A.startswith('_'):return getattr(getattr(js_modules,B.name),A)\nfor name in globalThis.Reflect.ownKeys(js_modules):sys.modules[f\"pyscript.js_modules.{name}\"]=JSModule(name)\nsys.modules['pyscript.js_modules']=js_modules\nif RUNNING_IN_WORKER:\n\timport polyscript;PyWorker=NotSupported('pyscript.PyWorker','pyscript.PyWorker works only when running in the main thread')\n\ttry:import js;window=polyscript.xworker.window;document=window.document;js.document=document;js_import=window.Function('return (...urls) => Promise.all(urls.map((url) => import(url)))')()\n\texcept:message='Unable to use `window` or `document` -> https://docs.pyscript.net/latest/faq/#sharedarraybuffer';globalThis.console.warn(message);window=NotSupported('pyscript.window',message);document=NotSupported('pyscript.document',message);js_import=None\n\tsync=polyscript.xworker.sync\n\tdef current_target():return polyscript.target\nelse:\n\timport _pyscript;from _pyscript import PyWorker as _PyWorker,js_import;from pyscript.ffi import to_js\n\tdef PyWorker(url,**A):return _PyWorker(url,to_js(A))\n\twindow=globalThis;document=globalThis.document;sync=NotSupported('pyscript.sync','pyscript.sync works only when running in a worker')\n\tdef current_target():return _pyscript.target",
     "media.py": "from pyscript import window\nfrom pyscript.ffi import to_js\nclass Device:\n\tdef __init__(A,device):A._dom_element=device\n\t@property\n\tdef id(self):return self._dom_element.deviceId\n\t@property\n\tdef group(self):return self._dom_element.groupId\n\t@property\n\tdef kind(self):return self._dom_element.kind\n\t@property\n\tdef label(self):return self._dom_element.label\n\tdef __getitem__(A,key):return getattr(A,key)\n\t@classmethod\n\tasync def load(E,audio=False,video=True):\n\t\tC='video';B=video;A={};A['audio']=audio\n\t\tif isinstance(B,bool):A[C]=B\n\t\telse:\n\t\t\tA[C]={}\n\t\t\tfor D in B:A[C][D]=B[D]\n\t\treturn await window.navigator.mediaDevices.getUserMedia(to_js(A))\n\tasync def get_stream(A):B=A.kind.replace('input','').replace('output','');C={B:{'deviceId':{'exact':A.id}}};return await A.load(**C)\nasync def list_devices():return[Device(A)for A in await window.navigator.mediaDevices.enumerateDevices()]",
-    "storage.py": "_C='memoryview'\n_B='bytearray'\n_A='generic'\nfrom polyscript import storage as _storage\nfrom pyscript.flatted import parse as _parse\nfrom pyscript.flatted import stringify as _stringify\ndef _to_idb(value):\n\tA=value\n\tif A is None:return _stringify(['null',0])\n\tif isinstance(A,(bool,float,int,str,list,dict,tuple)):return _stringify([_A,A])\n\tif isinstance(A,bytearray):return _stringify([_B,list(A)])\n\tif isinstance(A,memoryview):return _stringify([_C,list(A)])\n\tB=f\"Unexpected value: {A}\";raise TypeError(B)\ndef _from_idb(value):\n\tC=value;A,B=_parse(C)\n\tif A=='null':return\n\tif A==_A:return B\n\tif A==_B:return bytearray(B)\n\tif A==_C:return memoryview(bytearray(B))\n\treturn C\nclass Storage(dict):\n\tdef __init__(B,store):A=store;super().__init__({A:_from_idb(B)for(A,B)in A.entries()});B.__store__=A\n\tdef __delitem__(A,attr):A.__store__.delete(attr);super().__delitem__(attr)\n\tdef __setitem__(B,attr,value):A=value;B.__store__.set(attr,_to_idb(A));super().__setitem__(attr,A)\n\tdef clear(A):A.__store__.clear();super().clear()\n\tasync def sync(A):await A.__store__.sync()\nasync def storage(name='',storage_class=Storage):\n\tif not name:A='The storage name must be defined';raise ValueError(A)\n\treturn storage_class(await _storage(f\"@pyscript/{name}\"))",
+    "storage.py": "_C='memoryview'\n_B='bytearray'\n_A='generic'\nfrom polyscript import storage as _storage\nfrom pyscript.flatted import parse as _parse\nfrom pyscript.flatted import stringify as _stringify\nfrom pyscript.ffi import is_none\ndef _to_idb(value):\n\tA=value\n\tif is_none(A):return _stringify(['null',0])\n\tif isinstance(A,(bool,float,int,str,list,dict,tuple)):return _stringify([_A,A])\n\tif isinstance(A,bytearray):return _stringify([_B,list(A)])\n\tif isinstance(A,memoryview):return _stringify([_C,list(A)])\n\tB=f\"Unexpected value: {A}\";raise TypeError(B)\ndef _from_idb(value):\n\tC=value;A,B=_parse(C)\n\tif A=='null':return\n\tif A==_A:return B\n\tif A==_B:return bytearray(B)\n\tif A==_C:return memoryview(bytearray(B))\n\treturn C\nclass Storage(dict):\n\tdef __init__(B,store):A=store;super().__init__({A:_from_idb(B)for(A,B)in A.entries()});B.__store__=A\n\tdef __delitem__(A,attr):A.__store__.delete(attr);super().__delitem__(attr)\n\tdef __setitem__(B,attr,value):A=value;B.__store__.set(attr,_to_idb(A));super().__setitem__(attr,A)\n\tdef clear(A):A.__store__.clear();super().clear()\n\tasync def sync(A):await A.__store__.sync()\nasync def storage(name='',storage_class=Storage):\n\tif not name:A='The storage name must be defined';raise ValueError(A)\n\treturn storage_class(await _storage(f\"@pyscript/{name}\"))",
