attempt 4

Author: Archmonger

src/js/packages/@reactpy/client/src/bind.tsx

@@ -37,13 +37,25 @@ function reactjs_bind(node: HTMLElement, React: any, ReactDOM: any) {
       React.createElement(type, props, ...(children || [])),
     render: (element: any) => {
       if (!root) {
+        // @ts-ignore
+        if (node._reactPyRoot) {
+          // @ts-ignore
+          node._reactPyRoot.unmount();
+        }
         root = ReactDOM.createRoot(node);
+        // @ts-ignore
+        node._reactPyRoot = root;
       }
       root.render(element);
     },
     unmount: () => {
       if (root) {
         root.unmount();
+        // @ts-ignore
+        if (node._reactPyRoot === root) {
+          // @ts-ignore
+          node._reactPyRoot = null;
+        }
         root = null;
       }
     },

src/reactpy/reactjs/module.py

@@ -204,11 +204,11 @@ def import_reactjs(
     """
     from reactpy import html
 
-    if use_local and (framework or version):
+    if use_local and (framework or version):  # nocov
         raise ValueError("use_local cannot be used with framework or version")
 
     framework = framework or "preact"
-    if framework and framework not in {"preact", "react"}:
+    if framework and framework not in {"preact", "react"}:  # nocov
         raise ValueError("framework must be 'preact' or 'react'")
 
     # Import map for ReactPy's local framework (re-exported/bundled/minified version of Preact)