From 3657492c528a54fc2d16d1596818d7eb75f18fc0 Mon Sep 17 00:00:00 2001
From: Andrea Giammarchi <andrea.giammarchi@gmail.com>
Date: Fri, 12 Sep 2025 09:40:23 +0200
Subject: [PATCH] Simplify even further the bridge with a fallback (#2379)

---
 bridge/index.js        | 18 ++++++++++++++++++
 bridge/package.json    |  2 +-
 bridge/test/index.html |  2 --
 3 files changed, 19 insertions(+), 3 deletions(-)

diff --git a/bridge/index.js b/bridge/index.js
index 2c4776e4..a65afb60 100644
--- a/bridge/index.js
+++ b/bridge/index.js
@@ -131,6 +131,24 @@ export default (url, {
                 // return a promise that will resolve only once the event
                 // has been emitted and the interpreter evaluated the code
                 const { promise, resolve } = Promise.withResolvers();
+
+                // ⚠️ This is just a *fallback* !!!
+                //     Please always use an explicit PyScript release !!!
+                if (!(Symbol.for('@pyscript/core') in globalThis)) {
+                  // bring in PyScript via the `npm` developers' channel
+                  const cdn = 'https://cdn.jsdelivr.net/npm/@pyscript/core/dist';
+                  document.head.appendChild(
+                    Object.assign(
+                      document.createElement('link'),
+                      {
+                        rel: 'stylesheet',
+                        href: `${cdn}/core.css`,
+                      }
+                    )
+                  );
+                  try { await import(`${cdn}/core.js`) }
+                  catch {}
+                }
                 return promise;
               });
             }
diff --git a/bridge/package.json b/bridge/package.json
index 1bf49234..f3bbaf1b 100644
--- a/bridge/package.json
+++ b/bridge/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@pyscript/bridge",
-  "version": "0.1.0",
+  "version": "0.2.0",
   "description": "A JS based way to use PyScript modules",
   "type": "module",
   "module": "./index.js",
diff --git a/bridge/test/index.html b/bridge/test/index.html
index 7ee05f2d..382d5362 100644
--- a/bridge/test/index.html
+++ b/bridge/test/index.html
@@ -5,8 +5,6 @@
         <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">