[null,null,["最后更新时间 (UTC)：2025-08-23。"],[],[],null,["If, after you have registered your app for App Check, you want to run your\napp in an environment that App Check would normally not classify as valid,\nsuch as locally during development, or from a continuous integration (CI)\nenvironment, you can create a debug build of your app that uses the\nApp Check debug provider instead of a real attestation provider.\n| **Warning:** The debug provider allows access to your Firebase resources from unverified devices. **Don't** use the debug provider in production builds of your app, and **don't** share your debug builds with untrusted parties.\n\nUse the debug provider on localhost\n\nTo use the debug provider while running your app from `localhost` (during\ndevelopment, for example), do the following:\n| **Warning:** *Do not* try to enable `localhost` debugging by adding `localhost` to reCAPTCHA's allowed domains. Doing so would allow anyone to run your app from their local machines!\n\n1. In your debug build, enable debug mode by setting\n `self.FIREBASE_APPCHECK_DEBUG_TOKEN` to `true` before you initialize\n App Check. For example:\n\n Web \n\n self.FIREBASE_APPCHECK_DEBUG_TOKEN = true;\n initializeAppCheck(app, { /* App Check options */ });\n\n Web \n\n self.FIREBASE_APPCHECK_DEBUG_TOKEN = true;\n firebase.appCheck().activate(/* site key or provider */);\n\n | **Note:** In Firebase Web SDK versions before v9, `self.FIREBASE_APPCHECK_DEBUG_TOKEN` is read at import time, and not at initialization/activation time. This required it to be set in `index.html` before the code bundle is loaded. To avoid this restriction, upgrade to v9.\n2. Visit your web app locally and open the browser's developer tool. In the\n debug console, you'll see a debug token:\n\n ```\n AppCheck debug token: \"123a4567-b89c-12d3-e456-789012345678\". You will\n need to safelist it in the Firebase console for it to work.\n ```\n3. In the [**App Check**](//console.firebase.google.com/project/_/appcheck) section\n of the Firebase console, choose **Manage debug tokens** from your app's\n overflow menu. Then, register the debug token you logged in the previous\n step.\n\nAfter you register the token, Firebase backend services will accept it as valid.\n\nBecause this token allows access to your Firebase resources without a\nvalid device, it is crucial that you keep it private. Don't commit it to a\npublic repository, and if a registered token is ever compromised, revoke it\nimmediately in the Firebase console.\n\nThis token is stored locally in your browser and will be used whenever you use\nyour app in the same browser on the same machine. If you want to use the\ntoken in another browser or on another machine, set\n`self.FIREBASE_APPCHECK_DEBUG_TOKEN` to the token string instead of `true`.\n\nUse the debug provider in a CI environment\n\nTo use the debug provider in a continuous integration (CI) environment, do the following:\n\n1. In the [**App Check**](//console.firebase.google.com/project/_/appcheck) section\n of the Firebase console, choose **Manage debug tokens** from your app's\n overflow menu. Then, create a new debug token. You'll need the token in the\n next step.\n\n Because this token allows access to your Firebase resources without\n a valid device, it is crucial that you keep it private. Don't commit it to a\n public repository, and if a registered token is ever compromised, revoke it\n immediately in the Firebase console.\n\n2. Add the debug token you just created to your CI system's secure key store\n (for example, GitHub Actions' [encrypted secrets](https://docs.github.com/en/actions/reference/encrypted-secrets)\n or Travis CI's [encrypted variables](https://docs.travis-ci.com/user/environment-variables/#defining-encrypted-variables-in-travisyml)).\n\n3. If necessary, configure your CI system to make your debug token available\n within the CI environment as an environment variable. Name the variable\n something like `APP_CHECK_DEBUG_TOKEN_FROM_CI`.\n\n4. In your debug build, enable debug mode by setting\n `self.FIREBASE_APPCHECK_DEBUG_TOKEN` to the value of the debug token\n environment variable before you import App Check. For example:\n\n Web \n\n self.FIREBASE_APPCHECK_DEBUG_TOKEN = process.env.APP_CHECK_DEBUG_TOKEN_FROM_CI;\n initializeAppCheck(app, { /* App Check options */ });\n\n Web \n\n self.FIREBASE_APPCHECK_DEBUG_TOKEN = process.env.APP_CHECK_DEBUG_TOKEN_FROM_CI;\n firebase.appCheck().activate(/* site key or provider */);\n\nWhen your app runs in a CI environment, Firebase backend services will accept\nthe token it sends as valid."]]
