https://gist.github.com/heaversm/7334b6386e7060551830b4f3095e9366#file-react_to_google_sheets_form-js

React-to-Google-Sheets.jsx

//from: https://gist.github.com/heaversm/7334b6386e7060551830b4f3095e9366#file-react_to_google_sheets_form-js

import { Form, Text } from 'informed'; //https://joepuzzo.github.io/informed/
import React from 'react';

const SPREADSHEET_ID = 'nhlD3E6xsi2lbDQ71HTJ3oQ1Ql5dIkuiK4IoZYjHD'; //from the URL of your blank Google Sheet
const CLIENT_ID = '2d280542491u-3aofp4eFeftog7q0u5a73ro566h8vi.apps.googleusercontent.com'; //from https://console.developers.google.com/apis/credentials
const API_KEY = 'AIzaSyCz5fYFuCORKGXSGu4IwKq4U_HfcdDtB'; //https://console.developers.google.com/apis/credentials
const SCOPE = 'https://www.googleapis.com/auth/spreadsheets';

export default class ContactForm extends React.Component {

  constructor(props) {
    super(props);
    this.onFormSubmit = this.onFormSubmit.bind(this); //to tie the form's callback to this class
  }

  componentDidMount(){ //called automatically by React
    this.handleClientLoad(); 
  }

  handleClientLoad =()=> { //initialize the Google API
    gapi.load('client:auth2', this.initClient);
  }

  initClient =()=> { //provide the authentication credentials you set up in the Google developer console
    gapi.client.init({
      'apiKey': API_KEY,
      'clientId': CLIENT_ID,
      'scope': SCOPE,
      'discoveryDocs': ['https://sheets.googleapis.com/$discovery/rest?version=v4'],
    }).then(()=> {
      gapi.auth2.getAuthInstance().isSignedIn.listen(this.updateSignInStatus); //add a function called `updateSignInStatus` if you want to do something once a user is logged in with Google
      this.updateSignInStatus(gapi.auth2.getAuthInstance().isSignedIn.get());
    });
  }

  onFormSubmit(submissionValues) {

    const params = {
      // The ID of the spreadsheet to update.
      spreadsheetId: SPREADSHEET_ID, 
      // The A1 notation of a range to search for a logical table of data.Values will be appended after the last row of the table.
      range: 'Sheet1', //this is the default spreadsheet name, so unless you've changed it, or are submitting to multiple sheets, you can leave this
      // How the input data should be interpreted.
      valueInputOption: 'RAW', //RAW = if no conversion or formatting of submitted data is needed. Otherwise USER_ENTERED
      // How the input data should be inserted.
      insertDataOption: 'INSERT_ROWS', //Choose OVERWRITE OR INSERT_ROWS
    };

    const valueRangeBody = {
      'majorDimension': 'ROWS', //log each entry as a new row (vs column)
      'values': [submissionValues] //convert the object's values to an array
    };

    let request = gapi.client.sheets.spreadsheets.values.append(params, valueRangeBody);
    request.then(function (response) {
      // TODO: Insert desired response behaviour on submission
      console.log(response.result);
    }, function (reason) {
      console.error('error: ' + reason.result.error.message);
    });
  }

  render() {
    //TODO: add your form fields below that you want to submit to the sheet. This just has a name field
    return (
      <Form
        onSubmit={this.onFormSubmit}
      >
        <label>
          First name:
          <Text field='name' />
        </label>
        <button type='submit'>
          Submit
        </button>
      </Form>
    )
  }
}