feat(vue,nuxt): Add function to dynamically update Clerk options

.changeset/fast-bananas-visit.md

@@ -0,0 +1,35 @@
+---
+"@clerk/nuxt": minor
+"@clerk/vue": minor
+---
+
+Introduce `updateClerkOptions()` utility function to update Clerk options on the fly.
+
+Usage:
+
+```vue
+<script setup>
+import { updateClerkOptions } from '@clerk/vue'
+import { dark } from '@clerk/themes'
+import { frFR } from '@clerk/localizations'
+
+function enableDarkTheme() {
+  updateClerkOptions({
+    appearance: {
+      baseTheme: dark
+    }
+  })
+}
+
+function changeToFrench() {
+  updateClerkOptions({
+    localization: frFR
+  })
+}
+</script>
+
+<template>
+  <button @click="enableDarkTheme">Enable Dark Theme</button>
+  <button @click="changeToFrench">Change to French</button>
+</template>
+```

integration/presets/vue.ts

@@ -10,7 +10,8 @@ const vite = applicationConfig()
   .addScript('dev', 'pnpm dev')
   .addScript('build', 'pnpm build')
   .addScript('serve', 'pnpm preview')
-  .addDependency('@clerk/vue', linkPackage('vue'));
+  .addDependency('@clerk/vue', linkPackage('vue'))
+  .addDependency('@clerk/localizations', linkPackage('localizations'));
 
 export const vue = {
   vite,

integration/templates/vue-vite/src/App.vue

@@ -1,6 +1,7 @@
 <script setup lang="ts">
 import { SignedIn, SignedOut, ClerkLoaded, ClerkLoading } from '@clerk/vue';
 import CustomUserButton from './components/CustomUserButton.vue';
+import LanguagePicker from './components/LanguagePicker.vue';
 </script>
 
 <template>
@@ -9,6 +10,7 @@ import CustomUserButton from './components/CustomUserButton.vue';
       <div style="flex-grow: 1">
         <p class="title">Vue Clerk Integration test</p>
       </div>
+      <LanguagePicker />
       <SignedIn>
         <CustomUserButton />
       </SignedIn>

integration/templates/vue-vite/src/components/LanguagePicker.vue

@@ -0,0 +1,25 @@
+<script setup lang="ts">
+import { updateClerkOptions } from '@clerk/vue';
+
+const onChange = async (event: Event) => {
+  const value = (event.target as HTMLSelectElement).value;
+  let localization: Record<string, any> | undefined;
+
+  if (value === 'fr') {
+    localization = (await import('@clerk/localizations/fr-FR')).frFR;
+  } else {
+    localization = undefined;
+  }
+
+  updateClerkOptions({
+    localization,
+  });
+};
+</script>
+
+<template>
+  <select @change="onChange">
+    <option value="en">English</option>
+    <option value="fr">French</option>
+  </select>
+</template>

integration/tests/vue/components.test.ts

@@ -297,4 +297,23 @@ testAgainstRunningApps({ withEnv: [appConfigs.envs.withCustomRoles] })('basic te
 
     await fakeAdmin.deleteIfExists();
   });
+
+  test('Update Clerk options on the fly with updateClerkOptions()', async ({ page, context }) => {
+    const u = createTestUtils({ app, page, context });
+
+    // Navigate and wait for sign-in component to load
+    await u.page.goToRelative('/sign-in');
+    await u.po.signIn.waitForMounted();
+
+    // Verify initial English state
+    await expect(u.page.getByText('Welcome back! Please sign in to continue')).toBeVisible();
+
+    // Change to French and verify
+    await u.page.locator('select').selectOption({ label: 'French' });
+    await expect(u.page.getByText('pour continuer vers')).toBeVisible();
+
+    // Revert to English and verify
+    await u.page.locator('select').selectOption({ label: 'English' });
+    await expect(u.page.getByText('Welcome back! Please sign in to continue')).toBeVisible();
+  });
 });

packages/nuxt/src/module.ts

@@ -99,10 +99,16 @@ export default defineNuxtModule<ModuleOptions>({
 
     // Add auto-imports for Clerk components, composables and client utils
     addImportsDir(resolver.resolve('./runtime/composables'));
-    addImports({
-      name: 'createRouteMatcher',
-      from: resolver.resolve('./runtime/client'),
-    });
+    addImports([
+      {
+        name: 'createRouteMatcher',
+        from: resolver.resolve('./runtime/client'),
+      },
+      {
+        name: 'updateClerkOptions',
+        from: resolver.resolve('./runtime/client'),
+      },
+    ]);
 
     // eslint-disable-next-line @typescript-eslint/consistent-type-imports
     const components: Array<keyof typeof import('@clerk/vue')> = [

packages/nuxt/src/runtime/client/index.ts

@@ -1 +1,2 @@
 export { createRouteMatcher } from './routeMatcher';
+export { updateClerkOptions } from '@clerk/vue';

packages/vue/src/index.ts

@@ -6,6 +6,7 @@ export * from './components';
 export * from './composables';
 
 export { clerkPlugin } from './plugin';
+export { updateClerkOptions } from './utils';
 
 setErrorThrowerOptions({ packageName: PACKAGE_NAME });
 setClerkJsLoadingErrorPackageName(PACKAGE_NAME);

packages/vue/src/utils/index.ts

@@ -1,3 +1,4 @@
 export * from './childrenUtils';
 export * from './toComputedRefs';
 export * from './useClerkLoaded';
+export * from './updateClerkOptions';

packages/vue/src/utils/updateClerkOptions.ts

@@ -0,0 +1,31 @@
+import type { ClerkOptions } from '@clerk/types';
+
+type ClerkUpdateOptions = Pick<ClerkOptions, 'appearance' | 'localization'>;
+
+/**
+ * Updates Clerk's options at runtime.
+ *
+ * @param options - The Clerk options to update
+ *
+ * @example
+ * import { frFR } from '@clerk/localizations';
+ * import { dark } from '@clerk/themes';
+ *
+ * updateClerkOptions({
+ *   appearance: { baseTheme: dark },
+ *   localization: frFR
+ * });
+ */
+export function updateClerkOptions(options: ClerkUpdateOptions) {
+  if (!window.Clerk) {
+    throw new Error('Missing Clerk instance');
+  }
+
+  // @ts-expect-error - `__unstable__updateProps` is not exposed as public API from `@clerk/types`
+  void window.Clerk.__unstable__updateProps({
+    options: {
+      localization: options.localization,
+    },
+    appearance: options.appearance,
+  });
+}