fixup! stream: rename Duplex.toWeb() type option to readableType

nodejs-github-bot · Feb 11, 2026 · Feb 2, 2026 · Feb 8, 2026 · Feb 8, 2026 · c16967ae5fc69e0f7cbb3efce052fd27fc4dfd7b
commit c16967ae5fc69e0f7cbb3efce052fd27fc4dfd7b
diff --git a/doc/api/deprecations.md b/doc/api/deprecations.md
@@ -4388,6 +4388,21 @@ import { opendir } from 'node:fs/promises';
 }
 ```
 
+### DEP0201: Passing `options.type` to `Duplex.toWeb()`
+
+<!-- YAML
+changes:
+  - version: REPLACEME
+    pr-url: https://github.com/nodejs/node/pull/61632
+    description: Documentation-only deprecation.
+-->
+
+Type: Documentation-only
+
+Passing the `type` option to [`Duplex.toWeb()`][] is deprecated. To specify the
+type of the readable half of the constructed readable-writable pair, use the
+`readableType` option instead.
+
 [DEP0142]: #dep0142-repl_builtinlibs
 [NIST SP 800-38D]: https://nvlpubs.nist.gov/nistpubs/Legacy/SP/nistspecialpublication800-38d.pdf
 [RFC 6066]: https://tools.ietf.org/html/rfc6066#section-3
@@ -4406,6 +4421,7 @@ import { opendir } from 'node:fs/promises';
 [`Buffer.isBuffer()`]: buffer.md#static-method-bufferisbufferobj
 [`Cipheriv`]: crypto.md#class-cipheriv
 [`Decipheriv`]: crypto.md#class-decipheriv
+[`Duplex.toWeb()`]: stream.md#streamduplextowebstreamduplex-options
 [`Error.isError`]: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Error/isError
 [`REPLServer.clearBufferedCommand()`]: repl.md#replserverclearbufferedcommand
 [`ReadStream.open()`]: fs.md#class-fsreadstream

diff --git a/doc/api/stream.md b/doc/api/stream.md
@@ -3401,7 +3401,8 @@ added: v17.0.0
 changes:
   - version: REPLACEME
     pr-url: https://github.com/nodejs/node/pull/61632
-    description: The 'type' option is renamed to 'readableType'.
+    description: Added the 'readableType' option to specify the ReadableStream
+                 type. The 'type' option is deprecated.
   - version: v25.4.0
     pr-url: https://github.com/nodejs/node/pull/58664
     description: Added the 'type' option to specify the ReadableStream type.
@@ -3416,6 +3417,7 @@ changes:
 * `options` {Object}
   * `readableType` {string} Specifies the type of the `ReadableStream` half of
     the created readable-writable pair. Must be `'bytes'` or undefined.
+    (`options.type` is a deprecated alias for this option.)
 * Returns: {Object}
   * `readable` {ReadableStream}
   * `writable` {WritableStream}

diff --git a/lib/internal/webstreams/adapters.js b/lib/internal/webstreams/adapters.js
@@ -643,7 +643,7 @@ function newReadableWritablePairFromDuplex(duplex, options = kEmptyObject) {
 
   const readableOptions = {
     __proto__: null,
-    // 'options.type' is a legacy alias for 'options.readableType'
+    // DEP0201: 'options.type' is a deprecated alias for 'options.readableType'
     type: options.readableType ?? options.type,
   };