chore: release

.nucleus.yaml

@@ -13,7 +13,6 @@ branches:
                 - MobilePlatform/lsdk-modules
                 - MobilePlatform/lwr-lightning-platform
                 - MobilePlatform/ui-fsm-components
-                - Skilling-and-Enablement/ui-external-enablement
                 - automation-platform/ui-externalservices-builder-components
                 - communities/microsite-template-marketing
                 - communities/shared-experience-components
@@ -26,7 +25,9 @@ branches:
                 - salesforce-experience-platform-emu/lwr-everywhere
                 - salesforce-experience-platform-emu/lwr-recipes
                 - salesforce/lwc-test
-                - salesforce/o11y-sample-app
+                # Using old major versions; tests in PRs will always fail
+                # - salesforce/o11y-sample-app
+                # - Skilling-and-Enablement/ui-external-enablement
     release:
         pull-request:
             <<: *branch-definition

package.json

@@ -1,6 +1,6 @@
 {
     "name": "lwc-monorepo",
-    "version": "8.14.0",
+    "version": "8.15.0",
     "private": true,
     "description": "Lightning Web Components",
     "repository": {
@@ -59,7 +59,7 @@
         "eslint-plugin-header": "^3.1.1",
         "eslint-plugin-import": "^2.31.0",
         "glob": "^11.0.1",
-        "globals": "^15.15.0",
+        "globals": "^16.0.0",
         "husky": "^9.1.7",
         "isbinaryfile": "^5.0.4",
         "jsdom": "^26.0.0",

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": "8.14.0",
+    "version": "8.15.0",
     "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": "8.14.0",
+    "version": "8.15.0",
     "description": "Babel plugin to transform a LWC module",
     "keywords": [
         "lwc"
@@ -47,8 +47,8 @@
     },
     "dependencies": {
         "@babel/helper-module-imports": "7.25.9",
-        "@lwc/errors": "8.14.0",
-        "@lwc/shared": "8.14.0",
+        "@lwc/errors": "8.15.0",
+        "@lwc/shared": "8.15.0",
         "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": "8.14.0",
+    "version": "8.15.0",
     "description": "LWC compiler",
     "keywords": [
         "lwc"
@@ -52,11 +52,11 @@
         "@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": "8.14.0",
-        "@lwc/errors": "8.14.0",
-        "@lwc/shared": "8.14.0",
-        "@lwc/ssr-compiler": "8.14.0",
-        "@lwc/style-compiler": "8.14.0",
-        "@lwc/template-compiler": "8.14.0"
+        "@lwc/babel-plugin-component": "8.15.0",
+        "@lwc/errors": "8.15.0",
+        "@lwc/shared": "8.15.0",
+        "@lwc/ssr-compiler": "8.15.0",
+        "@lwc/style-compiler": "8.15.0",
+        "@lwc/template-compiler": "8.15.0"
     }
 }

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": "8.14.0",
+    "version": "8.15.0",
     "description": "Core LWC engine APIs.",
     "keywords": [
         "lwc"
@@ -46,9 +46,9 @@
         }
     },
     "dependencies": {
-        "@lwc/features": "8.14.0",
-        "@lwc/shared": "8.14.0",
-        "@lwc/signals": "8.14.0"
+        "@lwc/features": "8.15.0",
+        "@lwc/shared": "8.15.0",
+        "@lwc/signals": "8.15.0"
     },
     "devDependencies": {
         "observable-membrane": "2.0.0"

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

@@ -38,6 +38,11 @@ export function checkVersionMismatch(
 ) {
     const versionMatcher = func.toString().match(LWC_VERSION_COMMENT_REGEX);
     if (!isNull(versionMatcher) && !warned) {
+        if (process.env.SKIP_LWC_VERSION_MISMATCH_CHECK === 'true') {
+            warned = true; // skip printing out version mismatch errors when env var is set
+            return;
+        }
+
         const version = versionMatcher[1];
         if (version !== LWC_VERSION) {
             warned = true; // only warn once to avoid flooding the console

