fix(content-docs): sidebar generator should return customProps for doc items (#9107)

packages/docusaurus-plugin-content-docs/src/sidebars/__tests__/__snapshots__/generator.test.ts.snap

@@ -86,6 +86,9 @@ exports[`DefaultSidebarItemsGenerator generates simple flat sidebar 1`] = `
     "type": "doc",
   },
   {
+    "customProps": {
+      "custom": "prop",
+    },
     "id": "doc1",
     "label": "doc1 sidebar label",
     "type": "doc",

packages/docusaurus-plugin-content-docs/src/sidebars/__tests__/generator.test.ts

@@ -64,6 +64,7 @@ describe('DefaultSidebarItemsGenerator', () => {
           sidebarPosition: 2,
           frontMatter: {
             sidebar_label: 'doc1 sidebar label',
+            sidebar_custom_props: {custom: 'prop'},
           },
           title: '',
           unversionedId: 'doc1',

packages/docusaurus-plugin-content-docs/src/sidebars/generator.ts

@@ -138,7 +138,11 @@ Available doc IDs:
     ): WithPosition<SidebarItemDoc> {
       const {
         sidebarPosition: position,
-        frontMatter: {sidebar_label: label, sidebar_class_name: className},
+        frontMatter: {
+          sidebar_label: label,
+          sidebar_class_name: className,
+          sidebar_custom_props: customProps,
+        },
       } = getDoc(id);
       return {
         type: 'doc',
@@ -149,6 +153,7 @@ Available doc IDs:
         // sidebar
         ...(label !== undefined && {label}),
         ...(className !== undefined && {className}),
+        ...(customProps !== undefined && {customProps}),
       };
     }
     function createCategoryItem(