Merge branch 'salesforce:master' into lwc_on

Author: gaurav-rk9

.github/dependabot.yml

@@ -39,8 +39,6 @@ updates:
               patterns:
                   - 'webdriverio'
                   - '@wdio/*'
-              update-types:
-                  - 'major'
           prettier:
               patterns:
                   - 'prettier'

.github/workflows/unit.yml

@@ -66,6 +66,8 @@ jobs:
               run: yarn test:types
             - name: Run unit tests
               run: yarn test:ci
+            - name: Run unit tests in production mode
+              run: yarn test:production --no-watch
             - name: Upload unit test coverage report
               uses: actions/upload-artifact@v4
               with:

eslint.config.mjs

@@ -12,6 +12,8 @@ import js from '@eslint/js';
 import tseslint from 'typescript-eslint';
 import gitignore from 'eslint-config-flat-gitignore';
 import vitest from '@vitest/eslint-plugin';
+import * as espree from 'espree';
+
 import { PUBLIC_PACKAGES as publicPackageData } from './scripts/shared/packages.mjs';
 // convert filepath to eslint glob
 const PUBLIC_PACKAGES = publicPackageData.map(({ path }) => `${path}/**`);
@@ -27,7 +29,7 @@ export default tseslint.config(
 
     gitignore(),
     {
-        ignores: ['**/fixtures'],
+        ignores: ['packages/**/fixtures/**/*.js'],
     },
     js.configs.recommended,
     ...tseslint.configs.recommendedTypeChecked,
@@ -403,18 +405,35 @@ export default tseslint.config(
 
     {
         // These are empty files used to help debug test fixtures
-        files: ['**/.only'],
+        files: ['**/.only', '**/.skip'],
         plugins: { '@lwc/lwc-internal': lwcInternal },
+        languageOptions: {
+            // Using the default eslint parser because typescript-eslint doesn't
+            // seem to correctly support `extraFileExtensions`
+            parser: espree,
+            parserOptions: {
+                extraFileExtensions: ['only', 'skip'],
+            },
+        },
         rules: {
             '@lwc/lwc-internal/forbidden-filename': 'error',
+            // Disable all TS rules because they complain about the parser being espree
+            ...Object.fromEntries(
+                tseslint.configs.all
+                    .flatMap((cfg) => Object.keys(cfg.rules ?? {}))
+                    .map((rule) => [rule, 'off'])
+            ),
         },
     },
     {
-        // These are empty files used to help debug test fixtures
         files: ['**/.skip'],
-        plugins: { '@lwc/lwc-internal': lwcInternal },
         rules: {
-            '@lwc/lwc-internal/forbidden-filename': 'off',
+            // We want to avoid accidentally committing .skip files, but sometimes there are
+            // legitimate reasons to do so. So we complain when trying to commit, but not any
+            // other time.
+            '@lwc/lwc-internal/forbidden-filename':
+                // eslint-disable-next-line no-undef
+                process.env.npm_lifecycle_event === 'lint-staged' ? 'error' : 'off',
         },
     }
 );

