Thêm input vào form bằng lệnh Javascript

// Google's OAuth 2.0 endpoint for requesting an access token

  var url_submit= 'https://xxxx';



  // Tạo thẻ <form>

  var form = document.createElement('form');

  form.setAttribute('method', 'GET'); 

  form.setAttribute('action', url_submit);



  // Parameters to pass to OAuth 2.0 endpoint.

  var params = {'client_id': 'abc',

                'redirect_uri': 'https://iif.vn',

                'response_type': 'token',

                'scope': 'https://www.googleapis.com/auth/drive.metadata.readonly',

                'include_granted_scopes': 'true',

                'state': 'pass-through value'};





  // Add form parameters as hidden input values.

  for (var p in params) {



    var input = document.createElement('input');

    input.setAttribute('type', 'hidden');

    input.setAttribute('name', p);

    input.setAttribute('value', params[p]);

    form.appendChild(input);

  }

  document.body.appendChild(form);