gistfile1.txt

/* @flow */
import getDocument from 'shared/utils/get-document';

export default function submitGoogleForm(fields, mapper, googleFormId='google-form') {
  const document = getDocument();
  const formData = Object.keys(mapper).reduce((data, key) => {
    data[mapper[key]] = fields[key];
    return data;
  }, {});

  const googleForm = document.getElementById(googleFormId);
  if (googleForm === null) {
    throw new Error('You must have an embedded iframe with your Google Form');
  }

  const form = document.createElement('form');
  form.action = googleForm.src.replace('viewform', 'formResponse');
  form.method = 'POST';
  form.target = googleFormId;
  form.style = 'display: none';

  Object.keys(formData).forEach(key => {
    let field = document.createElement('input');
    field.name = key;
    field.value = formData[key];
    form.appendChild(field);
  });

  document.body.appendChild(form);
  form.submit();
  document.body.removeChild(form);
}