diff --git a/examples/blog-starter-typescript/lib/api.ts b/examples/blog-starter-typescript/lib/api.ts
index cf3be86f0b0f8..be2edfd854e78 100644
--- a/examples/blog-starter-typescript/lib/api.ts
+++ b/examples/blog-starter-typescript/lib/api.ts
@@ -29,7 +29,7 @@ export function getPostBySlug(slug: string, fields: string[] = []) {
       items[field] = content
     }
 
-    if (data[field]) {
+    if (typeof data[field] !== 'undefined') {
       items[field] = data[field]
     }
   })
diff --git a/examples/blog-starter/lib/api.js b/examples/blog-starter/lib/api.js
index 08da07eb78ab8..b9612a8ac5366 100644
--- a/examples/blog-starter/lib/api.js
+++ b/examples/blog-starter/lib/api.js
@@ -25,7 +25,7 @@ export function getPostBySlug(slug, fields = []) {
       items[field] = content
     }
 
-    if (data[field]) {
+    if (typeof data[field] !== 'undefined') {
       items[field] = data[field]
     }
   })
diff --git a/examples/blog-with-comment/lib/getPost.js b/examples/blog-with-comment/lib/getPost.js
index 08da07eb78ab8..b9612a8ac5366 100644
--- a/examples/blog-with-comment/lib/getPost.js
+++ b/examples/blog-with-comment/lib/getPost.js
@@ -25,7 +25,7 @@ export function getPostBySlug(slug, fields = []) {
       items[field] = content
     }
 
-    if (data[field]) {
+    if (typeof data[field] !== 'undefined') {
       items[field] = data[field]
     }
   })