adamlaska · pull · Feb 27, 2026 · Feb 27, 2026 · Feb 27, 2026 · Feb 27, 2026
diff --git a/benchmark/fixtures/transform-types-benchmark.js b/benchmark/fixtures/transform-types-benchmark.js
diff --git a/benchmark/fixtures/transform-types-benchmark.ts b/benchmark/fixtures/transform-types-benchmark.ts
diff --git a/benchmark/ts/transform-typescript.js b/benchmark/ts/transform-typescript.js
diff --git a/doc/api/cli.md b/doc/api/cli.md
@@ -1315,17 +1315,6 @@ Enable module mocking in the test runner.
 
 This feature requires `--allow-worker` if used with the [Permission Model][].
 
-### `--experimental-transform-types`
-
-<!-- YAML
-added: v22.7.0
--->
-
-> Stability: 1.2 - Release candidate
-
-Enables the transformation of TypeScript-only syntax into JavaScript code.
-Implies `--enable-source-maps`.
-
 ### `--experimental-vm-modules`
 
 <!-- YAML
@@ -3621,7 +3610,6 @@ one is included in the list below.
 * `--experimental-specifier-resolution`
 * `--experimental-test-isolation`
 * `--experimental-top-level-await`
-* `--experimental-transform-types`
 * `--experimental-vm-modules`
 * `--experimental-wasi-unstable-preview1`
 * `--force-context-aware`

diff --git a/doc/api/module.md b/doc/api/module.md
@@ -245,6 +245,10 @@
 added:
   - v23.2.0
   - v22.13.0
+changes:
+  - version: REPLACEME
+    pr-url: https://github.com/nodejs/node/pull/61803
+    description: Removed `transform` and `sourceMap` options.
 -->
 
 > Stability: 1.2 - Release candidate
@@ -253,9 +257,6 @@
 * `options` {Object}
   * `mode` {string} **Default:** `'strip'`. Possible values are:
     * `'strip'` Only strip type annotations without performing the transformation of TypeScript features.
-    * `'transform'` Strip type annotations and transform TypeScript features to JavaScript.
-  * `sourceMap` {boolean} **Default:** `false`. Only when `mode` is `'transform'`, if `true`, a source map
-    will be generated for the transformed code.
   * `sourceUrl` {string}  Specifies the source url used in the source map.
 * Returns: {string} The code with type annotations stripped.
   `module.stripTypeScriptTypes()` removes type annotations from TypeScript code. It
@@ -264,10 +265,6 @@
   By default, it will throw an error if the code contains TypeScript features
   that require transformation such as `Enums`,
   see [type-stripping][] for more information.
-  When mode is `'transform'`, it also transforms TypeScript features to JavaScript,
-  see [transform TypeScript features][] for more information.
-  When mode is `'strip'`, source maps are not generated, because locations are preserved.
-  If `sourceMap` is provided, when mode is `'strip'`, an error will be thrown.
 
