Add shim to keep working with value instead of initialValue

packages/volto-slate/src/slate-react.js

@@ -0,0 +1,26 @@
+import { Slate as OrigSlate } from '@slate-react';
+
+// Components
+export { Editable, DefaultPlaceholder } from '@slate-react';
+
+export { DefaultElement } from '@slate-react';
+export { DefaultLeaf } from '@slate-react';
+
+// Hooks
+export { useEditor } from '@slate-react';
+export { useSlateStatic } from '@slate-react';
+export { useFocused } from '@slate-react';
+export { useReadOnly } from '@slate-react';
+export { useSelected } from '@slate-react';
+export { useSlate, useSlateWithV } from '@slate-react';
+export { useSlateSelector } from '@slate-react';
+export { useSlateSelection } from '@slate-react';
+
+// Plugin
+export { ReactEditor } from '@slate-react';
+export { withReact } from '@slate-react';
+
+export const Slate = (props) => {
+  const initialValue = props.initialValue || props.value;
+  return OrigSlate({ ...props, initialValue });
+};

razzle.config.js

@@ -242,6 +242,9 @@ const defaultModify = ({
     // avoids including lodash multiple times.
     // semantic-ui-react uses lodash-es, everything else uses lodash
     'lodash-es': path.dirname(require.resolve('lodash')),
+    // workaround for backwards-incompatible change in slate-react
+    '@slate-react': path.dirname(require.resolve('slate-react')),
+    'slate-react$': `${registry.voltoPath}/packages/volto-slate/src/slate-react`,
   };
 
   const [addonsThemeLoaderVariablesPath, addonsThemeLoaderMainPath] =