Call this method when you are ready to submit the data in the fields. This method returns a Promise that you can await or you can pass in a callback. The callback will be invoked when the field data has been submitted successfully or there was an error. Once the data is submitted successfully, you are ready to finish the payment on your server. 
window.confidoHostedFields.submitFields(callback: SubmitFieldsCallback);

​
Example with Promise

const handleSubmit = () => {
  try {
    await window.confidoHostedFields.submitFields();
    // the fields were submitted successfully
  } catch (error) {
    // do something to show the error
  }
};

​
Example with callback

const handleSubmit = () => {
  window.confidoHostedFields.submitFields((error) => {
    if (error) {
      // do something to show the error
      return;
    }

    // else the fields were submitted successfully
  });
};