     "util.py": "import js,sys,inspect\ndef as_bytearray(buffer):\n\tA=js.Uint8Array.new(buffer);B=A.length;C=bytearray(B)\n\tfor D in range(B):C[D]=A[D]\n\treturn C\nclass NotSupported:\n\tdef __init__(A,name,error):object.__setattr__(A,'name',name);object.__setattr__(A,'error',error)\n\tdef __repr__(A):return f\"<NotSupported {A.name} [{A.error}]>\"\n\tdef __getattr__(A,attr):raise AttributeError(A.error)\n\tdef __setattr__(A,attr,value):raise AttributeError(A.error)\n\tdef __call__(A,*B):raise TypeError(A.error)\ndef is_awaitable(obj):\n\tA=obj;from pyscript import config as B\n\tif B['type']=='mpy':\n\t\tif'<closure <generator>'in repr(A):return True\n\t\treturn inspect.isgeneratorfunction(A)\n\treturn inspect.iscoroutinefunction(A)",
-    "web.py": "_C='htmlFor'\n_B='on_'\n_A=None\nfrom pyscript import document,when,Event\nfrom pyscript.ffi import create_proxy\ndef wrap_dom_element(dom_element):return Element.wrap_dom_element(dom_element)\nclass Element:\n\telement_classes_by_tag_name={}\n\t@classmethod\n\tdef get_tag_name(A):return A.__name__.replace('_','')\n\t@classmethod\n\tdef register_element_classes(B,element_classes):\n\t\tfor A in element_classes:C=A.get_tag_name();B.element_classes_by_tag_name[C]=A\n\t@classmethod\n\tdef unregister_element_classes(A,element_classes):\n\t\tfor B in element_classes:C=B.get_tag_name();A.element_classes_by_tag_name.pop(C,_A)\n\t@classmethod\n\tdef wrap_dom_element(A,dom_element):B=dom_element;C=A.element_classes_by_tag_name.get(B.tagName.lower(),A);return C(dom_element=B)\n\tdef __init__(A,dom_element=_A,classes=_A,style=_A,**E):\n\t\tA._dom_element=dom_element or document.createElement(type(A).get_tag_name());A._on_events={};C={}\n\t\tfor(B,D)in E.items():\n\t\t\tif B.startswith(_B):F=A.get_event(B);F.add_listener(D)\n\t\t\telse:C[B]=D\n\t\tA._classes=Classes(A);A._style=Style(A);A.update(classes=classes,style=style,**C)\n\tdef __eq__(A,obj):return isinstance(obj,Element)and obj._dom_element==A._dom_element\n\tdef __getitem__(B,key):\n\t\tA=key\n\t\tif isinstance(A,(int,slice)):return B.children[A]\n\t\treturn B.find(A)\n\tdef __getattr__(B,name):\n\t\tA=name\n\t\tif A.startswith(_B):return B.get_event(A)\n\t\tif A.endswith('_'):A=A[:-1]\n\t\tif A=='for':A=_C\n\t\treturn getattr(B._dom_element,A)\n\tdef __setattr__(C,name,value):\n\t\tB=value;A=name\n\t\tif A.startswith('_'):super().__setattr__(A,B)\n\t\telse:\n\t\t\tif A.endswith('_'):A=A[:-1]\n\t\t\tif A=='for':A=_C\n\t\t\tif A.startswith(_B):C._on_events[A]=B\n\t\t\tsetattr(C._dom_element,A,B)\n\tdef get_event(A,name):\n\t\tB=name\n\t\tif not B.startswith(_B):C=\"Event names must start with 'on_'.\";raise ValueError(C)\n\t\tD=B[3:]\n\t\tif not hasattr(A._dom_element,D):C=f\"Element has no '{D}' event.\";raise ValueError(C)\n\t\tif B in A._on_events:return A._on_events[B]\n\t\tE=Event();A._on_events[B]=E;A._dom_element.addEventListener(D,create_proxy(E.trigger));return E\n\t@property\n\tdef children(self):return ElementCollection.wrap_dom_elements(self._dom_element.children)\n\t@property\n\tdef classes(self):return self._classes\n\t@property\n\tdef parent(self):\n\t\tif self._dom_element.parentElement is _A:return\n\t\treturn Element.wrap_dom_element(self._dom_element.parentElement)\n\t@property\n\tdef style(self):return self._style\n\tdef append(B,*C):\n\t\tfor A in C:\n\t\t\tif isinstance(A,Element):B._dom_element.appendChild(A._dom_element)\n\t\t\telif isinstance(A,ElementCollection):\n\t\t\t\tfor D in A:B._dom_element.appendChild(D._dom_element)\n\t\t\telif isinstance(A,(list,tuple)):\n\t\t\t\tfor E in A:B.append(E)\n\t\t\telse:\n\t\t\t\ttry:A.tagName;B._dom_element.appendChild(A)\n\t\t\t\texcept AttributeError:\n\t\t\t\t\ttry:\n\t\t\t\t\t\tA.length\n\t\t\t\t\t\tfor F in A:B._dom_element.appendChild(F)\n\t\t\t\t\texcept AttributeError:G=f'Element \"{A}\" is a proxy object, \"but not a valid element or a NodeList.';raise TypeError(G)\n\tdef clone(B,clone_id=_A):A=Element.wrap_dom_element(B._dom_element.cloneNode(True));A.id=clone_id;return A\n\tdef find(A,selector):return ElementCollection.wrap_dom_elements(A._dom_element.querySelectorAll(selector))\n\tdef show_me(A):A._dom_element.scrollIntoView()\n\tdef update(A,classes=_A,style=_A,**D):\n\t\tC=style;B=classes\n\t\tif B:A.classes.add(B)\n\t\tif C:A.style.set(**C)\n\t\tfor(E,F)in D.items():setattr(A,E,F)\nclass Classes:\n\tdef __init__(A,element):A._element=element;A._class_list=A._element._dom_element.classList\n\tdef __contains__(A,item):return item in A._class_list\n\tdef __eq__(C,other):\n\t\tA=other\n\t\tif isinstance(A,Classes):B=list(A._class_list)\n\t\telse:\n\t\t\ttry:B=iter(A)\n\t\t\texcept TypeError:return False\n\t\treturn set(C._class_list)==set(B)\n\tdef __iter__(A):return iter(A._class_list)\n\tdef __len__(A):return A._class_list.length\n\tdef __repr__(A):return f\"Classes({\", \".join(A._class_list)})\"\n\tdef __str__(A):return' '.join(A._class_list)\n\tdef add(B,*C):\n\t\tfor A in C:\n\t\t\tif isinstance(A,list):\n\t\t\t\tfor D in A:B.add(D)\n\t\t\telse:B._class_list.add(A)\n\tdef contains(A,class_name):return class_name in A\n\tdef remove(B,*C):\n\t\tfor A in C:\n\t\t\tif isinstance(A,list):\n\t\t\t\tfor D in A:B.remove(D)\n\t\t\telse:B._class_list.remove(A)\n\tdef replace(A,old_class,new_class):A.remove(old_class);A.add(new_class)\n\tdef toggle(A,*C):\n\t\tfor B in C:\n\t\t\tif B in A:A.remove(B)\n\t\t\telse:A.add(B)\nclass HasOptions:\n\t@property\n\tdef options(self):\n\t\tA=self\n\t\tif not hasattr(A,'_options'):A._options=Options(A)\n\t\treturn A._options\nclass Options:\n\tdef __init__(A,element):A._element=element\n\tdef __getitem__(A,key):return A.options[key]\n\tdef __iter__(A):yield from A.options\n\tdef __len__(A):return len(A.options)\n\tdef __repr__(A):return f\"{A.__class__.__name__} (length: {len(A)}) {A.options}\"\n\t@property\n\tdef options(self):return[Element.wrap_dom_element(A)for A in self._element._dom_element.options]\n\t@property\n\tdef selected(self):return self.options[self._element._dom_element.selectedIndex]\n\tdef add(D,value=_A,html=_A,text=_A,before=_A,**B):\n\t\tC=value;A=before\n\t\tif C is not _A:B['value']=C\n\t\tif html is not _A:B['innerHTML']=html\n\t\tif text is not _A:B['text']=text\n\t\tE=option(**B)\n\t\tif A and isinstance(A,Element):A=A._dom_element\n\t\tD._element._dom_element.add(E._dom_element,A)\n\tdef clear(A):\n\t\twhile len(A)>0:A.remove(0)\n\tdef remove(A,index):A._element._dom_element.remove(index)\nclass Style:\n\tdef __init__(A,element):A._element=element;A._style=A._element._dom_element.style\n\tdef __getitem__(A,key):return A._style.getPropertyValue(key)\n\tdef __setitem__(A,key,value):A._style.setProperty(key,value)\n\tdef remove(A,key):A._style.removeProperty(key)\n\tdef set(A,**B):\n\t\tfor(C,D)in B.items():A._element._dom_element.style.setProperty(C,D)\n\t@property\n\tdef visible(self):return self._element._dom_element.style.visibility\n\t@visible.setter\n\tdef visible(self,value):self._element._dom_element.style.visibility=value\nclass ContainerElement(Element):\n\tdef __init__(B,*C,children=_A,dom_element=_A,style=_A,classes=_A,**D):\n\t\tsuper().__init__(dom_element=dom_element,style=style,classes=classes,**D)\n\t\tfor A in list(C)+(children or[]):\n\t\t\tif isinstance(A,(Element,ElementCollection)):B.append(A)\n\t\t\telse:B._dom_element.insertAdjacentHTML('beforeend',A)\n\tdef __iter__(A):yield from A.children\nclass ClassesCollection:\n\tdef __init__(A,collection):A._collection=collection\n\tdef __contains__(A,class_name):\n\t\tfor B in A._collection:\n\t\t\tif class_name in B.classes:return True\n\t\treturn False\n\tdef __eq__(B,other):A=other;return isinstance(A,ClassesCollection)and B._collection==A._collection\n\tdef __iter__(A):yield from A._all_class_names()\n\tdef __len__(A):return len(A._all_class_names())\n\tdef __repr__(A):return f\"ClassesCollection({A._collection!r})\"\n\tdef __str__(A):return' '.join(A._all_class_names())\n\tdef add(A,*B):\n\t\tfor C in A._collection:C.classes.add(*B)\n\tdef contains(A,class_name):return class_name in A\n\tdef remove(A,*B):\n\t\tfor C in A._collection:C.classes.remove(*B)\n\tdef replace(A,old_class,new_class):\n\t\tfor B in A._collection:B.classes.replace(old_class,new_class)\n\tdef toggle(A,*B):\n\t\tfor C in A._collection:C.classes.toggle(*B)\n\tdef _all_class_names(B):\n\t\tA=set()\n\t\tfor C in B._collection:\n\t\t\tfor D in C.classes:A.add(D)\n\t\treturn A\nclass StyleCollection:\n\tdef __init__(A,collection):A._collection=collection\n\tdef __getitem__(A,key):return[A.style[key]for A in A._collection._elements]\n\tdef __setitem__(A,key,value):\n\t\tfor B in A._collection._elements:B.style[key]=value\n\tdef __repr__(A):return f\"StyleCollection({A._collection!r})\"\n\tdef remove(A,key):\n\t\tfor B in A._collection._elements:B.style.remove(key)\nclass ElementCollection:\n\t@classmethod\n\tdef wrap_dom_elements(A,dom_elements):return A([Element.wrap_dom_element(A)for A in dom_elements])\n\tdef __init__(A,elements):A._elements=elements;A._classes=ClassesCollection(A);A._style=StyleCollection(A)\n\tdef __eq__(A,obj):return isinstance(obj,ElementCollection)and obj._elements==A._elements\n\tdef __getitem__(B,key):\n\t\tA=key\n\t\tif isinstance(A,int):return B._elements[A]\n\t\tif isinstance(A,slice):return ElementCollection(B._elements[A])\n\t\treturn B.find(A)\n\tdef __iter__(A):yield from A._elements\n\tdef __len__(A):return len(A._elements)\n\tdef __repr__(A):return f\"{A.__class__.