packages/@lwc/engine-core/src/framework/rendering.ts

@@ -25,7 +25,7 @@ import { logError } from '../shared/logger';
 import { getComponentTag } from '../shared/format';
 import { EmptyArray, shouldBeFormAssociated } from './utils';
 import { markComponentAsDirty } from './component';
-import { getScopeTokenClass } from './stylesheet';
+import { getScopeTokenClass, isValidScopeToken } from './stylesheet';
 import { lockDomMutation, patchElementWithRestrictions, unlockDomMutation } from './restrictions';
 import {
     appendVM,
@@ -605,6 +605,10 @@ function applyStyleScoping(elm: Element, owner: VM, renderer: RendererAPI) {
     // Set the class name for `*.scoped.css` style scoping.
     const scopeToken = getScopeTokenClass(owner, /* legacy */ false);
     if (!isNull(scopeToken)) {
+        if (!isValidScopeToken(scopeToken)) {
+            // See W-16614556
+            throw new Error('stylesheet token must be a valid string');
+        }
         // TODO [#2762]: this dot notation with add is probably problematic
         // probably we should have a renderer api for just the add operation
         getClassList(elm).add(scopeToken);
@@ -614,6 +618,10 @@ function applyStyleScoping(elm: Element, owner: VM, renderer: RendererAPI) {
     if (lwcRuntimeFlags.ENABLE_LEGACY_SCOPE_TOKENS) {
         const legacyScopeToken = getScopeTokenClass(owner, /* legacy */ true);
         if (!isNull(legacyScopeToken)) {
+            if (!isValidScopeToken(legacyScopeToken)) {
+                // See W-16614556
+                throw new Error('stylesheet token must be a valid string');
+            }
             // TODO [#2762]: this dot notation with add is probably problematic
             // probably we should have a renderer api for just the add operation
             getClassList(elm).add(legacyScopeToken);

packages/@lwc/engine-core/src/framework/stylesheet.ts

@@ -9,6 +9,7 @@ import {
     ArrayPush,
     isArray,
     isNull,
+    isString,
     isTrue,
     isUndefined,
     KEY__NATIVE_ONLY_CSS,
@@ -29,6 +30,8 @@ import type { Template } from './template';
 import type { VM } from './vm';
 import type { Stylesheet, Stylesheets } from '@lwc/shared';
 
+const VALID_SCOPE_TOKEN_REGEX = /^[a-zA-Z0-9\-_]+$/;
+
 // These are only used for HMR in dev mode
 // The "pure" annotations are so that Rollup knows for sure it can remove these from prod mode
 let stylesheetsToCssContent: WeakMap<Stylesheet, Set<string>> = /*@__PURE__@*/ new WeakMap();
@@ -394,3 +397,12 @@ export function unrenderStylesheet(stylesheet: Stylesheet) {
         cssContentToAbortControllers.delete(cssContent);
     }
 }
+
+export function isValidScopeToken(token: unknown) {
+    if (!isString(token)) {
+        return false;
+    }
+
+    // See W-16614556
+    return lwcRuntimeFlags.DISABLE_SCOPE_TOKEN_VALIDATION || VALID_SCOPE_TOKEN_REGEX.test(token);
+}

packages/@lwc/engine-core/src/framework/template.ts

@@ -26,7 +26,12 @@ import api from './api';
 import { RenderMode, resetComponentRoot, runWithBoundaryProtection, ShadowMode } from './vm';
 import { assertNotProd, EmptyObject } from './utils';
 import { defaultEmptyTemplate, isTemplateRegistered } from './secure-template';
-import { createStylesheet, getStylesheetsContent, updateStylesheetToken } from './stylesheet';
+import {
+    createStylesheet,
+    getStylesheetsContent,
+    isValidScopeToken,
+    updateStylesheetToken,
+} from './stylesheet';
 import { logOperationEnd, logOperationStart, OperationId } from './profiler';
 import { getTemplateOrSwappedTemplate, setActiveVM } from './hot-swaps';
 import { getMapFromClassName } from './modules/computed-class-attr';
@@ -66,14 +71,6 @@ export function setVMBeingRendered(vm: VM | null) {
     vmBeingRendered = vm;
 }
 
