feat(@angular/cli): officially support Node.js v16

Node.js v16 will be entering an LTS state prior to the release of Angular v13 which allows Node.js v16 to be marked as officially supported by the Angular CLI. The initial bootstrapping check now adds Node.js v16 to the output message in the event of an unsupported Node.js version.
NOTE: Prior to the final v13 release, the Node.js v16 minor should be updated to the actual LTS version once available.

lib/packages.ts

@@ -85,7 +85,7 @@ function loadPackageJson(p: string) {
       // Overwrite engines to a common default.
       case 'engines':
         pkg['engines'] = {
-          'node': '^12.20.0 || >=14.0.0',
+          'node': '^12.20.0 || ^14.15.0 || >=16.10.0',
           'npm': '^6.11.0 || ^7.5.6',
           'yarn': '>= 1.13.0',
         };

package.json

@@ -40,7 +40,7 @@
     "url": "https://github.com/angular/angular-cli.git"
   },
   "engines": {
-    "node": "^12.20.0 || ^14.0.0",
+    "node": "^12.20.0 || ^14.15.0 || ^16.10.0",
     "yarn": ">=1.21.1 <2",
     "npm": "Please use yarn instead of NPM to install dependencies"
   },

packages/angular/cli/bin/ng.js

@@ -24,8 +24,8 @@ try {
 // These may not support ES2015 features such as const/let/async/await/etc.
 // These would then crash with a hard to diagnose error message.
 var version = process.versions.node.split('.').map((part) => Number(part));
-if (version[0] % 2 === 1 && version[0] > 14) {
-  // Allow new odd numbered releases with a warning (currently v15+)
+if (version[0] % 2 === 1 && version[0] > 16) {
+  // Allow new odd numbered releases with a warning (currently v17+)
   console.warn(
     'Node.js version ' +
       process.version +
@@ -38,15 +38,17 @@ if (version[0] % 2 === 1 && version[0] > 14) {
 } else if (
   version[0] < 12 ||
   version[0] === 13 ||
+  version[0] === 15 ||
   (version[0] === 12 && version[1] < 20) ||
-  (version[0] === 14 && version[1] < 15)
+  (version[0] === 14 && version[1] < 15) ||
+  (version[0] === 16 && version[1] < 10)
 ) {
-  // Error and exit if less than 12.20 or 13.x or less than 14.15
+  // Error and exit if less than 12.20 or 13.x or less than 14.15 or 15.x or less than 16.10
   console.error(
     'Node.js version ' +
       process.version +
       ' detected.\n' +
-      'The Angular CLI requires a minimum Node.js version of either v12.20 or v14.15.\n\n' +
+      'The Angular CLI requires a minimum Node.js version of either v12.20, v14.15, or v16.10.\n\n' +
       'Please update your Node.js version or visit https://nodejs.org/ for additional instructions.\n',
   );
 

packages/angular/cli/commands/version-impl.ts

@@ -16,7 +16,7 @@ import { Schema as VersionCommandSchema } from './version';
 /**
  * Major versions of Node.js that are officially supported by Angular.
  */
-const SUPPORTED_NODE_MAJORS = [12, 14];
+const SUPPORTED_NODE_MAJORS = [12, 14, 16];
 
 interface PartialPackageInfo {
   name: string;

packages/angular/cli/lib/cli/index.ts

@@ -23,10 +23,10 @@ const isDebug = debugEnv !== undefined && debugEnv !== '0' && debugEnv.toLowerCa
 export default async function (options: { testing?: boolean; cliArgs: string[] }) {
   // This node version check ensures that the requirements of the project instance of the CLI are met
   const version = process.versions.node.split('.').map((part) => Number(part));
-  if (version[0] < 12 || (version[0] === 12 && version[1] < 14)) {
+  if (version[0] < 12 || (version[0] === 12 && version[1] < 20)) {
     process.stderr.write(
       `Node.js version ${process.version} detected.\n` +
-        'The Angular CLI requires a minimum v12.14.\n\n' +
+        'The Angular CLI requires a minimum v12.20.\n\n' +
         'Please update your Node.js version or visit https://nodejs.org/ for additional instructions.\n',
     );
 

tests/legacy-cli/e2e/tests/commands/add/version-specifier.ts

@@ -22,7 +22,8 @@ export default async function () {
     throw new Error('Installation should not have been skipped');
   }
 
-  const output3 = await ng('add', '@angular/localize@12.0.0', '--skip-confirmation');
+  // v12.2.0 has a package.json engine field that supports Node.js v16+
+  const output3 = await ng('add', '@angular/localize@12.2.0', '--skip-confirmation');
   if (output3.stdout.includes('Skipping installation: Package already installed')) {
     throw new Error('Installation should not have been skipped');
   }