javascript - HTML PHP google single sign on signout will throw "Cannot read property 'getAuthInstance' of undefined" -
i have created google single sign on following steps mentioned in https://developers.google.com/identity/sign-in/web/sign-in
the sign in works charm when try integrate sign out per article in link
i following javascript error in console
uncaught typeerror: cannot read property 'getauthinstance' of undefined
and signout function looks like
<script> function signout() { var auth2 = gapi.auth2.getauthinstance(); auth2.signout().then(function () { console.log('user signed out.'); }); } </script> and sign in looks
function onsignin(googleuser) { var profile = googleuser.getbasicprofile(); console.log('id: ' + profile.getid()); console.log('name: ' + profile.getname()); console.log('image url: ' + profile.getimageurl()); console.log('email: ' + profile.getemail()); }
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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