Fix expandable block anchor resolution (GitbookIO#2625)

Author: gregberge

.changeset/beige-falcons-enjoy.md

@@ -0,0 +1,5 @@
+---
+'gitbook': patch
+---
+
+Fix expandable block anchore resolution

packages/gitbook/src/lib/document.test.ts

@@ -1,6 +1,6 @@
 import { describe, expect, it } from 'bun:test';
 
-import { isNodeEmpty } from './document';
+import { getBlockTitle, isNodeEmpty } from './document';
 
 describe('isNodeEmpty', () => {
  it('should return true for a document with an empty paragraph', () => {
@@ -54,3 +54,76 @@ describe('isNodeEmpty', () => {
  ).toEqual(false);
  });
 });
+
+describe('#getBlockTitle', () => {
+ it('should return the title of an expandable block', () => {
+ expect(
+ getBlockTitle({
+ object: 'block',
+ type: 'expandable',
+ isVoid: true,
+ data: {},
+ key: 'OX8znB9VmbgK',
+ fragments: [
+ {
+ object: 'fragment',
+ nodes: [
+ {
+ object: 'block',
+ type: 'paragraph',
+ isVoid: false,
+ data: {},
+ nodes: [
+ {
+ object: 'text',
+ leaves: [
+ {
+ object: 'leaf',
+ text: 'Title of expandable block',
+ marks: [],
+ },
+ ],
+ key: '7sZdCBHTw6Si',
+ },
+ ],
+ key: 'msYtjdwNmiAB',
+ },
+ ],
+ key: 'cNhmBygbrP8N',
+ fragment: 'expandable-title',
+ type: 'expandable-title',
+ },
+ {
+ object: 'fragment',
+ nodes: [
+ {
+ object: 'block',
+ type: 'paragraph',
+ isVoid: false,
+ data: {},
+ nodes: [
+ {
+ object: 'text',
+ leaves: [
+ {
+ object: 'leaf',
+ text: 'And content of the expandable',
+ marks: [],
+ },
+ ],
+ key: '0GEghVKyWRBt',
+ },
+ ],
+ key: '9iEwdHdZ5y0S',
+ },
+ ],
+ key: 'newg71i9Ujjl',
+ fragment: 'expandable-body',
+ type: 'expandable-body',
+ },
+ ],
+ meta: { id: 'expandable-block' },
+ }),
+ ).toEqual('Title of expandable block');
+ });
+});

packages/gitbook/src/lib/document.ts

@@ -154,7 +154,7 @@ export function isNodeEmpty(
 export function getBlockTitle(block: DocumentBlock): string {
  switch (block.type) {
  case 'expandable': {
- const titleFragment = getNodeFragmentByType(block, 'title');
+ const titleFragment = getNodeFragmentByType(block, 'expandable-title');
  if (titleFragment) {
  return getNodeText(titleFragment);
  }