​
1. Install dependencies

Get the @react-email/components package and the SendGrid Node.js SDK. 
npm install @sendgrid/mail @react-email/components

​
2. Create an email using React

Start by building your email template in a .jsx or .tsx file.
email.tsx
import * as React from "react";
import { Html, Button } from "@react-email/components";

export function Email(props) {
  const { url } = props;

  return (
    <Html lang="en">
      <Button href={url}>Click me</Button>
    </Html>
  );
}

​
3. Convert to HTML and send email

Import the email template you just built, convert into an HTML string, and use the SendGrid SDK to send it. 
import { render } from "@react-email/components";
import sendgrid from "@sendgrid/mail";
import { Email } from "./email";

sendgrid.setApiKey(process.env.SENDGRID_API_KEY);

const emailHtml = await render(<Email url="https://example.com" />);

const options = {
  from: "you@example.com",
  to: "user@gmail.com",
  subject: "hello world",
  html: emailHtml,
};

sendgrid.send(options);

​
Try it yourself

SendGrid example

See the full source code.