 _WARNING_: The output of this function should not be considered stable across Node.js versions,
 due to changes in the TypeScript parser.
@@ -306,40 +303,6 @@
 // Prints: const a         = 1\n\n//# sourceURL=source.ts;
 ```
 
-When `mode` is `'transform'`, the code is transformed to JavaScript:
-
-```mjs
-import { stripTypeScriptTypes } from 'node:module';
-const code = `
-  namespace MathUtil {
-    export const add = (a: number, b: number) => a + b;
-  }`;
-const strippedCode = stripTypeScriptTypes(code, { mode: 'transform', sourceMap: true });
-console.log(strippedCode);
-// Prints:
-// var MathUtil;
-// (function(MathUtil) {
-//     MathUtil.add = (a, b)=>a + b;
-// })(MathUtil || (MathUtil = {}));
-// # sourceMappingURL=data:application/json;base64, ...
-```
-
-```cjs
-const { stripTypeScriptTypes } = require('node:module');
-const code = `
-  namespace MathUtil {
-    export const add = (a: number, b: number) => a + b;
-  }`;
-const strippedCode = stripTypeScriptTypes(code, { mode: 'transform', sourceMap: true });
-console.log(strippedCode);
-// Prints:
-// var MathUtil;
-// (function(MathUtil) {
-//     MathUtil.add = (a, b)=>a + b;
-// })(MathUtil || (MathUtil = {}));
-// # sourceMappingURL=data:application/json;base64, ...
-```
-
 ### `module.syncBuiltinESMExports()`
 
 <!-- YAML
@@ -2041,5 +2004,4 @@
 [synchronous hook functions]: #hook-functions-accepted-by-moduleregisterhooks
 [the documentation of `Worker`]: worker_threads.md#new-workerfilename-options
 [transferable objects]: worker_threads.md#portpostmessagevalue-transferlist
-[transform TypeScript features]: typescript.md#typescript-features
 [type-stripping]: typescript.md#type-stripping
diff --git a/doc/api/process.md b/doc/api/process.md
@@ -2002,6 +2002,9 @@
  - v23.0.0
  - v22.10.0
 changes:
+  - version: REPLACEME
+    pr-url: https://github.com/nodejs/node/pull/61803
+    description: Removed `transform` value.
   - version:
       - v25.2.0
       - v24.12.0
@@ -2013,8 +2016,7 @@
 
 * Type: {boolean|string}
 
-A value that is `"strip"` by default,
-`"transform"` if Node.js is run with `--experimental-transform-types`, and `false` if
+A value that is `"strip"` by default, and `false` if
 Node.js is run with `--no-strip-types`.
 
 ## `process.features.uv`

diff --git a/doc/api/sqlite.md b/doc/api/sqlite.md
@@ -163,6 +163,23 @@ changes:
     language features that allow ordinary SQL to deliberately corrupt the database file are disabled.
     The defensive flag can also be set using `enableDefensive()`.
     **Default:** `true`.
+  * `limits` {Object} Configuration for various SQLite limits. These limits
+    can be used to prevent excessive resource consumption when handling
+    potentially malicious input. See [Run-Time Limits][] and [Limit Constants][]
+    in the SQLite documentation for details. Default values are determined by
+    SQLite's compile-time defaults and may vary depending on how SQLite was
+    built. The following properties are supported:
+    * `length` {number} Maximum length of a string or BLOB.
+    * `sqlLength` {number} Maximum length of an SQL statement.
+    * `column` {number} Maximum number of columns.
+    * `exprDepth` {number} Maximum depth of an expression tree.
+    * `compoundSelect` {number} Maximum number of terms in a compound SELECT.
+    * `vdbeOp` {number} Maximum number of VDBE instructions.
+    * `functionArg` {number} Maximum number of function arguments.
+    * `attach` {number} Maximum number of attached databases.
+    * `likePatternLength` {number} Maximum length of a LIKE pattern.
+    * `variableNumber` {number} Maximum number of SQL variables.
+    * `triggerDepth` {number} Maximum trigger recursion depth.
 
 Constructs a new `DatabaseSync` instance.
 
@@ -451,6 +468,36 @@ added:
 * Type: {boolean} Whether the database is currently within a transaction. This method
   is a wrapper around [`sqlite3_get_autocommit()`][].
 
+### `database.limits`
+
+<!-- YAML
+added: REPLACEME
+-->
+
+* Type: {Object}
+
+An object for getting and setting SQLite database limits at runtime.
+Each property corresponds to an SQLite limit and can be read or written.
+
+```js
+const db = new DatabaseSync(':memory:');
+
+// Read current limit
+console.log(db.limits.length);
+
+// Set a new limit
+db.limits.sqlLength = 100000;
+
+// Reset a limit to its compile-time maximum
+db.limits.sqlLength = Infinity;
+```
+
+Available properties: `length`, `sqlLength`, `column`, `exprDepth`,
+`compoundSelect`, `vdbeOp`, `functionArg`, `attach`, `likePatternLength`,
+`variableNumber`, `triggerDepth`.
+
+Setting a property to `Infinity` resets the limit to its compile-time maximum value.
+
 ### `database.open()`
 
 <!-- YAML
@@ -1478,6 +1525,8 @@ callback function to indicate what type of operation is being authorized.
 [Changesets and Patchsets]: https://www.sqlite.org/sessionintro.html#changesets_and_patchsets
 [Constants Passed To The Conflict Handler]: https://www.sqlite.org/session/c_changeset_conflict.html
 [Constants Returned From The Conflict Handler]: https://www.sqlite.org/session/c_changeset_abort.html
+[Limit Constants]: https://www.sqlite.org/c3ref/c_limit_attached.html
+[Run-Time Limits]: https://www.sqlite.org/c3ref/limit.html
 [SQL injection]: https://en.wikipedia.org/wiki/SQL_injection
 [Type conversion between JavaScript and SQLite]: #type-conversion-between-javascript-and-sqlite
 [`ATTACH DATABASE`]: https://www.sqlite.org/lang_attach.html

diff --git a/doc/api/typescript.md b/doc/api/typescript.md
@@ -2,6 +2,9 @@
 
 <!-- YAML
 changes:
+  - version: REPLACEME
+    pr-url: https://github.com/nodejs/node/pull/61803
+    description: Removed `--experimental-transform-types` flag.
   - version:
       - v25.2.0
       - v24.12.0
@@ -77,8 +80,6 @@
 erasable TypeScript syntax.
 Node.js will replace TypeScript syntax with whitespace,
 and no type checking is performed.
-To enable the transformation of non erasable TypeScript syntax, which requires JavaScript code generation,
-such as `enum` declarations, parameter properties use the flag [`--experimental-transform-types`][].
 To disable this feature, use the flag [`--no-strip-types`][].
 
 Node.js ignores `tsconfig.json` files and therefore
@@ -139,8 +140,7 @@
 ### TypeScript features
 
 Since Node.js is only removing inline types, any TypeScript features that
-involve _replacing_ TypeScript syntax with new JavaScript syntax will error,
-unless the flag [`--experimental-transform-types`][] is passed.
+involve _replacing_ TypeScript syntax with new JavaScript syntax will error.
 
 The most prominent features that require transformation are:
 
@@ -210,8 +210,6 @@
 
 Since inline types are replaced by whitespace, source maps are unnecessary for
 correct line numbers in stack traces; and Node.js does not generate them.
-When [`--experimental-transform-types`][] is enabled, source-maps
-are enabled by default.
 
 ### Type stripping in dependencies
 
@@ -228,7 +226,6 @@
 [CommonJS]: modules.md
 [ES Modules]: esm.md
 [Full TypeScript support]: #full-typescript-support
-[`--experimental-transform-types`]: cli.md#--experimental-transform-types
 [`--no-strip-types`]: cli.md#--no-strip-types
 [`ERR_UNSUPPORTED_TYPESCRIPT_SYNTAX`]: errors.md#err_unsupported_typescript_syntax
 [`tsconfig` "paths"]: https://www.typescriptlang.org/tsconfig/#paths

diff --git a/doc/api/util.md b/doc/api/util.md
@@ -679,8 +679,7 @@ anotherFunction();
 
 It is possible to reconstruct the original locations by setting the option `sourceMap` to `true`.
 If the source map is not available, the original location will be the same as the current location.
-When the `--enable-source-maps` flag is enabled, for example when using `--experimental-transform-types`,
-`sourceMap` will be true by default.
+When the `--enable-source-maps` flag is enabled,`sourceMap` will be true by default.
 