package.json

@@ -1,6 +1,6 @@
 {
     "name": "lwc-monorepo",
-    "version": "8.15.1",
+    "version": "8.18.1",
     "private": true,
     "description": "Lightning Web Components",
     "repository": {
@@ -19,6 +19,7 @@
         "copy-fork": "./scripts/tasks/unsafe-external-contributor-ci-workaround.sh",
         "dev": "nx run-many --target=dev --all --parallel=999 --exclude=@lwc/perf-benchmarks,@lwc/perf-benchmarks-components,@lwc/integration-tests",
         "test": "vitest --workspace vitest.workspace.mjs",
+        "test:production": "VITE_NODE_ENV=production vitest --workspace vitest.workspace.mjs",
         "test:bespoke": "nx run-many --target=test",
         "test:debug": "vitest --workspace vitest.workspace.mjs --inspect-brk --no-file-parallelism",
         "test:ci": "vitest run --workspace vitest.workspace.mjs --coverage",
@@ -30,56 +31,56 @@
         "test:performance:best": "nx test:best @lwc/perf-benchmarks",
         "test:performance:best:ci": "nx test:best:ci @lwc/perf-benchmarks",
         "test:types": "nx test @lwc/integration-types",
-        "release:version": "node ./scripts/release/version.js",
-        "release:publish": "nx release publish --registry https://registry.npmjs.org"
+        "release:version": "./scripts/release/version.sh",
+        "release:publish": "./scripts/release/publish.sh",
+        "release:publish:canary": "nx release publish --registry https://registry.npmjs.org"
     },
     "devDependencies": {
-        "@commitlint/cli": "^19.7.1",
-        "@eslint/js": "9.20.0",
+        "@commitlint/cli": "^19.8.0",
+        "@eslint/js": "9.24.0",
         "@lwc/eslint-plugin-lwc-internal": "link:./scripts/eslint-plugin",
         "@lwc/test-utils-lwc-internals": "link:./scripts/test-utils",
-        "@nx/js": "20.4.4",
-        "@rollup/plugin-commonjs": "^28.0.2",
+        "@nx/js": "20.7.2",
+        "@rollup/plugin-commonjs": "^28.0.3",
         "@rollup/plugin-inject": "^5.0.5",
-        "@rollup/plugin-node-resolve": "^16.0.0",
+        "@rollup/plugin-node-resolve": "^16.0.1",
         "@rollup/plugin-replace": "^6.0.2",
         "@rollup/plugin-typescript": "^12.1.2",
-        "@swc-node/register": "~1.10.9",
-        "@swc/core": "~1.10.16",
-        "@swc/helpers": "~0.5.15",
+        "@swc-node/register": "~1.10.10",
+        "@swc/core": "~1.11.21",
+        "@swc/helpers": "~0.5.17",
         "@types/babel__core": "^7.20.5",
-        "@types/node": "^22.13.4",
-        "@vitest/coverage-v8": "^3.0.5",
-        "@vitest/eslint-plugin": "^1.1.31",
-        "@vitest/ui": "^3.0.5",
+        "@types/node": "^22.14.1",
+        "@vitest/coverage-v8": "^3.1.1",
+        "@vitest/eslint-plugin": "^1.1.42",
+        "@vitest/ui": "^3.1.1",
         "bytes": "^3.1.2",
         "es-module-lexer": "^1.6.0",
-        "eslint": "9.20.1",
-        "eslint-config-flat-gitignore": "^2.0.0",
+        "eslint": "9.24.0",
+        "eslint-config-flat-gitignore": "^2.1.0",
         "eslint-plugin-header": "^3.1.1",
         "eslint-plugin-import": "^2.31.0",
         "glob": "^11.0.1",
         "globals": "^16.0.0",
         "husky": "^9.1.7",
         "isbinaryfile": "^5.0.4",
-        "jsdom": "^26.0.0",
-        "lint-staged": "^15.4.3",
+        "jsdom": "^26.1.0",
+        "lint-staged": "^15.5.1",
         "magic-string": "^0.30.17",
-        "nx": "20.4.4",
-        "prettier": "^3.5.1",
-        "rollup": "^4.34.8",
+        "nx": "20.7.2",
+        "prettier": "^3.5.3",
+        "rollup": "^4.40.0",
         "terser": "^5.39.0",
         "tslib": "^2.8.1",
-        "typescript": "5.7.3",
-        "typescript-eslint": "8.24.0",
-        "vitest": "^3.0.5"
+        "typescript": "5.8.2",
+        "typescript-eslint": "8.29.1",
+        "vitest": "^3.1.1"
     },
     "lint-staged": {
-        "*.{js,mjs,ts}": "eslint --cache",
-        "*.{css,js,json,md,mjs,ts,yaml,yml}": "prettier --write",
-        "{packages/**/package.json,scripts/tasks/check-and-rewrite-package-json.js}": "node ./scripts/tasks/check-and-rewrite-package-json.js",
-        "{LICENSE-CORE.md,**/LICENSE.md,yarn.lock,scripts/tasks/generate-license-files.js,scripts/shared/bundled-dependencies.js}": "node ./scripts/tasks/generate-license-files.js",
-        "*.{only,skip}": "eslint --cache --no-eslintrc --plugin '@lwc/eslint-plugin-lwc-internal' --rule '@lwc/lwc-internal/forbidden-filename: error'"
+        "*.{js,mjs,ts,only,skip}": "eslint --cache",
+        "*.{css,js,json,md,mjs,ts,yaml,yml}": "prettier --check",
+        "{packages/**/package.json,scripts/tasks/check-and-rewrite-package-json.js}": "node ./scripts/tasks/check-and-rewrite-package-json.js --test",
+        "{LICENSE-CORE.md,**/LICENSE.md,yarn.lock,scripts/tasks/generate-license-files.js,scripts/shared/bundled-dependencies.js}": "node ./scripts/tasks/generate-license-files.js --test"
     },
     "workspaces": [
         "packages/@lwc/*",

packages/@lwc/aria-reflection/package.json

@@ -4,7 +4,7 @@
         "You can safely modify dependencies, devDependencies, keywords, etc., but other props will be overwritten."
     ],
     "name": "@lwc/aria-reflection",
-    "version": "8.15.1",
+    "version": "8.18.1",
     "description": "ARIA element reflection polyfill for strings",
     "keywords": [
         "aom",

