React-use-heroku NPM

react-use-heroku

Have you deployed any of your projects on Heroku's Free Plan? You definitely noticed your app sleeps after 30 minutes of inactivity. react-use-heroku is custom hook that fetchs an endpoint on your server to wake up heroku. At this point, render a loading message, once successful, load your app.

🚨Note: This package doesn't ping heroku every 30 minutes to wake it up. All this hook accomplishes, is preventing your application from rendering a blank screen initially, instead it will render loading text (or whatever else you wish) until the server is available.

Install

$ npm i react-use-heroku

$ yarn add react-use-heroku

Requirement

This package only works in versions of React that support Hooks.

Usage: Example Client

Parameters

You pass useHeroku an object with the following properties.

Key	Description
`url`	The endpoint to fetch in your api, to `wake-up` heroku

Returned

A boolean, true by default, will be set to false once the server is ready.

import React from 'react';
import useHeroku from 'react-use-heroku';

const url = 'https://.........herokuapp.com/wake-up';

const App = () => {
    const isHerokuLoading = useHeroku({ url });

    if (isHerokuLoading) return <div>Heroku is sleeping, hang tight..</div>;

    return (
        <div>
            Welcome to My React App
        </div>
    );
};

export default App;

Usage: Example Api

An extremely simple Express Server

const express = require('express');
const cors = require('cors');
const bodyParser = require('body-parser');
const http = require('http');
const logger = require('morgan');

const app = express();
const server = http.createServer(app);

const PORT = process.env.PORT || 4000;

// MIDDLEWARE
app.use(cors());
app.use(logger('tiny'));
app.use(bodyParser.urlencoded({ extended: false }));
app.use(bodyParser.json());

// THIS IS THE ENDPOINT WE ARE REQUESTING FROM OUR CLIENT TO WAKE-UP HEROKU
app.get('/wake-up', (_, res) => res.json({ status: 'Awake' }));

// START SERVER
server.listen(PORT, () => console.log(`Server listening on port ${PORT}`));