fix: fix search with no content. (#1878)

Author: Koooooo-7

src/plugins/search/search.js

@@ -211,14 +211,15 @@ export function search(query) {
           }
 
           const matchContent =
+            handlePostContent &&
             '...' +
-            handlePostContent
-              .substring(start, end)
-              .replace(
-                regEx,
-                word => `<em class="search-keyword">${word}</em>`
-              ) +
-            '...';
+              handlePostContent
+                .substring(start, end)
+                .replace(
+                  regEx,
+                  word => `<em class="search-keyword">${word}</em>`
+                ) +
+              '...';
 
           resultStr += matchContent;
         }

test/e2e/search.test.js

@@ -176,4 +176,24 @@ test.describe('Search Plugin Tests', () => {
     await searchFieldElm.fill('hello');
     await expect(resultsHeadingElm).toHaveText('Changelog Title');
   });
+  test('search when there is no body', async ({ page }) => {
+    const docsifyInitConfig = {
+      markdown: {
+        homepage: `
+          # EmptyContent
+          ---
+          ---
+        `,
+      },
+      scriptURLs: ['/lib/plugins/search.min.js'],
+    };
+
+    const searchFieldElm = page.locator('input[type=search]');
+    const resultsHeadingElm = page.locator('.results-panel h2');
+
+    await docsifyInit(docsifyInitConfig);
+
+    await searchFieldElm.fill('empty');
+    await expect(resultsHeadingElm).toHaveText('EmptyContent');
+  });
 });