__name__} (length: {len(A._elements)}) {A._elements}\"\n\tdef __getattr__(A,name):return[getattr(A,name)for A in A._elements]\n\tdef __setattr__(C,name,value):\n\t\tB=value;A=name\n\t\tif A.startswith('_'):super().__setattr__(A,B)\n\t\telse:\n\t\t\tfor D in C._elements:setattr(D,A,B)\n\t@property\n\tdef classes(self):return self._classes\n\t@property\n\tdef elements(self):return self._elements\n\t@property\n\tdef style(self):return self._style\n\tdef find(B,selector):\n\t\tA=[]\n\t\tfor C in B._elements:A.extend(C.find(selector))\n\t\treturn ElementCollection(A)\nclass a(ContainerElement):0\nclass abbr(ContainerElement):0\nclass address(ContainerElement):0\nclass area(Element):0\nclass article(ContainerElement):0\nclass aside(ContainerElement):0\nclass audio(ContainerElement):0\nclass b(ContainerElement):0\nclass base(Element):0\nclass blockquote(ContainerElement):0\nclass body(ContainerElement):0\nclass br(Element):0\nclass button(ContainerElement):0\nclass canvas(ContainerElement):\n\tdef download(A,filename='snapped.png'):B=a(download=filename,href=A._dom_element.toDataURL());A.append(B);B._dom_element.click()\n\tdef draw(E,what,width=_A,height=_A):\n\t\tC=height;B=width;A=what\n\t\tif isinstance(A,Element):A=A._dom_element\n\t\tD=E._dom_element.getContext('2d')\n\t\tif B or C:D.drawImage(A,0,0,B,C)\n\t\telse:D.drawImage(A,0,0)\nclass caption(ContainerElement):0\nclass cite(ContainerElement):0\nclass code(ContainerElement):0\nclass col(Element):0\nclass colgroup(ContainerElement):0\nclass data(ContainerElement):0\nclass datalist(ContainerElement,HasOptions):0\nclass dd(ContainerElement):0\nclass del_(ContainerElement):0\nclass details(ContainerElement):0\nclass dialog(ContainerElement):0\nclass div(ContainerElement):0\nclass dl(ContainerElement):0\nclass dt(ContainerElement):0\nclass em(ContainerElement):0\nclass embed(Element):0\nclass fieldset(ContainerElement):0\nclass figcaption(ContainerElement):0\nclass figure(ContainerElement):0\nclass footer(ContainerElement):0\nclass form(ContainerElement):0\nclass h1(ContainerElement):0\nclass h2(ContainerElement):0\nclass h3(ContainerElement):0\nclass h4(ContainerElement):0\nclass h5(ContainerElement):0\nclass h6(ContainerElement):0\nclass head(ContainerElement):0\nclass header(ContainerElement):0\nclass hgroup(ContainerElement):0\nclass hr(Element):0\nclass html(ContainerElement):0\nclass i(ContainerElement):0\nclass iframe(ContainerElement):0\nclass img(Element):0\nclass input_(Element):0\nclass ins(ContainerElement):0\nclass kbd(ContainerElement):0\nclass label(ContainerElement):0\nclass legend(ContainerElement):0\nclass li(ContainerElement):0\nclass link(Element):0\nclass main(ContainerElement):0\nclass map_(ContainerElement):0\nclass mark(ContainerElement):0\nclass menu(ContainerElement):0\nclass meta(ContainerElement):0\nclass meter(ContainerElement):0\nclass nav(ContainerElement):0\nclass object_(ContainerElement):0\nclass ol(ContainerElement):0\nclass optgroup(ContainerElement,HasOptions):0\nclass option(ContainerElement):0\nclass output(ContainerElement):0\nclass p(ContainerElement):0\nclass param(ContainerElement):0\nclass picture(ContainerElement):0\nclass pre(ContainerElement):0\nclass progress(ContainerElement):0\nclass q(ContainerElement):0\nclass s(ContainerElement):0\nclass script(ContainerElement):0\nclass section(ContainerElement):0\nclass select(ContainerElement,HasOptions):0\nclass small(ContainerElement):0\nclass source(Element):0\nclass span(ContainerElement):0\nclass strong(ContainerElement):0\nclass style(ContainerElement):0\nclass sub(ContainerElement):0\nclass summary(ContainerElement):0\nclass sup(ContainerElement):0\nclass table(ContainerElement):0\nclass tbody(ContainerElement):0\nclass td(ContainerElement):0\nclass template(ContainerElement):0\nclass textarea(ContainerElement):0\nclass tfoot(ContainerElement):0\nclass th(ContainerElement):0\nclass thead(ContainerElement):0\nclass time(ContainerElement):0\nclass title(ContainerElement):0\nclass tr(ContainerElement):0\nclass track(Element):0\nclass u(ContainerElement):0\nclass ul(ContainerElement):0\nclass var(ContainerElement):0\nclass video(ContainerElement):\n\tdef snap(E,to=_A,width=_A,height=_A):\n\t\tH='CANVAS';G='Element to snap to must be a canvas.';C=height;B=width;A=to;B=B if B is not _A else E.videoWidth;C=C if C is not _A else E.videoHeight\n\t\tif A is _A:A=canvas(width=B,height=C)\n\t\telif isinstance(A,Element):\n\t\t\tif A.tag!='canvas':D=G;raise TypeError(D)\n\t\telif getattr(A,'tagName','')==H:A=canvas(dom_element=A)\n\t\telif isinstance(A,str):\n\t\t\tF=document.querySelectorAll(A)\n\t\t\tif F.length==0:D='No element with selector {to} to snap to.';raise TypeError(D)\n\t\t\tif F[0].tagName!