diff --git a/docs/demo/index.js b/docs/demo/index.js
index 0e4a87dba..90e501596 100644
--- a/docs/demo/index.js
+++ b/docs/demo/index.js
@@ -1,3 +1,6 @@
 import dayjs from 'dayjs'
 // basic usage
 dayjs().format()
+
+// parse
+dayjs('2018-08-08').format()