@greendeck/preview-email NPM

preview-email

Automatically opens your browser to preview Node.js email messages sent with Nodemailer. Made for Lad!

Screenshot
Install
Usage
Custom Preview Template and Stylesheets
Debugging
Options
Contributors
License

Screenshot

demo screenshot

Install

npm install preview-email

yarn:

yarn add preview-email

Usage

NOTE: You should probably just use email-templates directly instead of using this package.

The function previewEmail returns a Promise which resolves with a URL. We automatically open the browser to this URL unless you specify options.open as false (see Options for more info).

const previewEmail = require('preview-email');
const nodemailer = require('nodemailer');

const transport = nodemailer.createTransport({
  jsonTransport: true
});

// <https://nodemailer.com/message/>
const message = {
  from: 'niftylettuce+from@gmail.com',
  to: 'niftylettuce+to@gmail.com',
  subject: 'Hello world',
  html: '<p>Hello world</p>',
  text: 'Hello world',
  attachments: [ { filename: 'hello-world.txt', content: 'Hello world' } ]
};

// note that `attachments` will not be parsed unless you use
// `previewEmail` with the results of `transport.sendMail`
// e.g. `previewEmail(JSON.parse(res.message));` where `res`
// is `const res = await transport.sendMail(message);`
previewEmail(message).then(console.log).catch(console.error);

transport.sendMail(message).then(console.log).catch(console.error);

Custom Preview Template and Stylesheets

Using the options.template object, you can define your own template for rendering (e.g. get inspiration from template.pug and write your own!):

const path = require('path');

// ...

previewEmail(message, { template: path.join(__dirname, 'my-custom-preview-template.pug') })
  .then(console.log)
  .catch(console.error);

Debugging

Thanks to the debug package, you can easily debug output from preview-email:

DEBUG=preview-email node app.js

Options

message (Object) - a Nodemailer message configuration object
options (Object) - an object with the following two properties:
- id (String) - a unique ID for the file name created for the preview in dir (defaults to uuid.v4() from uuid)
- dir (String) - a path to a directory for saving the generated email previews (defaults to os.tmpdir(), see os docs for more insight)
- open (Object or Boolean) - an options object that is passed to open (defaults to { wait: false }) - if set to false then it will not open the email automatically in the browser using open, and if set to true then it will default to { wait: false }
- template (String) - a file path to a pug template file (defaults to preview-email's template.pug by default) - this is where you can pass a custom template for rendering email previews, e.g. your own stylesheet
- urlTransform (Function (path) => url) - a function to build preview url from file path (defaults to (path) => 'file://[file path]') - this is where you can customize the opened path to handle WSL to Windows transformation or build a http url if dir is served.