Implemented PR feedback

Author: matthewlipski

packages/core/src/blocks/Code/block.ts

@@ -40,8 +40,6 @@ export const createCodeBlockSpec = createBlockSpec(
         options.supportedLanguages && {
           selectedLanguage: block.props.language,
           supportedLanguages: options.supportedLanguages,
-          createPreview:
-            options.supportedLanguages[block.props.language].createPreview,
         },
       ),
     toExternalHTML: (block) => createPreCode(block),

packages/core/src/blocks/Code/helpers/render/createSourceBlock.ts

@@ -27,6 +27,10 @@ export const createLanguageSelect = (
   select.value = selectedLanguage;
 
   const handleLanguageChange = (event: Event) => {
+    if (!editor.isEditable) {
+      return;
+    }
+
     editor.updateBlock(block.id, {
       props: { language: (event.target as HTMLSelectElement).value },
     });

packages/core/src/blocks/Code/helpers/render/createSourceBlockWithPreview.ts

@@ -252,6 +252,14 @@ export const createSourceBlockWithPreview = (
         createPreview: CodeBlockPreview;
       },
 ) => {
+  if (
+    options &&
+    "selectedLanguage" in options &&
+    !(options.selectedLanguage in options.supportedLanguages)
+  ) {
+    throw new Error(`Language ${options.selectedLanguage} is not supported.`);
+  }
+
   const sourceBlock = createSourceBlock(
     block,
     editor,

packages/math-block/src/helpers/getMathSource.ts

@@ -7,7 +7,9 @@ export const getMathSource = (block: { content: unknown }): string => {
   }
   if (Array.isArray(block.content)) {
     return block.content
-      .map((node) => ("text" in node ? node.text : ""))
+      .map((node) =>
+        node && typeof node === "object" && "text" in node ? node.text : "",
+      )
       .join("");
   }
   return "";