google openid - TypeError: gapi.auth2 undefined -


i went instructions integrating google sign-in:

https://developers.google.com/identity/sign-in/web/sign-in#specify_your_apps_client_id

sign-in works, sign-out gives javascript error in line:

var auth2 = gapi.auth2.getauthinstance();

the error is:

gapi.auth2 undefined

i include google platform library instructed:

    <script type='text/javascript' src='https://apis.google.com/js/platform.js' async defer></script>

why not work?

are signin , signout used on same page? div g-signin2 loads , inits gapi.auth2 should work long on same page.

in case signout on separate page, should manually load , init gapi.auth2 library.

full example (you have replace your_client_id actual client_id):

<html> <head>    <meta name="google-signin-client_id" content="your_client_id"> </head> <body>   <script>     function signout() {       var auth2 = gapi.auth2.getauthinstance();       auth2.signout().then(function () {         console.log('user signed out.');       });     }      function onload() {       gapi.load('auth2', function() {         gapi.auth2.init();       });     }   </script>   <a href="#" onclick="signout();">sign out</a>    <script src="https://apis.google.com/js/platform.js?onload=onload" async defer></script> </body> </html>

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