fix(app-check): run only in client

src/app-check/index.ts

@@ -6,22 +6,43 @@ import {
 } from 'firebase/app-check'
 import { App, inject, InjectionKey, Ref, ref } from 'vue'
 import { getGlobalScope } from '../globals'
+import { isClient } from '../shared'
 
 export const AppCheckTokenInjectSymbol: InjectionKey<Ref<string | undefined>> =
   Symbol('app-check-token')
 
+/**
+ * The current app-check token as a `Ref`. Note this is undefined on the server.
+ */
 export function useAppCheckToken() {
   return inject(AppCheckTokenInjectSymbol)!
 }
 
-export function VueFireAppCheck(options: AppCheckOptions) {
+export interface VueFireAppCheckOptions extends AppCheckOptions {
+  /**
+   * Setups the debug token global. See https://firebase.google.com/docs/app-check/web/debug-provider. Note you should
+   * set to false in production (or not set it at all).
+   */
+  debug?: boolean
+}
+
+export function VueFireAppCheck(options: VueFireAppCheckOptions) {
   return (firebaseApp: FirebaseApp, app: App) => {
-    const appCheck = initializeAppCheck(firebaseApp, options)
+    // provide this even on the server for simplicity of usage
     const token = getGlobalScope(firebaseApp, app).run(() => ref<string>())!
+    app.provide(AppCheckTokenInjectSymbol, token)
+
+    // AppCheck is client only as it relies on browser apis
+    if (!isClient) return
+
+    if (options.debug) {
+      // @ts-expect-error: local override
+      self.FIREBASE_APPCHECK_DEBUG_TOKEN = true
+    }
+
+    const appCheck = initializeAppCheck(firebaseApp, options)
     onTokenChanged(appCheck, (newToken) => {
       token.value = newToken.token
     })
-
-    app.provide(AppCheckTokenInjectSymbol, token)
   }
 }