feat: Support search when there is no title (#1519)

* feat: Support search when there is no title
* test: Support search when there is no title

src/plugins/search/search.js

@@ -85,7 +85,7 @@ export function genIndex(path, content = '', router, depth) {
   let slug;
   let title = '';
 
-  tokens.forEach(token => {
+  tokens.forEach(function(token, tokenIndex) {
     if (token.type === 'heading' && token.depth <= depth) {
       const { str, config } = getAndRemoveConfig(token.text);
 
@@ -106,6 +106,15 @@ export function genIndex(path, content = '', router, depth) {
 
       index[slug] = { slug, title: title, body: '' };
     } else {
+      if (tokenIndex === 0) {
+        slug = router.toURL(path);
+        index[slug] = {
+          slug,
+          title: path !== '/' ? path.slice(1) : 'Home Page',
+          body: token.text || '',
+        };
+      }
+
       if (!slug) {
         return;
       }

test/e2e/search.test.js

@@ -124,4 +124,36 @@ describe('Search Plugin Tests', function() {
     await page.fill('input[type=search]', 'estáticos');
     await expect(page).toEqualText('.results-panel h2', 'Que es');
   });
+
+  test('search when there is no title', async () => {
+    const docsifyInitConfig = {
+      markdown: {
+        homepage: `
+          This is some description. We assume autoHeader added the # Title. A long paragraph.
+        `,
+        sidebar: `
+          - [Changelog](changelog)
+        `,
+      },
+      routes: {
+        '/changelog.md': `
+          feat: Support search when there is no title
+
+          ## Changelog Title
+
+          hello, this is a changelog
+        `,
+      },
+      scriptURLs: ['/lib/plugins/search.min.js'],
+    };
+    await docsifyInit(docsifyInitConfig);
+    await page.fill('input[type=search]', 'paragraph');
+    await expect(page).toEqualText('.results-panel h2', 'Home Page');
+    await page.click('.clear-button');
+    await page.fill('input[type=search]', 'Support');
+    await expect(page).toEqualText('.results-panel h2', 'changelog');
+    await page.click('.clear-button');
+    await page.fill('input[type=search]', 'hello');
+    await expect(page).toEqualText('.results-panel h2', 'Changelog Title');
+  });
 });