doc: update fs flags documentation

PR-URL: nodejs#48463 Fixes: nodejs#48452 Reviewed-By: Antoine du Hamel <duhamelantoine1995@gmail.com> Reviewed-By: LiviaMedeiros <livia@cirno.name> Reviewed-By: Luigi Pinca <luigipinca@gmail.com> Reviewed-By: Mestery <mestery@protonmail.com> Reviewed-By: Mohammed Keyvanzadeh <mohammadkeyvanzade94@gmail.com>
Ceres6 · Aug 14, 2023 · 2d86851 · 2d86851
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commit 2d86851
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/doc/api/fs.md b/doc/api/fs.md
@@ -7973,6 +7973,9 @@ string.
 * `'r'`: Open file for reading.
   An exception occurs if the file does not exist.
 
+* `'rs'`: Open file for reading in synchronous mode.
+  An exception occurs if the file does not exist.
+
 * `'r+'`: Open file for reading and writing.
   An exception occurs if the file does not exist.