[2024 Update] Build ChatBot with Node.js, React, and ChatGPT
In this tutorial, we will learn how to build a ChatBot using Node.js, React, and ChatGPT. ChatGPT is a state-of-the-art language model developed by OpenAI that can generate human-like responses to user inputs. By combining ChatGPT with Node.js for the backend and React for the frontend, we can create a powerful and intelligent ChatBot.
Prerequisites
Before we get started, make sure you have the following prerequisites:
- Basic knowledge of Node.js and React
- Node.js installed on your machine
- A code editor like Visual Studio Code
Step 1: Setting up the Node.js backend
First, we need to set up the Node.js backend for our ChatBot. Create a new Node.js project and install the necessary dependencies using npm. You can use the following commands:
npm init -y
npm install express axios
Next, create a new file named server.js and write the following code:
// server.js
const express = require('express');
const axios = require('axios');
const app = express();
const PORT = 3000;
app.use(express.json());
app.post('/message', async (req, res) => {
const { message } = req.body;
// Make a request to ChatGPT API to get response
const response = await axios.post('https://api.openai.com/v1/engines/davinci/completions', {
prompt: message,
max_tokens: 100,
}, {
headers: {
'Authorization': 'Bearer YOUR_OPENAI_API_KEY'
}
});
res.json({ response: response.data.choices[0].text });
});
app.listen(PORT, () => {
console.log(`Server running on port ${PORT}`);
});
Replace YOUR_OPENAI_API_KEY with your actual API key from OpenAI. This backend server will handle incoming messages from the frontend, send them to the ChatGPT API, and return the generated response.
Step 2: Creating the React frontend
Now, let’s create the React frontend for our ChatBot. Create a new React project and install the necessary dependencies using npm. You can use the following commands:
npx create-react-app chatbot
cd chatbot
npm install axios
Next, update the App.js file with the following code:
// App.js
import React, { useState } from 'react';
import axios from 'axios';
const App = () => {
const [message, setMessage] = useState('');
const [response, setResponse] = useState('');
const handleMessage = async () => {
const res = await axios.post('http://localhost:3000/message', { message });
setResponse(res.data.response);
setMessage('');
};
return (
{response}
);
};
export default App;
This React component will allow users to type a message, send it to the backend server, and display the generated response. Make sure to start the Node.js server first before running the React app.
Step 3: Testing the ChatBot
Now that we have set up both the backend and frontend, we can test our ChatBot. Start the Node.js server by running node server.js and start the React app by running npm start. Open your browser and navigate to http://localhost:3000 to interact with your ChatBot.
Congratulations! You have successfully built a ChatBot using Node.js, React, and ChatGPT. Feel free to customize and enhance the ChatBot further to suit your needs.
