title: On load Set value for sweet alert input
body: <p>In sweet alert 2, How on load to set value in input 
  my sweet alert code</p>
  
  <pre><code>swal({
                title: 'Are you sure?',
                text: "You are going to send emails from the system. Please confirm",                   
                showCancelButton: true,
                input: 'email',
  
                confirmButtonText: 'Submit',
                confirmButtonColor: '#4aa0f1',
                cancelButtonColor: '#898b8e',
                confirmButtonText: 'Send'
              }).then(function (email) {  
                  send_email = email;
                  sentHtmtBody_send();
                  loadingIcon();
              });
  </code></pre>