diff --git a/docs/.vuepress/markdown/inject-json-to-md.js b/docs/.vuepress/markdown/inject-json-to-md.js
index e45021dac9e77a8ef535f3b539410a223fc182bb..cae3c6ad9e2a2d21e3305e652f55767d4cbc3a2b 100644
--- a/docs/.vuepress/markdown/inject-json-to-md.js
+++ b/docs/.vuepress/markdown/inject-json-to-md.js
@@ -166,7 +166,7 @@ module.exports = md => {
               if (!temp) return false
               temp = temp[key]
             })
-            if (!temp) continue
+            if (typeof temp === 'undefined') continue
             lines[index] = temp
           }
         }