doc: add more info for timer.setInterval

PR-URL: nodejs#45232 Refs: nodejs#45224 Reviewed-By: Benjamin Gruenbaum <benjamingr@gmail.com>
lucshi · Nov 9, 2022 · 6b5a40e · 6b5a40e
1 parent dca9733
commit 6b5a40e
Showing 1 changed file with 2 additions and 0 deletions.
diff --git a/doc/api/timers.md b/doc/api/timers.md
@@ -442,6 +442,8 @@ added: v15.9.0
 -->
 
 Returns an async iterator that generates values in an interval of `delay` ms.
+If `ref` is `true`, you need to call `next()` of async iterator explicitly
+or implicitly to keep the event loop alive.
 
 * `delay` {number} The number of milliseconds to wait between iterations.
   **Default:** `1`.