=H:D=G;raise TypeError(D)\n\t\t\tA=canvas(dom_element=F[0])\n\t\tA.draw(E,B,C);return A\nclass wbr(Element):0\nELEMENT_CLASSES=[a,abbr,address,area,article,aside,audio,b,base,blockquote,body,br,button,canvas,caption,cite,code,col,colgroup,data,datalist,dd,del_,details,dialog,div,dl,dt,em,embed,fieldset,figcaption,figure,footer,form,h1,h2,h3,h4,h5,h6,head,header,hgroup,hr,html,i,iframe,img,input_,ins,kbd,label,legend,li,link,main,map_,mark,menu,meta,meter,nav,object_,ol,optgroup,option,output,p,param,picture,pre,progress,q,s,script,section,select,small,source,span,strong,style,sub,summary,sup,table,tbody,td,template,textarea,tfoot,th,thead,time,title,tr,track,u,ul,var,video,wbr]\nElement.register_element_classes(ELEMENT_CLASSES)\nclass Page:\n\tdef __init__(A):A.html=Element.wrap_dom_element(document.documentElement);A.body=Element.wrap_dom_element(document.body);A.head=Element.wrap_dom_element(document.head)\n\tdef __getitem__(A,selector):return A.find(selector)\n\t@property\n\tdef title(self):return document.title\n\t@title.setter\n\tdef title(self,value):document.title=value\n\tdef append(A,*B):A.body.append(*B)\n\tdef find(A,selector):return ElementCollection.wrap_dom_elements(document.querySelectorAll(selector))\npage=Page()",
+    "web.py": "_C='htmlFor'\n_B='on_'\n_A=None\nfrom pyscript import document,when,Event\nfrom pyscript.ffi import create_proxy,is_none\ndef wrap_dom_element(dom_element):return Element.wrap_dom_element(dom_element)\nclass Element:\n\telement_classes_by_tag_name={}\n\t@classmethod\n\tdef get_tag_name(A):return A.__name__.replace('_','')\n\t@classmethod\n\tdef register_element_classes(B,element_classes):\n\t\tfor A in element_classes:C=A.get_tag_name();B.element_classes_by_tag_name[C]=A\n\t@classmethod\n\tdef unregister_element_classes(A,element_classes):\n\t\tfor B in element_classes:C=B.get_tag_name();A.element_classes_by_tag_name.pop(C,_A)\n\t@classmethod\n\tdef wrap_dom_element(A,dom_element):B=dom_element;C=A.element_classes_by_tag_name.get(B.tagName.lower(),A);return C(dom_element=B)\n\tdef __init__(A,dom_element=_A,classes=_A,style=_A,**F):\n\t\tC=dom_element;A._dom_element=document.createElement(type(A).get_tag_name())if is_none(C)else C;A._on_events={};D={}\n\t\tfor(B,E)in F.items():\n\t\t\tif B.startswith(_B):G=A.get_event(B);G.add_listener(E)\n\t\t\telse:D[B]=E\n\t\tA._classes=Classes(A);A._style=Style(A);A.update(classes=classes,style=style,**D)\n\tdef __eq__(A,obj):return isinstance(obj,Element)and obj._dom_element==A._dom_element\n\tdef __getitem__(B,key):\n\t\tA=key\n\t\tif isinstance(A,(int,slice)):return B.children[A]\n\t\treturn B.find(A)\n\tdef __getattr__(B,name):\n\t\tA=name\n\t\tif A.startswith(_B):return B.get_event(A)\n\t\tif A.endswith('_'):A=A[:-1]\n\t\tif A=='for':A=_C\n\t\treturn getattr(B._dom_element,A)\n\tdef __setattr__(C,name,value):\n\t\tB=value;A=name\n\t\tif A.startswith('_'):super().__setattr__(A,B)\n\t\telse:\n\t\t\tif A.endswith('_'):A=A[:-1]\n\t\t\tif A=='for':A=_C\n\t\t\tif A.startswith(_B):C._on_events[A]=B\n\t\t\tsetattr(C._dom_element,A,B)\n\tdef get_event(A,name):\n\t\tB=name\n\t\tif not B.startswith(_B):C=\"Event names must start with 'on_'.\";raise ValueError(C)\n\t\tD=B[3:]\n\t\tif not hasattr(A._dom_element,D):C=f\"Element has no '{D}' event.\";raise ValueError(C)\n\t\tif B in A._on_events:return A._on_events[B]\n\t\tE=Event();A._on_events[B]=E;A._dom_element.addEventListener(D,create_proxy(E.trigger));return E\n\t@property\n\tdef children(self):return ElementCollection.wrap_dom_elements(self._dom_element.children)\n\t@property\n\tdef classes(self):return self._classes\n\t@property\n\tdef parent(self):\n\t\tif is_none(self._dom_element.parentElement):return\n\t\treturn Element.wrap_dom_element(self._dom_element.parentElement)\n\t@property\n\tdef style(self):return self._style\n\tdef append(B,*C):\n\t\tfor A in C:\n\t\t\tif isinstance(A,Element):B._dom_element.appendChild(A._dom_element)\n\t\t\telif isinstance(A,ElementCollection):\n\t\t\t\tfor D in A:B._dom_element.appendChild(D._dom_element)\n\t\t\telif isinstance(A,(list,tuple)):\n\t\t\t\tfor E in A:B.append(E)\n\t\t\telse:\n\t\t\t\ttry:A.tagName;B._dom_element.appendChild(A)\n\t\t\t\texcept AttributeError:\n\t\t\t\t\ttry:\n\t\t\t\t\t\tA.length\n\t\t\t\t\t\tfor F in A:B._dom_element.appendChild(F)\n\t\t\t\t\texcept AttributeError:G=f'Element \"{A}\" is a proxy object, \"but not a valid element or a NodeList.';raise TypeError(G)\n\tdef clone(B,clone_id=_A):A=Element.wrap_dom_element(B._dom_element.cloneNode(True));A.id=clone_id;return A\n\tdef find(A,selector):return ElementCollection.wrap_dom_elements(A._dom_element.querySelectorAll(selector))\n\tdef show_me(A):A._dom_element.scrollIntoView()\n\tdef update(A,classes=_A,style=_A,**D):\n\t\tC=style;B=classes\n\t\tif B:A.classes.add(B)\n\t\tif C:A.style.set(**C)\n\t\tfor(E,F)in D.items():setattr(A,E,F)\nclass Classes:\n\tdef __init__(A,element):A._element=element;A._class_list=A._element._dom_element.classList\n\tdef __contains__(A,item):return item in A._class_list\n\tdef __eq__(C,other):\n\t\tA=other\n\t\tif isinstance(A,Classes):B=list(A._class_list)\n\t\telse:\n\t\t\ttry:B=iter(A)\n\t\t\texcept TypeError:return False\n\t\treturn set(C._class_list)==set(B)\n\tdef __iter__(A):return iter(A._class_list)\n\tdef __len__(A):return A._class_list.length\n\tdef __repr__(A):return f\"Classes({\", \".join(A._class_list)})\"\n\tdef __str__(A):return' '.join(A._class_list)\n\tdef add(B,*C):\n\t\tfor A in C:\n\t\t\tif isinstance(A,list):\n\t\t\t\tfor D in A:B.add(D)\n\t\t\telse:B._class_list.add(A)\n\tdef contains(A,class_name):return class_name in A\n\tdef remove(B,*C):\n\t\tfor A in C:\n\t\t\tif isinstance(A,list):\n\t\t\t\tfor D in A:B.remove(D)\n\t\t\telse:B._class_list.remove(A)\n\tdef replace(A,old_class,new_class):A.remove(old_class);A.add(new_class)\n\tdef toggle(A,*C):\n\t\tfor B in C:\n\t\t\tif B in A:A.remove(B)\n\t\t\telse:A.add(B)\nclass HasOptions:\n\t@property\n\tdef options(self):\n\t\tA=self\n\t\tif not hasattr(A,'_options'):A._options=Options(A)\n\t\treturn A._options\nclass Options:\n\tdef __init__(A,element):A._element=element\n\tdef __getitem__(A,key):return A.options[key]\n\tdef __iter__(A):yield from A.options\n\tdef __len__(A):return len(A.options)\n\tdef __repr__(A):return f\"{A.__class__.__name__} (length: {len(A)}) {A.options}\"\n\t@property\n\tdef options(self):return[Element.wrap_dom_element(A)for A in self._element._dom_element.options]\n\t@property\n\tdef selected(self):return self.options[self._element._dom_element.selectedIndex]\n\tdef add(D,value=_A,html=_A,text=_A,before=_A,**B):\n\t\tC=value;A=before\n\t\tif C is not _A:B['value']=C\n\t\tif html is not _A:B['innerHTML']=html\n\t\tif text is not _A:B['text']=text\n\t\tE=option(**B)\n\t\tif A and isinstance(A,Element):A=A._dom_element\n\t\tD._element._dom_element.add(E._dom_element,A)\n\tdef clear(A):\n\t\twhile len(A)>0:A.remove(0)\n\tdef remove(A,index):A._element._dom_element.remove(index)\nclass Style:\n\tdef __init__(A,element):A._element=element;A._style=A._element._dom_element.style\n\tdef __getitem__(A,key):return A._style.getPropertyValue(key)\n\tdef __setitem__(A,key,value):A._style.setProperty(key,value)\n\tdef remove(A,key):A._style.removeProperty(key)\n\tdef set(A,**B):\n\t\tfor(C,D)in B.items():A._element._dom_element.style.setProperty(C,D)\n\t@property\n\tdef visible(self):return self._element._dom_element.style.visibility\n\t@visible.setter\n\tdef visible(self,value):self._element._dom_element.style.visibility=value\nclass ContainerElement(Element):\n\tdef __init__(B,*C,children=_A,dom_element=_A,style=_A,classes=_A,**D):\n\t\tsuper().__init__(dom_element=dom_element,style=style,classes=classes,**D)\n\t\tfor A in list(C)+(children or[]):\n\t\t\tif isinstance(A,(Element,ElementCollection)):B.append(A)\n\t\t\telse:B._dom_element.insertAdjacentHTML('beforeend',A)\n\tdef __iter__(A):yield from A.children\nclass ClassesCollection:\n\tdef __init__(A,collection):A._collection=collection\n\tdef __contains__(A,class_name):\n\t\tfor B in A._collection:\n\t\t\tif class_name in B.classes:return True\n\t\treturn False\n\tdef __eq__(B,other):A=other;return isinstance(A,ClassesCollection)and B._collection==A._collection\n\tdef __iter__(A):yield from A._all_class_names()\n\tdef __len__(A):return len(A._all_class_names())\n\tdef __repr__(A):return f\"ClassesCollection({A._collection!r})\"\n\tdef __str__(A):return' '.join(A._all_class_names())\n\tdef add(A,*B):\n\t\tfor C in A._collection:C.classes.add(*B)\n\tdef contains(A,class_name):return class_name in A\n\tdef remove(A,*B):\n\t\tfor C in A._collection:C.classes.remove(*B)\n\tdef replace(A,old_class,new_class):\n\t\tfor B in A._collection:B.classes.replace(old_class,new_class)\n\tdef toggle(A,*B):\n\t\tfor C in A._collection:C.classes.toggle(*B)\n\tdef _all_class_names(B):\n\t\tA=set()\n\t\tfor C in B._collection:\n\t\t\tfor D in C.classes:A.add(D)\n\t\treturn A\nclass StyleCollection:\n\tdef __init__(A,collection):A._collection=collection\n\tdef __getitem__(A,key):return[A.style[key]for A in A._collection._elements]\n\tdef __setitem__(A,key,value):\n\t\tfor B in A._collection._elements:B.style[key]=value\n\tdef __repr__(A):return f\"StyleCollection({A._collection!r})\"\n\tdef remove(A,key):\n\t\tfor B in A._collection._elements:B.style.remove(key)\nclass ElementCollection:\n\t@classmethod\n\tdef wrap_dom_elements(A,dom_elements):return A([Element.wrap_dom_element(A)for A in dom_elements])\n\tdef __init__(A,elements):A._elements=elements;A._classes=ClassesCollection(A);A._style=StyleCollection(A)\n\tdef __eq__(A,obj):return isinstance(obj,ElementCollection)and obj._elements==A._elements\n\tdef __getitem__(B,key):\n\t\tA=key\n\t\tif isinstance(A,int):return B._elements[A]\n\t\tif isinstance(A,slice):return ElementCollection(B._elements[A])\n\t\treturn B.find(A)\n\tdef __iter__(A):yield from A._elements\n\tdef __len__(A):return len(A._elements)\n\tdef __repr__(A):return f\"{A.