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I'd like to use Google One Tap in my Angular 11 app. Following the documentation I added <script async defer src="https://accounts.google.com/gsi/client"></script> to my html and then used the following code in my app.component.html:
<div id="g_id_onload"
data-client_id="MY_GOOGLE_CLIENT_ID"
data-callback="handleCredentialResponse",
data-cancel_on_tap_outside="false">
</div>
The popup works fine, though I can't seem to log in. If I create a function handleCredentialResponse in app.component.ts, I get the following error: [GSI_LOGGER]: The value of 'callback' is not a function. Configuration ignored.
If I instead try to use the JavaScript API, Typescript throws the following error: Property 'accounts' does not exist on type 'typeof google'
What should I do to be able to using Google One Tap in Angular?
554
I had a similar problem when I used the HTML API approach, so I ended up using the JavaScript API instead.
Here's what I did:
First, make sure to install the @types/google-one-tap package.
As you mentioned, I'm also importing the script in my index.html file, like so:
<body>
<script src="https://accounts.google.com/gsi/client" async defer></script>
<app-root></app-root>
</body>
Now, moving on to your main component which in my case is app.component.ts, import the following first:
import { CredentialResponse, PromptMomentNotification } from 'google-one-tap';
Then, you can add this on the ngOnInit(). Make sure to read the documentation to get more details on the onGoogleLibraryLoad event:
// @ts-ignore
window.onGoogleLibraryLoad = () => {
console.log('Google\'s One-tap sign in script loaded!');
// @ts-ignore
google.accounts.id.initialize({
// Ref: https://developers.google.com/identity/gsi/web/reference/js-reference#IdConfiguration
client_id: 'XXXXXXXX',
callback: this.handleCredentialResponse.bind(this), // Whatever function you want to trigger...
auto_select: true,
cancel_on_tap_outside: false
});
// OPTIONAL: In my case I want to redirect the user to an specific path.
// @ts-ignore
google.accounts.id.prompt((notification: PromptMomentNotification) => {
console.log('Google prompt event triggered...');
if (notification.getDismissedReason() === 'credential_returned') {
this.ngZone.run(() => {
this.router.navigate(['myapp/somewhere'], { replaceUrl: true });
console.log('Welcome back!');
});
}
});
};
Then, the handleCredentialResponse function is where you handle the actual response with the user's credential. In my case, I wanted to decode it first. Check this out to get more details on how the credential looks once it has been decoded: https://developers.google.com/identity/gsi/web/reference/js-reference#credential
handleCredentialResponse(response: CredentialResponse) {
// Decoding JWT token...
let decodedToken: any | null = null;
try {
decodedToken = JSON.parse(atob(response?.credential.split('.')[1]));
} catch (e) {
console.error('Error while trying to decode token', e);
}
console.log('decodedToken', decodedToken);
}
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