Core: Fix failed to update page tree from loader()

.changeset/six-birds-relate.md

@@ -0,0 +1,5 @@
+---
+'fumadocs-core': patch
+---
+
+Fix failed to update page tree from `loader()`

apps/docs/mdx-components.tsx

@@ -5,7 +5,7 @@ import type { MDXComponents } from 'mdx/types';
 import { Accordion, Accordions } from 'fumadocs-ui/components/accordion';
 import * as icons from 'lucide-react';
 
-export function getMDXComponents(components?: MDXComponents): MDXComponents {
+export function getMDXComponents(components?: MDXComponents) {
   return {
     ...(icons as unknown as MDXComponents),
     ...defaultMdxComponents,
@@ -14,5 +14,20 @@ export function getMDXComponents(components?: MDXComponents): MDXComponents {
     Accordion,
     Accordions,
     ...components,
-  };
+  } satisfies MDXComponents;
+}
+
+declare module 'mdx/types.js' {
+  // Augment the MDX types to make it understand React.
+  // eslint-disable-next-line @typescript-eslint/no-namespace
+  namespace JSX {
+    type Element = React.JSX.Element;
+    type ElementClass = React.JSX.ElementClass;
+    type ElementType = React.JSX.ElementType;
+    type IntrinsicElements = React.JSX.IntrinsicElements;
+  }
+}
+
+declare global {
+  type MDXProvidedComponents = ReturnType<typeof getMDXComponents>;
 }

apps/docs/tsconfig.json

@@ -8,6 +8,7 @@
   "include": [
     "next-env.d.ts",
     "**/*.ts",
+    "content/**/*.mdx",
     "**/*.mts",
     "**/*.tsx",
     ".next/types/**/*.ts",

packages/core/src/source/loader.ts

@@ -367,7 +367,7 @@ function createOutput(options: LoaderOptions): LoaderOutput<LoaderConfig> {
         pageTree = v as unknown as Record<string, PageTree.Root>;
       } else {
         pageTree = {
-          defaultLanguage: v,
+          [defaultLanguage]: v,
         };
       }
     },