Cotter + Brev React Starter App

This project was bootstrapped with Create React App, with additional templates:

Build a full app with authentication in ~10 minutes

• Pre-built Login Pages using Cotter
• Authentication State Management
• User Management
• Backend and database using Brev
• Step-by-step guide

---

Getting started

Run the project

To run the project:

npm install
# or
yarn

then run

npm start
# or
yarn start

and open http://localhost:3000

Copy your Cotter API KEY ID

Go to Cotter's Dashboard, create a project, and copy your API KEY ID. Then paste your API Key ID to src/apiKeys.js.

Follow the tutorial on the home page

Try logging-in and then add API Endpoints using Brev following this guide.

Available Functions

As you can see, we've already included CotterProvider for authentication state management. It's already included in pages/_app to wrap over your root component.

• Adding the LoginForm
• Using the CotterProvider

Adding the LoginForm

The LoginForm component automatically sends a verification email or SMS to the entered email or phone number, and respond with the results.

To use the LoginForm component, you can import LoginForm and do the following:

<LoginFormtype="EMAIL"// - EMAIL or PHONEauthMethod="MAGIC_LINK"// - OTP or MAGIC_LINKonBegin={onSignupBegin}// - A function that runs before verification email/SMS is sentonSuccess={onSignupSuccess}// - A function that runs after the login/signup is successfulonError={onSignupError}// - A function that runs if the login/signup encountered an errorwidth={340}// - Width & height of the formheight={300}// Recommended at least 300x300additionalFields={[// - The form includes 1 field for email/phone. Use this to add{// more fields.name: "name",label: "Full Name",placeholder: "Enter your full name",},]}styles={loginFormStyles}// - You can style the form on Cotter's Dashboard or pass in CSS here./>

onBegin function:

The onBegin function receives the user entered fields as a parameter.

• To stop submission and display an error, return a string with the error message.
• To continue submission with no error, return null. Learn more about onBegin function

For example:

constmyOnBeginFunction=(payload)=>{if(payload.identifier==="myemail@gmail.com"){// If there's an error, return a string with the error messagereturn"Phone Number is not allowed";}// If there's no error, return nullreturnnull;}// Payload object looks like thisvarpayload={identifier: "myemail@gmail.com",identifier_type: "PHONE",device_type: "BROWSER",device_name: "Chrome ...",client_json: {// This is available if you set up AdditionalFields"name": "Hello World","address": "Street Address"}};

onSuccess function:

When the user successfully login or sign up, the onSuccess function will receive a response from Cotter that includes the user-entered fields an a JWT token to validate the user successfully verified their email or phone number. Learn more about onSuccess function

For example:

constonSuccessFunc=(payload)=>{// Send data to Serveraxios.post("https://slug.brev.dev/login",payload).then((resp)=>console.log("Response From Server",resp)).catch((err)=>console.log(err));}// Payload object looks like this:varpayload{"email": "myemail@gmail.com",// User's email (or phone number),"name": "Hello World","address": "Street Address","oauth_token": {"access_token": "eyJhbGciOiJFUzI1NiIsImt...",// Access Token to validate"id_token": "eyJhbGciOiJFUzI1Ni...","refresh_token": "27805:CNf76faa8trMhjXM...","expires_in": 3600,"token_type": "Bearer","auth_method": "OTP"},"user": {"ID": "abcdefgh-abcd-abcd-abcd-af6f81fb5432",// Cotter User ID"issuer": "<YOUR_API_KEY_ID>","identifier": "myemail@gmail.com"}}

onError function:

When there's an error, the onError function will be invoked. The error returned may differ based on the error, you should display an error message when this is invoked, and try it in console.log to see the error responses.

additionalFields: The default form includes 1 field which is the email input or phone number input. If you want to collect more information, use this to add more fields. For example:

constadditionalFields=[{label: "Full Name",name: "name",placeholder: "Enter your full name"},{label: "Address",name: "address",placeholder: "Enter your address"},{label: "Prefilled Info",name: "prefilled",type: "hidden",// availabe types are the same as HTML input type.initial_value: "autofill value"}]

styles:

There are 2 ways to style your login form.

