Hướng dẫn làm chức năng đăng nhập nhanh bằng Google (vieclam123.vn)

https://apis.google.com/js/client:platform.js?onload=renderButton

<script src="https://apis.google.com/js/client:platform.js?onload=renderButton" async defer></script>
<meta name="google-signin-client_id" content="649705834949-7gbh9iv72v8ug33210002fl8mhbkeie8.apps.googleusercontent.com">
<!DOCTYPE html>
<html lang="en" dir="ltr">

<head>
  <meta charset="utf-8">
  <title></title>
</head>

<body>
  <!-- Display Google sign-in button -->
  <div id="gSignIn"></div>
  <!-- Show the user profile details -->
  <div class="userContent" style="display: none;"></div>
</body>

</html>
<script>
// Render Google Sign-in button
function renderButton() {
  gapi.signin2.render('gSignIn', {
    'scope': 'profile email',
    'width': 240,
    'height': 50,
    'longtitle': true,
    'theme': 'dark',
    'onsuccess': onSuccess,
    'onfailure': onFailure
  });
}
// Sign-in success callback
function onSuccess(googleUser) {
  // Get the Google profile data (basic)
  //var profile = googleUser.getBasicProfile();
  // Retrieve the Google account data
  gapi.client.load('oauth2', 'v2', function() {
    var request = gapi.client.oauth2.userinfo.get({
      'userId': 'me'
    });
    request.execute(function(resp) {
      // Display the user details
      var profileHTML = '<h3>Welcome ' + resp.given_name + '! <a href="javascript:void(0);" onclick="signOut();">Sign out</a></h3>';
      profileHTML += '<img src="' + resp.picture + '"/><p><b>Google ID: </b>' + resp.id + '</p><p><b>Name: </b>' + resp.name + '</p><p><b>Email: </b>' + resp.email + '</p><p><b>Gender: </b>' + resp.gender + '</p><p><b>Locale: </b>' + resp.locale + '</p><p><b>Google Profile:</b> <a target="_blank" href="' + resp.link + '">click to view profile</a></p>';
      document.getElementsByClassName("userContent")[0].innerHTML = profileHTML;
      document.getElementById("gSignIn").style.display = "none";
      document.getElementsByClassName("userContent")[0].style.display = "block";
    });
  });
}
// Sign-in failure callback
function onFailure(error) {
  alert(error);
}
// Sign out the user
function signOut() {
  var auth2 = gapi.auth2.getAuthInstance();
  auth2.signOut().then(function() {
    document.getElementsByClassName("userContent")[0].innerHTML = '';
    document.getElementsByClassName("userContent")[0].style.display = "none";
    document.getElementById("gSignIn").style.display = "block";
  });
  auth2.disconnect();
}
</script>
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