stream: add writableCorked property

PR-URL: https://github.com/nodejs/node/pull/29012
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>

1 files changed, 10 insertions, 0 deletions

diff --git a/lib/_stream_writable.js b/lib/_stream_writable.js
index 9b75b672cb..9b4036e476 100644
--- a/lib/_stream_writable.js
+++ b/lib/_stream_writable.js
@@ -385,6 +385,16 @@ Object.defineProperty(Writable.prototype, 'writableHighWaterMark', {
   }
 });
 
+Object.defineProperty(Writable.prototype, 'writableCorked', {
+  // Making it explicit this property is not enumerable
+  // because otherwise some prototype manipulation in
+  // userland will fail
+  enumerable: false,
+  get: function() {
+    return this._writableState ? this._writableState.corked : 0;
+  }
+});
+
 // If we're already writing something, then just put this
 // in the queue, and wait our turn.  Otherwise, call _write
 // If we return false, then we need a drain event, so set that flag.