• Customize the form from the Cotter Dashboard
• Pass in a styles object

To pass in a styles object, you can find each component's class name using inspect element, then add the style for each class name like the following:

conststyles={input_label: {fontFamily: "Roboto",fontSize: 15,color: "red",fontWeight: 700,},input_text_container_default: {backgroundColor: "#fce883",padding: "20px 60px",},input_text: {backgroundColor: "#fce883",fontFamily: "Roboto",fontSize: 20,},button_container: {borderRadius: 0,},button_text: {color: "aqua",},}

Using the CotterProvider

The CotterProvider provides you with useful authentication state and the current user information. To use it:

const{ isLoading, isLoggedIn, user, logout, getCotter, apiKeyID, checkLoggedIn }=useContext(CotterContext);

• isLoading (bool): tells you if the CotterProvider is loading the necessary data
• isLoggedIn (bool): tells you if the user is logged-in or not
• user (object): gives you the user object of the currently logged-in user

constuser={"ID": "abcdefgh-abcd-abcd-abcd-67ebae3cdfcf","issuer": "abcdefgh-abcd-abcd-abcd-5cc8b69051e8","client_user_id": "abcdefgh-abcd-abcd-abcd-67ebae3cdfcf","enrolled": ["WEBAUTHN"],"identifier": "putri@cotter.app"}

• logout (async function): a function to logout the user

<divonClick={logout}>Log Out</div>

• getCotter (function): a function to get the Cotter object. Check out the docs on what you can do with the Cotter object.
• apiKeyID (string): your API KEY ID that you passed-in to the CotterProvider
• checkLoggedIn (async function): a function to force the CotterProvider to check if the user's logged-in

---

Create React App

Available Scripts

In the project directory, you can run:

yarn start

Runs the app in the development mode.
Open http://localhost:3000 to view it in the browser.

The page will reload if you make edits.
You will also see any lint errors in the console.

yarn test

Launches the test runner in the interactive watch mode.
See the section about running tests for more information.

yarn build

Builds the app for production to the build folder.
It correctly bundles React in production mode and optimizes the build for the best performance.

The build is minified and the filenames include the hashes.
Your app is ready to be deployed!

See the section about deployment for more information.

yarn eject

Note: this is a one-way operation. Once you eject, you can’t go back!

If you aren’t satisfied with the build tool and configuration choices, you can eject at any time. This command will remove the single build dependency from your project.

Instead, it will copy all the configuration files and the transitive dependencies (webpack, Babel, ESLint, etc) right into your project so you have full control over them. All of the commands except eject will still work, but they will point to the copied scripts so you can tweak them. At this point you’re on your own.

You don’t have to ever use eject. The curated feature set is suitable for small and middle deployments, and you shouldn’t feel obligated to use this feature. However we understand that this tool wouldn’t be useful if you couldn’t customize it when you are ready for it.

Learn More

You can learn more in the Create React App documentation.

To learn React, check out the React documentation.

Code Splitting

This section has moved here: https://facebook.github.io/create-react-app/docs/code-splitting

Analyzing the Bundle Size

This section has moved here: https://facebook.github.io/create-react-app/docs/analyzing-the-bundle-size

Making a Progressive Web App

This section has moved here: https://facebook.github.io/create-react-app/docs/making-a-progressive-web-app

Advanced Configuration

This section has moved here: https://facebook.github.io/create-react-app/docs/advanced-configuration

Deployment

This section has moved here: https://facebook.github.io/create-react-app/docs/deployment

yarn build fails to minify

This section has moved here: https://facebook.github.io/create-react-app/docs/troubleshooting#npm-run-build-fails-to-minify