-const VALID_SCOPE_TOKEN_REGEX = /^[a-zA-Z0-9\-_]+$/;
-
-// See W-16614556
-// TODO [#2826]: freeze the template object
-function isValidScopeToken(token: any) {
-    return isString(token) && VALID_SCOPE_TOKEN_REGEX.test(token);
-}
-
 function validateSlots(vm: VM) {
     assertNotProd(); // this method should never leak to prod
 
@@ -274,6 +271,7 @@ function buildParseFragmentFn(
             }
 
             // See W-16614556
+            // TODO [#2826]: freeze the template object
             if (
                 (hasStyleToken && !isValidScopeToken(stylesheetToken)) ||
                 (hasLegacyToken && !isValidScopeToken(legacyStylesheetToken))

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

@@ -4,7 +4,7 @@
         "You can safely modify dependencies, devDependencies, keywords, etc., but other props will be overwritten."
     ],
     "name": "@lwc/engine-dom",
-    "version": "8.14.0",
+    "version": "8.15.0",
     "description": "Renders LWC components in a DOM environment.",
     "keywords": [
         "lwc"
@@ -46,9 +46,9 @@
         }
     },
     "devDependencies": {
-        "@lwc/engine-core": "8.14.0",
-        "@lwc/shared": "8.14.0",
-        "@lwc/features": "8.14.0"
+        "@lwc/engine-core": "8.15.0",
+        "@lwc/shared": "8.15.0",
+        "@lwc/features": "8.15.0"
     },
     "lwc": {
         "modules": [

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

@@ -4,7 +4,7 @@
         "You can safely modify dependencies, devDependencies, keywords, etc., but other props will be overwritten."
     ],
     "name": "@lwc/engine-server",
-    "version": "8.14.0",
+    "version": "8.15.0",
     "description": "Renders LWC components in a server environment.",
     "keywords": [
         "lwc"
@@ -46,10 +46,10 @@
         }
     },
     "devDependencies": {
-        "@lwc/engine-core": "8.14.0",
-        "@lwc/rollup-plugin": "8.14.0",
-        "@lwc/shared": "8.14.0",
-        "@lwc/features": "8.14.0",
+        "@lwc/engine-core": "8.15.0",
+        "@lwc/rollup-plugin": "8.15.0",
+        "@lwc/shared": "8.15.0",
+        "@lwc/features": "8.15.0",
         "@rollup/plugin-virtual": "^3.0.2",
         "parse5": "^7.2.1"
     }

packages/@lwc/engine-server/src/__tests__/fixtures.spec.ts

@@ -132,8 +132,13 @@ function testFixtures(options?: RollupLwcOptions) {
             let result;
             let err;
             try {
+                config?.features?.forEach((flag) => {
+                    lwcEngineServer.setFeatureFlagForTest(flag, true);
+                });
+
                 const module: LightningElementConstructor = (await import(compiledFixturePath))
                     .default;
+
                 result = formatHTML(
                     lwcEngineServer.renderComponent('fixture-test', module, config?.props ?? {})
                 );
@@ -144,6 +149,10 @@ function testFixtures(options?: RollupLwcOptions) {
                 err = _err?.message || 'An empty error occurred?!';
             }
 
+            config?.features?.forEach((flag) => {
+                lwcEngineServer.setFeatureFlagForTest(flag, false);
+            });
+
             return {
                 'expected.html': result,
                 'error.txt': err,

packages/@lwc/engine-server/src/__tests__/fixtures/attribute-global-html/as-component-prop/undeclared/expected.html

