Today, I will share with you the logic behind email sending in MERN App. Send Emails with Node.js & React Js.
How to MAKE an Email Send API in Nodejs
We can send emails using Nodejs but for the front-end, we required any front-end technology like VueJs, AnuglarJs, or Reaactjs. So I am using Reactjs for client-side applications. You can use pure HTML too for getting form input.
Before going ahead you must disable Gmail Third-Party security otherwise You request will not send from your MERN App to Gmail
You need some packages for running MERN App in your System. You can install React and node from their respective official website.
Lets talk about Front-end part ( React JS )
I am using bootstrap to design the form you can use material UI or normal HTML Form. To Install bootstrap in your react app use the below command.
npm install bootstrap --save
I am using AXIOS for sending React form data to Nodejs. You can use fetch()
npm install axios or // using yarn yarn add axios
Learn about AXIOS and FETCH – Differences between Axios and fetch
Now We will see Node Part here
In Node js, You will have to install some packages
"cors": "^2.8.5",
"express": "^4.17.1",
"nodemailer": "^6.6.3",
"path": "^0.12.7"
Installing nodemailer from npm
With the npm CLI: npm install nodemailer
With the yarn CLI: yarn add nodemailer
CORS and Nodemailer both are very important. Without Nodemailer You can not send mail. You must install cors in your node app. cors is important for API otherwise you will get an error in your Front-end app. See the below image of CORS errors.
Learn more about Nodemailer https://www.w3schools.com/nodejs/nodejs_email.asp
Coding Part :
Now We will see REACT code first here
src/EmailSend.js
import React, { useState } from "react";
import axios from 'axios'
const EmailSend = () => {
const [msg,setMsg] = useState('');
const [user, setUser] = useState({
to: "",
subject: "",
description: ""
});
const { to, subject, description} = user;
const onInputChange = e => {
setUser({ ...user, [e.target.name]: e.target.value });
};
const onSubmit = async e => {
e.preventDefault();
await axios.post("http://localhost:5000/users/",user)
.then(response => setMsg(response.data.respMesg));
};
return (
<div className="container">
<h3 className="text-center text-success mb-2 mt-4">Email Send using React and Node </h3>
<h6 className="text-secondary text-center mb-4 mt-1">By Improve Programming Logic</h6>
<div class="row">
<div className="col-sm-4 mx-auto shadow p-5">
<h4 className="text-center mb-2">Send E Mail </h4>
<p class="mb-3 mt-2" style={{color:"green",marginLeft:"57px"}}><b>{msg}</b></p>
<div className="form-group mb-3">
<input
type="text"
className="form-control form-control-lg"
placeholder="To"
name="to"
onChange={onInputChange}
value={user.to}
/>
</div>
<div className="form-group mb-4 ">
<input
type="text"
className="form-control form-control-lg"
placeholder="Subject"
name="subject"
onChange={onInputChange}
value={subject}
/>
</div>
<div className="form-group mb-4">
<textarea
type="text"
className="form-control form-control-lg"
placeholder="Description"
name="description"
onChange={onInputChange}
value={description}
/>
</div>
<button onClick={onSubmit} className="btn btn-primary btn-block " style={{marginLeft:"100px"}}>Send Mail</button>
</div>
</div>
</div>
);
};
export default EmailSend;
Now call the EmailSend file in App.js
src/App.js
import React from "react";
import "./App.css";
import "../node_modules/bootstrap/dist/css/bootstrap.css";
import EmailSend from "./EmailSend";
function App(props) {
return (
<div className="App">
<EmailSend />
</div>
);
}
export default App;
By default, your react app will run on port number 3000
http://localhost:3000/
But You can change your PORT number in the package.json file using this simple code of line
"scripts": {
"start": "set PORT= 3005 && react-scripts start",
"build": "react-scripts build",
"test": "react-scripts test",
"eject": "react-scripts eject"
},
Now Nodejs Code starts here
index.js file is my main file you can change its name according to your choice
index.js
const path = require('path');
const express = require('express');
const nodemailer = require('nodemailer');
const app = express();
const cors = require('cors')
app.use(cors())
const buildPath = path.join(__dirname, '..', 'build');
app.use(express.json());
app.use(express.static(buildPath));
app.post('/users',(req,res)=>{
var transporter = nodemailer.createTransport({
service: 'gmail',
auth: {
user: 'your mail',
pass: 'password'
}
});
var mailOptions = {
from: 'your mail',// sender address
to: req.body.to, // list of receivers
subject: req.body.subject, // Subject line
text:req.body.description,
html: `
<div style="padding:10px;border-style: ridge">
<p>You have a new contact request.</p>
<h3>Contact Details</h3>
<ul>
<li>Email: ${req.body.to}</li>
<li>Subject: ${req.body.subject}</li>
<li>Message: ${req.body.description}</li>
</ul>
`
};
transporter.sendMail(mailOptions, function(error, info){
if (error)
{
res.json({status: true, respMesg: 'Email Sent Successfully'})
}
else
{
res.json({status: true, respMesg: 'Email Sent Successfully'})
}
});
});
// listen to the port
app.listen(5000, () => {
console.log('server start on port 3030');
});
I am running the Node project on 5000 but you can use a different port.
http://localhost:5000/
For Source Code drop me a mail: dysengg252@gmail.com
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