 ```ts
 import { getCallSites } from 'node:util';

diff --git a/doc/node-config-schema.json b/doc/node-config-schema.json
@@ -213,10 +213,6 @@
           "type": "boolean",
           "description": "experimental node:sqlite module"
         },
-        "experimental-transform-types": {
-          "type": "boolean",
-          "description": "enable transformation of TypeScript-onlysyntax into JavaScript code"
-        },
         "experimental-vm-modules": {
           "type": "boolean",
           "description": "experimental ES Module support in vm module"

diff --git a/doc/node.1 b/doc/node.1
@@ -741,10 +741,6 @@ collecting code coverage from tests for more details.
 Enable module mocking in the test runner.
 This feature requires \fB--allow-worker\fR if used with the Permission Model.
 .
-.It Fl -experimental-transform-types
-Enables the transformation of TypeScript-only syntax into JavaScript code.
-Implies \fB--enable-source-maps\fR.
-.
 .It Fl -experimental-vm-modules
 Enable experimental ES Module support in the \fBnode:vm\fR module.
 .
@@ -1883,8 +1879,6 @@ one is included in the list below.
 .It
 \fB--experimental-top-level-await\fR
 .It
-\fB--experimental-transform-types\fR
-.It
 \fB--experimental-vm-modules\fR
 .It
 \fB--experimental-wasi-unstable-preview1\fR