stream: use readableObjectMode public api for js stream

PR-URL: https://github.com/nodejs/node/pull/27655
Refs: https://github.com/nodejs/node/issues/445
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Yongsheng Zhang <zyszys98@gmail.com>

1 files changed, 7 insertions, 0 deletions

diff --git a/lib/_stream_readable.js b/lib/_stream_readable.js
index 5f7f10420e..5905c56bd4 100644
--- a/lib/_stream_readable.js
+++ b/lib/_stream_readable.js
@@ -1081,6 +1081,13 @@ Object.defineProperty(Readable.prototype, 'readableLength', {
   }
 });
 
+Object.defineProperty(Readable.prototype, 'readableObjectMode', {
+  enumerable: false,
+  get() {
+    return this._readableState ? this._readableState.objectMode : false;
+  }
+});
+
 // Pluck off n bytes from an array of buffers.
 // Length is the combined lengths of all the buffers in the list.
 // This function is designed to be inlinable, so please take care when making