Add Node 26 support

.github/workflows/ci.yml

@@ -18,6 +18,9 @@ jobs:
           - os: ubuntu-latest
             nodeVersion: 24.14.x
             displayName: Ubuntu
+          - os: ubuntu-latest
+            nodeVersion: 26.x
+            displayName: Ubuntu (Node 26)
           - os: windows-latest
             nodeVersion: 24.14.x
             displayName: Windows

CLAUDE.md

@@ -6,7 +6,7 @@ This document contains important information for Claude (AI assistant) when work
 
 ### Node.js Version Management
 
-This repository requires **Node.js 22.14.0 or later** (but < 23.0.0) as specified in `rush.json`.
+This repository requires **Node.js `>=22.14.0 <23.0.0`, `>=24.12.0 <25.0.0`, or `>=26.0.0 <27.0.0`** as specified in `rush.json`.
 
 **IMPORTANT**: This system uses **nvs** (Node Version Switcher) to manage Node.js versions.
 

README.md

@@ -12,7 +12,7 @@
   <a href="https://github.com/SharePoint/spfx/actions/workflows/ci.yml"><img src="https://github.com/SharePoint/spfx/actions/workflows/ci.yml/badge.svg?branch=main" alt="CI" /></a>
   <a href="https://www.npmjs.com/package/@microsoft/spfx-cli"><img src="https://img.shields.io/npm/v/@microsoft/spfx-cli" alt="npm version" /></a>
   <a href="https://github.com/SharePoint/spfx/blob/main/LICENSE"><img src="https://img.shields.io/badge/license-MIT-blue" alt="MIT License" /></a>
-  <img src="https://img.shields.io/badge/node-22.x_%7C_24.x-brightgreen" alt="Node.js 22.x | 24.x" />
+  <img src="https://img.shields.io/badge/node-22.x_%7C_24.x_%7C_26.x-brightgreen" alt="Node.js 22.x | 24.x | 26.x" />
   <img src="https://img.shields.io/badge/SPFx-1.23.2-blue" alt="SPFx 1.23.2" />
 </p>
 

api/spfx-template-api/README.md

@@ -8,7 +8,7 @@ Programmatic API for loading, rendering, and writing [SharePoint Framework (SPFx
 npm install @microsoft/spfx-template-api
 ```
 
-**Requires Node.js `>=22.14.0 <23.0.0` or `>=24.12.0 <25.0.0`**
+**Requires Node.js `>=22.14.0 <23.0.0`, `>=24.12.0 <25.0.0`, or `>=26.0.0 <27.0.0`**
 
 ---
 

apps/spfx-cli/README.md

@@ -8,7 +8,7 @@ The official CLI for scaffolding [SharePoint Framework (SPFx)](https://aka.ms/sp
 npm install -g @microsoft/spfx-cli
 ```
 
-**Requires Node.js `>=22.14.0 <23.0.0` or `>=24.12.0 <25.0.0`**
+**Requires Node.js `>=22.14.0 <23.0.0`, `>=24.12.0 <25.0.0`, or `>=26.0.0 <27.0.0`**
 
 ---
 

apps/spfx-cli/package.json

@@ -5,7 +5,7 @@
   "main": "lib/index.js",
   "license": "MIT",
   "engines": {
-    "node": ">=22.14.0 <23.0.0 || >=24.12.0 <25.0.0"
+    "node": ">=22.14.0 <23.0.0 || >=24.12.0 <25.0.0 || >=26.0.0 <27.0.0"
   },
   "scripts": {
     "build": "heft test --clean",

common/changes/@microsoft/spfx-cli/iclanton-node-26-support_2026-09-28-21-35-51.json

@@ -0,0 +1,11 @@
+{
+  "changes": [
+    {
+      "comment": "",
+      "type": "none",
+      "packageName": "@microsoft/spfx-cli"
+    }
+  ],
+  "packageName": "@microsoft/spfx-cli",
+  "email": "ianc@microsoft.com"
+}

common/config/rush/pnpm-config.json

@@ -203,7 +203,9 @@
   "globalOverrides": {
     // "example1": "^1.0.0",
     // "example2": "npm:@company/example2@^1.0.0"
-    "baseline-browser-mapping": "^2.9.19"
+    "baseline-browser-mapping": "^2.9.19",
+    // Jest 30.4 fixes Node 26 localStorage warnings that cause Rush test phases to fail.
+    "jest-environment-node": "^30.4.0"
   },
 
   /**
@@ -275,7 +277,11 @@
    * PNPM documentation: https://pnpm.io/package_json#pnpmneverbuiltdependencies
    */
   "globalNeverBuiltDependencies": [
-    // "fsevents"
+    // Skip postinstall scripts that download native bindings from the public
+    // registry; these fail in the internal CI feed and the packages fall back
+    // to their bundled WASM build. See jest-resolve -> unrs-resolver.
+    "oxc-resolver",
+    "unrs-resolver"
   ],
 
   /**