packages/@lwc/babel-plugin-component/package.json

@@ -4,7 +4,7 @@
         "You can safely modify dependencies, devDependencies, keywords, etc., but other props will be overwritten."
     ],
     "name": "@lwc/babel-plugin-component",
-    "version": "8.15.1",
+    "version": "8.18.1",
     "description": "Babel plugin to transform a LWC module",
     "keywords": [
         "lwc"
@@ -47,8 +47,8 @@
     },
     "dependencies": {
         "@babel/helper-module-imports": "7.25.9",
-        "@lwc/errors": "8.15.1",
-        "@lwc/shared": "8.15.1",
+        "@lwc/errors": "8.18.1",
+        "@lwc/shared": "8.18.1",
         "line-column": "~1.0.2"
     },
     "devDependencies": {

packages/@lwc/compiler/package.json

@@ -4,7 +4,7 @@
         "You can safely modify dependencies, devDependencies, keywords, etc., but other props will be overwritten."
     ],
     "name": "@lwc/compiler",
-    "version": "8.15.1",
+    "version": "8.18.1",
     "description": "LWC compiler",
     "keywords": [
         "lwc"
@@ -46,17 +46,17 @@
         }
     },
     "dependencies": {
-        "@babel/core": "7.26.9",
+        "@babel/core": "7.26.10",
         "@babel/plugin-transform-async-generator-functions": "7.26.8",
         "@babel/plugin-transform-async-to-generator": "7.25.9",
         "@babel/plugin-transform-class-properties": "7.25.9",
         "@babel/plugin-transform-object-rest-spread": "7.25.9",
         "@locker/babel-plugin-transform-unforgeables": "0.22.0",
-        "@lwc/babel-plugin-component": "8.15.1",
-        "@lwc/errors": "8.15.1",
-        "@lwc/shared": "8.15.1",
-        "@lwc/ssr-compiler": "8.15.1",
-        "@lwc/style-compiler": "8.15.1",
-        "@lwc/template-compiler": "8.15.1"
+        "@lwc/babel-plugin-component": "8.18.1",
+        "@lwc/errors": "8.18.1",
+        "@lwc/shared": "8.18.1",
+        "@lwc/ssr-compiler": "8.18.1",
+        "@lwc/style-compiler": "8.18.1",
+        "@lwc/template-compiler": "8.18.1"
     }
 }

packages/@lwc/engine-core/package.json

@@ -4,7 +4,7 @@
         "You can safely modify dependencies, devDependencies, keywords, etc., but other props will be overwritten."
     ],
     "name": "@lwc/engine-core",
-    "version": "8.15.1",
+    "version": "8.18.1",
     "description": "Core LWC engine APIs.",
     "keywords": [
         "lwc"
@@ -46,9 +46,9 @@
         }
     },
     "dependencies": {
-        "@lwc/features": "8.15.1",
-        "@lwc/shared": "8.15.1",
-        "@lwc/signals": "8.15.1"
+        "@lwc/features": "8.18.1",
+        "@lwc/shared": "8.18.1",
+        "@lwc/signals": "8.18.1"
     },
     "devDependencies": {
         "observable-membrane": "2.0.0"

packages/@lwc/engine-core/src/framework/check-version-mismatch.ts

@@ -38,7 +38,12 @@ export function checkVersionMismatch(
 ) {
     const versionMatcher = func.toString().match(LWC_VERSION_COMMENT_REGEX);
     if (!isNull(versionMatcher) && !warned) {
-        if (typeof process === 'object' && process.env.SKIP_LWC_VERSION_MISMATCH_CHECK === 'true') {
+        if (
+            typeof process === 'object' &&
+            typeof process?.env === 'object' &&
+            process.env &&
+            process.env.SKIP_LWC_VERSION_MISMATCH_CHECK === 'true'
+        ) {
             warned = true; // skip printing out version mismatch errors when env var is set
             return;
         }

packages/@lwc/engine-core/src/framework/decorators/register.ts

@@ -254,7 +254,7 @@ export function registerDecorators(
                     validateMethodDecoratedWithWire(Ctor, fieldOrMethodName, descriptor);
                 }
                 if (isUndefined(descriptor)) {
-                    throw new Error();
+                    throw new Error(`Missing descriptor for wired method "${fieldOrMethodName}".`);
                 }
                 wiredMethods[fieldOrMethodName] = descriptor;
                 storeWiredMethodMeta(descriptor, adapter, configCallback, dynamic);