__class__.__name__} (length: {len(A._elements)}) {A._elements}\"\n\tdef __getattr__(A,name):return[getattr(A,name)for A in A._elements]\n\tdef __setattr__(C,name,value):\n\t\tB=value;A=name\n\t\tif A.startswith('_'):super().__setattr__(A,B)\n\t\telse:\n\t\t\tfor D in C._elements:setattr(D,A,B)\n\t@property\n\tdef classes(self):return self._classes\n\t@property\n\tdef elements(self):return self._elements\n\t@property\n\tdef style(self):return self._style\n\tdef find(B,selector):\n\t\tA=[]\n\t\tfor C in B._elements:A.extend(C.find(selector))\n\t\treturn ElementCollection(A)\nclass a(ContainerElement):0\nclass abbr(ContainerElement):0\nclass address(ContainerElement):0\nclass area(Element):0\nclass article(ContainerElement):0\nclass aside(ContainerElement):0\nclass audio(ContainerElement):0\nclass b(ContainerElement):0\nclass base(Element):0\nclass blockquote(ContainerElement):0\nclass body(ContainerElement):0\nclass br(Element):0\nclass button(ContainerElement):0\nclass canvas(ContainerElement):\n\tdef download(A,filename='snapped.png'):B=a(download=filename,href=A._dom_element.toDataURL());A.append(B);B._dom_element.click()\n\tdef draw(E,what,width=_A,height=_A):\n\t\tC=height;B=width;A=what\n\t\tif isinstance(A,Element):A=A._dom_element\n\t\tD=E._dom_element.getContext('2d')\n\t\tif B or C:D.drawImage(A,0,0,B,C)\n\t\telse:D.drawImage(A,0,0)\nclass caption(ContainerElement):0\nclass cite(ContainerElement):0\nclass code(ContainerElement):0\nclass col(Element):0\nclass colgroup(ContainerElement):0\nclass data(ContainerElement):0\nclass datalist(ContainerElement,HasOptions):0\nclass dd(ContainerElement):0\nclass del_(ContainerElement):0\nclass details(ContainerElement):0\nclass dialog(ContainerElement):0\nclass div(ContainerElement):0\nclass dl(ContainerElement):0\nclass dt(ContainerElement):0\nclass em(ContainerElement):0\nclass embed(Element):0\nclass fieldset(ContainerElement):0\nclass figcaption(ContainerElement):0\nclass figure(ContainerElement):0\nclass footer(ContainerElement):0\nclass form(ContainerElement):0\nclass h1(ContainerElement):0\nclass h2(ContainerElement):0\nclass h3(ContainerElement):0\nclass h4(ContainerElement):0\nclass h5(ContainerElement):0\nclass h6(ContainerElement):0\nclass head(ContainerElement):0\nclass header(ContainerElement):0\nclass hgroup(ContainerElement):0\nclass hr(Element):0\nclass html(ContainerElement):0\nclass i(ContainerElement):0\nclass iframe(ContainerElement):0\nclass img(Element):0\nclass input_(Element):0\nclass ins(ContainerElement):0\nclass kbd(ContainerElement):0\nclass label(ContainerElement):0\nclass legend(ContainerElement):0\nclass li(ContainerElement):0\nclass link(Element):0\nclass main(ContainerElement):0\nclass map_(ContainerElement):0\nclass mark(ContainerElement):0\nclass menu(ContainerElement):0\nclass meta(ContainerElement):0\nclass meter(ContainerElement):0\nclass nav(ContainerElement):0\nclass object_(ContainerElement):0\nclass ol(ContainerElement):0\nclass optgroup(ContainerElement,HasOptions):0\nclass option(ContainerElement):0\nclass output(ContainerElement):0\nclass p(ContainerElement):0\nclass param(ContainerElement):0\nclass picture(ContainerElement):0\nclass pre(ContainerElement):0\nclass progress(ContainerElement):0\nclass q(ContainerElement):0\nclass s(ContainerElement):0\nclass script(ContainerElement):0\nclass section(ContainerElement):0\nclass select(ContainerElement,HasOptions):0\nclass small(ContainerElement):0\nclass source(Element):0\nclass span(ContainerElement):0\nclass strong(ContainerElement):0\nclass style(ContainerElement):0\nclass sub(ContainerElement):0\nclass summary(ContainerElement):0\nclass sup(ContainerElement):0\nclass table(ContainerElement):0\nclass tbody(ContainerElement):0\nclass td(ContainerElement):0\nclass template(ContainerElement):0\nclass textarea(ContainerElement):0\nclass tfoot(ContainerElement):0\nclass th(ContainerElement):0\nclass thead(ContainerElement):0\nclass time(ContainerElement):0\nclass title(ContainerElement):0\nclass tr(ContainerElement):0\nclass track(Element):0\nclass u(ContainerElement):0\nclass ul(ContainerElement):0\nclass var(ContainerElement):0\nclass video(ContainerElement):\n\tdef snap(E,to=_A,width=_A,height=_A):\n\t\tH='CANVAS';G='Element to snap to must be a canvas.';C=height;B=width;A=to;B=B if B is not _A else E.videoWidth;C=C if C is not _A else E.videoHeight\n\t\tif is_none(A):A=canvas(width=B,height=C)\n\t\telif isinstance(A,Element):\n\t\t\tif A.tag!