resend / resend-express-example

This example shows how to use Resend with Express

Resend with Express

This example shows how to use Resend with Express.

Prerequisites

To get the most out of this guide, you’ll need to:

• Create an API key
• Verify your domain

Instructions

1. Define environment variables in .env file.

2. Install dependencies:

npm install
# or
yarn

3. Run Express locally:

npm run dev

4. Open URL in the browser:

http://localhost:3000

License

MIT License

resend-express-example's Issues

Dependency Dashboard

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• fix(deps): update dependency express to v4.19.2 [security]
• fix(deps): update dependency dotenv to v16.4.5
• chore(deps): update dependency @types/node to v20.14.15
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Detected dependencies

npm

package.json

• dotenv 16.4.4
• express 4.18.2
• @types/node 20.11.19

---

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Getting error "Headers is not defined" when calling Resend constructor (not backwards compatible from Node 18)

Im trying to setup Resend in an express project that is on Node version 17

Im on the latest version of Resend v2.0.0

When running the project I get an error saying:

"ReferenceError: Headers is not defined",
" at new Resend (/var/task/node_modules/resend/build/src/resend.js:34:28)",

The line referenced begins here:
... this.headers = new Headers({ Authorization: Bearer ${this.key}, 'User-Agent': userAgent, 'Content-Type': 'application/json', }); ...

where you're using the Headers interface of the fetch API. Unfortunately this is only supported in Node version 18 and greater. I don't think I saw anything in your documentation while getting setup that Node version 18 was a requirement. Will you ever offer some sort of backward compatibility?

When I clone this resend-express-example project I don't see this error, but it looks like the Resend version that gets downloaded is version 0.17.1 where the Headers interface isn't being used. What version was this implemented? Is it recommended that I roll back instead of waiting for support in the latest version?

There are lots of mistakes

1. in pakage.json script says node index.js and that file doesnt even exist
2. in pakage.json we should use type module because it allows to use import statements instead of const require
   Resend works only with import not with const require statements
   3)const resend = new Resend('re_123456789'); process.env.RESEND_API_KEY should be used here