From 3ead02cb641c572a0c2b5ffeb55a4188188b2e4d Mon Sep 17 00:00:00 2001
From: sebastien <lorber.sebastien@gmail.com>
Date: Fri, 17 Oct 2025 19:21:11 +0200
Subject: [PATCH] Improve node SWC / browserslist target

---
 .../src/loaders/jsLoader.ts                   |  4 +--
 .../docusaurus-bundler/src/minification.ts    |  5 ++-
 packages/docusaurus-faster/src/index.ts       | 34 +++++++++++++------
 3 files changed, 29 insertions(+), 14 deletions(-)

diff --git a/packages/docusaurus-bundler/src/loaders/jsLoader.ts b/packages/docusaurus-bundler/src/loaders/jsLoader.ts
index 6f9213454d..51d749ce64 100644
--- a/packages/docusaurus-bundler/src/loaders/jsLoader.ts
+++ b/packages/docusaurus-bundler/src/loaders/jsLoader.ts
@@ -28,7 +28,7 @@ async function createSwcJsLoaderFactory(): Promise<
   return ({isServer}) => {
     return {
       loader,
-      options: getOptions({isServer}),
+      options: getOptions({isServer, bundlerName: 'webpack'}),
     };
   };
 }
@@ -42,7 +42,7 @@ async function createRspackSwcJsLoaderFactory(): Promise<
   return ({isServer}) => {
     return {
       loader,
-      options: getOptions({isServer}),
+      options: getOptions({isServer, bundlerName: 'rspack'}),
     };
   };
 }
diff --git a/packages/docusaurus-bundler/src/minification.ts b/packages/docusaurus-bundler/src/minification.ts
index 0c4d2d8dde..a06b81c988 100644
--- a/packages/docusaurus-bundler/src/minification.ts
+++ b/packages/docusaurus-bundler/src/minification.ts
@@ -142,7 +142,10 @@ async function getRspackMinimizers({
 }: MinimizersConfig): Promise<WebpackPluginInstance[]> {
   const rspack = getCurrentBundlerAsRspack({currentBundler});
   const getBrowserslistQueries = await importGetBrowserslistQueries();
-  const browserslistQueries = getBrowserslistQueries({isServer: false});
+  const browserslistQueries = getBrowserslistQueries({
+    isServer: false,
+    bundlerName: 'rspack',
+  });
   const swcJsMinimizerOptions = await importSwcJsMinimizerOptions();
   return [
     // See https://rspack.dev/plugins/rspack/swc-js-minimizer-rspack-plugin
diff --git a/packages/docusaurus-faster/src/index.ts b/packages/docusaurus-faster/src/index.ts
index fb2b6d7538..d280160328 100644
--- a/packages/docusaurus-faster/src/index.ts
+++ b/packages/docusaurus-faster/src/index.ts
@@ -11,17 +11,20 @@ import browserslist from 'browserslist';
 import {minify as swcHtmlMinifier} from '@swc/html';
 import semver from 'semver';
 import type {JsMinifyOptions, Options as SwcOptions} from '@swc/core';
+import type {CurrentBundler} from '@docusaurus/types';
 
 export const swcLoader = require.resolve('swc-loader');
 
 export const getSwcLoaderOptions = ({
   isServer,
+  bundlerName,
 }: {
   isServer: boolean;
+  bundlerName: CurrentBundler['name'];
 }): SwcOptions => {
   return {
     env: {
-      targets: getBrowserslistQueries({isServer}),
+      targets: getBrowserslistQueries({isServer, bundlerName}),
     },
     jsc: {
       parser: {
@@ -66,7 +69,13 @@ export function getSwcJsMinimizerOptions(): JsMinifyOptions {
 
 // TODO this is not accurate
 //  for Rspack we should read from the built-in browserslist data
-function getLastBrowserslistKnownNodeVersion(): string {
+function getLastBrowserslistKnownNodeVersion(
+  bundlerName: CurrentBundler['name'],
+): string {
+  if (bundlerName === 'rspack') {
+    // TODO hardcoded value until Rspack exposes its Browserslist data
+    return '22.0.0';
+  }
   // browserslist('last 1 node versions')[0]!.replace('node ', '')
   return browserslist.nodeVersions.at(-1)!;
 }
@@ -79,19 +88,22 @@ function getMinVersion(v1: string, v2: string): string {
 // See https://github.com/orgs/browserslist/discussions/846
 export function getBrowserslistQueries({
   isServer,
+  bundlerName,
 }: {
   isServer: boolean;
+  bundlerName: CurrentBundler['name'];
 }): string[] {
   if (isServer) {
-    const nodeTarget =
-      // Escape hatch env variable
-      process.env.DOCUSAURUS_SERVER_NODE_TARGET ??
-      // For server builds, we want to use the current Node version as target
-      // But we can't pass a target that Browserslist doesn't know about yet
-      getMinVersion(
-        process.versions.node,
-        getLastBrowserslistKnownNodeVersion(),
-      );
+    // Escape hatch env variable
+    if (process.env.DOCUSAURUS_SERVER_NODE_TARGET) {
+      return [`node ${process.env.DOCUSAURUS_SERVER_NODE_TARGET}`];
+    }
+    // For server builds, we want to use the current Node version as target
+    // But we can't pass a target that Browserslist doesn't know about yet
+    const nodeTarget = getMinVersion(
+      process.versions.node,
+      getLastBrowserslistKnownNodeVersion(bundlerName),
+    );
 
     return [`node ${nodeTarget}`];
   }