='canvas':D=G;raise TypeError(D)\n\t\telif getattr(A,'tagName','')==H:A=canvas(dom_element=A)\n\t\telif isinstance(A,str):\n\t\t\tF=document.querySelectorAll(A)\n\t\t\tif F.length==0:D='No element with selector {to} to snap to.';raise TypeError(D)\n\t\t\tif F[0].tagName!=H:D=G;raise TypeError(D)\n\t\t\tA=canvas(dom_element=F[0])\n\t\tA.draw(E,B,C);return A\nclass wbr(Element):0\nELEMENT_CLASSES=[a,abbr,address,area,article,aside,audio,b,base,blockquote,body,br,button,canvas,caption,cite,code,col,colgroup,data,datalist,dd,del_,details,dialog,div,dl,dt,em,embed,fieldset,figcaption,figure,footer,form,h1,h2,h3,h4,h5,h6,head,header,hgroup,hr,html,i,iframe,img,input_,ins,kbd,label,legend,li,link,main,map_,mark,menu,meta,meter,nav,object_,ol,optgroup,option,output,p,param,picture,pre,progress,q,s,script,section,select,small,source,span,strong,style,sub,summary,sup,table,tbody,td,template,textarea,tfoot,th,thead,time,title,tr,track,u,ul,var,video,wbr]\nElement.register_element_classes(ELEMENT_CLASSES)\nclass Page:\n\tdef __init__(A):A.html=Element.wrap_dom_element(document.documentElement);A.body=Element.wrap_dom_element(document.body);A.head=Element.wrap_dom_element(document.head)\n\tdef __getitem__(A,selector):return A.find(selector)\n\t@property\n\tdef title(self):return document.title\n\t@title.setter\n\tdef title(self,value):document.title=value\n\tdef append(A,*B):A.body.append(*B)\n\tdef find(A,selector):return ElementCollection.wrap_dom_elements(document.querySelectorAll(selector))\npage=Page()",
     "websocket.py": "import js\nfrom pyscript.ffi import create_proxy\nfrom pyscript.util import as_bytearray,is_awaitable\ncode='code'\nprotocols='protocols'\nreason='reason'\nmethods=['onclose','onerror','onmessage','onopen']\ndef add_listener(socket,onevent,listener):\n\tA=listener;B=create_proxy(A)\n\tif is_awaitable(A):\n\t\tasync def D(e):await B(EventMessage(e))\n\t\tC=D\n\telse:C=lambda e:B(EventMessage(e))\n\tsetattr(socket,onevent,C)\nclass EventMessage:\n\tdef __init__(A,event):A._event=event\n\tdef __getattr__(B,attr):\n\t\tA=getattr(B._event,attr)\n\t\tif attr=='data'and not isinstance(A,str):\n\t\t\tif hasattr(A,'to_py'):return A.to_py()\n\t\t\treturn memoryview(as_bytearray(A))\n\t\treturn A\nclass WebSocket:\n\tCONNECTING=0;OPEN=1;CLOSING=2;CLOSED=3\n\tdef __init__(E,**A):\n\t\tD=A['url']\n\t\tif protocols in A:B=js.WebSocket.new(D,A[protocols])\n\t\telse:B=js.WebSocket.new(D)\n\t\tB.binaryType='arraybuffer';object.__setattr__(E,'_ws',B)\n\t\tfor C in methods:\n\t\t\tif C in A:add_listener(B,C,A[C])\n\tdef __getattr__(A,attr):return getattr(A._ws,attr)\n\tdef __setattr__(B,attr,value):\n\t\tC=value;A=attr\n\t\tif A in methods:add_listener(B._ws,A,C)\n\t\telse:setattr(B._ws,A,C)\n\tdef close(B,**A):\n\t\tif code in A and reason in A:B._ws.close(A[code],A[reason])\n\t\telif code in A:B._ws.close(A[code])\n\t\telse:B._ws.close()\n\tdef send(B,data):\n\t\tA=data\n\t\tif isinstance(A,str):B._ws.send(A)\n\t\telse:\n\t\t\tC=js.Uint8Array.new(len(A))\n\t\t\tfor(D,E)in enumerate(A):C[D]=E\n\t\t\tB._ws.send(C)",
     "workers.py": "import js as _js\nfrom polyscript import workers as _workers\n_get=_js.Reflect.get\ndef _set(script,name,value=''):script.setAttribute(name,value)\nclass _ReadOnlyProxy:\n\tdef __getitem__(A,name):return _get(_workers,name)\n\tdef __getattr__(A,name):return _get(_workers,name)\nworkers=_ReadOnlyProxy()\nasync def create_named_worker(src='',name='',config=None,type='py'):\n\tC=name;B=config;from json import dumps\n\tif not src:D='Named workers require src';raise ValueError(D)\n\tif not C:D='Named workers require a name';raise ValueError(D)\n\tA=_js.document.createElement('script');A.type=type;A.src=src;_set(A,'worker');_set(A,'name',C)\n\tif B:_set(A,'config',isinstance(B,str)and B or dumps(B))\n\t_js.document.body.append(A);return await workers[C]"
   }
diff --git a/core/src/stdlib/pyscript/display.py b/core/src/stdlib/pyscript/display.py
index f7431b6b..4f1986f8 100644
--- 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)
 
diff --git a/core/src/stdlib/pyscript/ffi.py b/core/src/stdlib/pyscript/ffi.py
index 7e1d6a46..b3a97d91 100644
--- 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 +15,10 @@ 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
diff --git a/core/src/stdlib/pyscript/storage.py b/core/src/stdlib/pyscript/storage.py
index 4fa5c06b..7600d602 100644
--- 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])
diff --git a/core/src/stdlib/pyscript/web.py b/core/src/stdlib/pyscript/web.py
index d2bd7206..a218cf5a 100644
--- 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.
@@ -195,7 +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)
@@ -1134,7 +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):
diff --git a/core/types/core.d.ts b/core/types/core.d.ts
index 2f075d55..8b47ce7f 100644
--- 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 };