@@ -1,6 +1,6 @@
 <fixture-test>
   <template shadowrootmode="open">
-    <x-child accesskey="foo" aria-activedescendant="foo" aria-atomic="foo" aria-autocomplete="foo" aria-busy="foo" aria-checked="foo" aria-colcount="foo" aria-colindex="foo" aria-colspan="foo" aria-controls="foo" aria-current="foo" aria-describedby="foo" aria-details="foo" aria-disabled="foo" aria-errormessage="foo" aria-expanded="foo" aria-flowto="foo" aria-haspopup="foo" aria-hidden="foo" aria-invalid="foo" aria-keyshortcuts="foo" aria-label="foo" aria-labelledby="foo" aria-level="foo" aria-live="foo" aria-modal="foo" aria-multiline="foo" aria-multiselectable="foo" aria-orientation="foo" aria-owns="foo" aria-placeholder="foo" aria-posinset="foo" aria-pressed="foo" aria-readonly="foo" aria-relevant="foo" aria-required="foo" aria-roledescription="foo" aria-rowcount="foo" aria-rowindex="foo" aria-rowspan="foo" aria-selected="foo" aria-setsize="foo" aria-sort="foo" aria-valuemax="foo" aria-valuemin="foo" aria-valuenow="foo" aria-valuetext="foo" dir="foo" draggable="foo" exportparts="foo" id="foo" lang="foo" role="foo" spellcheck="foo" tabindex="foo" title="foo">
+    <x-child accesskey="foo" aria-activedescendant="foo" aria-atomic="foo" aria-autocomplete="foo" aria-busy="foo" aria-checked="foo" aria-colcount="foo" aria-colindex="foo" aria-colspan="foo" aria-controls="foo" aria-current="foo" aria-describedby="foo" aria-details="foo" aria-disabled="foo" aria-errormessage="foo" aria-expanded="foo" aria-flowto="foo" aria-haspopup="foo" aria-hidden="foo" aria-invalid="foo" aria-keyshortcuts="foo" aria-label="foo" aria-labelledby="foo" aria-level="foo" aria-live="foo" aria-modal="foo" aria-multiline="foo" aria-multiselectable="foo" aria-orientation="foo" aria-owns="foo" aria-placeholder="foo" aria-posinset="foo" aria-pressed="foo" aria-readonly="foo" aria-relevant="foo" aria-required="foo" aria-roledescription="foo" aria-rowcount="foo" aria-rowindex="foo" aria-rowspan="foo" aria-selected="foo" aria-setsize="foo" aria-sort="foo" aria-valuemax="foo" aria-valuemin="foo" aria-valuenow="foo" aria-valuetext="foo" dir="foo" exportparts="foo" id="foo" lang="foo" role="foo" title="foo">
       <template shadowrootmode="open">
         <span>
           accessKey: foo
@@ -56,9 +56,6 @@
         <span>
           ariaHasPopup: foo
         </span>
-        <span>
-          ariaHidden: foo
-        </span>
         <span>
           ariaInvalid: foo
         </span>
@@ -191,9 +188,6 @@
         <span>
           disabled: 
         </span>
-        <span>
-          draggable: false
-        </span>
         <span>
           enterkeyhint: 
         </span>
@@ -305,12 +299,6 @@
         <span>
           selected: 
         </span>
-        <span>
-          spellcheck: true
-        </span>
-        <span>
-          tabIndex: -1
-        </span>
         <span>
           textarea: 
         </span>

packages/@lwc/engine-server/src/__tests__/fixtures/attribute-global-html/as-component-prop/undeclared/modules/x/child/child.html

@@ -17,7 +17,6 @@
     <span>ariaExpanded: {ariaExpanded}</span>
     <span>ariaFlowTo: {ariaFlowTo}</span>
     <span>ariaHasPopup: {ariaHasPopup}</span>
-    <span>ariaHidden: {ariaHidden}</span>
     <span>ariaInvalid: {ariaInvalid}</span>
     <span>ariaKeyShortcuts: {ariaKeyShortcuts}</span>
     <span>ariaLabel: {ariaLabel}</span>
@@ -62,7 +61,6 @@
     <span>details: {details}</span>
     <span>dir: {dir}</span>
     <span>disabled: {disabled}</span>
-    <span>draggable: {draggable}</span>
     <span>enterkeyhint: {enterkeyhint}</span>
     <span>exportparts: {exportparts}</span>
     <span>fieldset: {fieldset}</span>
@@ -100,11 +98,9 @@
     <span>rowSpan: {rowSpan}</span>
     <span>select: {select}</span>
     <span>selected: {selected}</span>
-    <span>spellcheck: {spellcheck}</span>
-    <span>tabIndex: {tabIndex}</span>
     <span>textarea: {textarea}</span>
     <span>title: {title}</span>
     <span>translate: {translate}</span>
     <span>useMap: {useMap}</span>
     <span>video: {video}</span>
-</template>
+</template>