preview-email
Advanced tools
Automatically opens your browser and iOS Simulator to preview Node.js email messages sent with Nodemailer. Made for Forward Email and Lad!
The preview-email npm package allows developers to preview email templates during development. It is particularly useful for testing and debugging email content before sending it to actual recipients.
Preview Email in Browser
This feature allows you to preview an email in the browser. The email object contains the necessary fields like 'from', 'to', 'subject', and 'html'. The previewEmail function generates a preview URL that you can open in your browser.
const previewEmail = require('preview-email');
const email = {
from: 'sender@example.com',
to: 'recipient@example.com',
subject: 'Test Email',
html: '<h1>Hello World</h1>'
};
previewEmail(email).then(console.log).catch(console.error);Custom Template Rendering
This feature allows you to use custom template engines like EJS to render dynamic email content. The rendered HTML is then passed to the previewEmail function for previewing.
const previewEmail = require('preview-email');
const ejs = require('ejs');
const emailTemplate = '<h1>Hello <%= name %></h1>';
const emailData = { name: 'John Doe' };
const emailHtml = ejs.render(emailTemplate, emailData);
const email = {
from: 'sender@example.com',
to: 'recipient@example.com',
subject: 'Personalized Email',
html: emailHtml
};
previewEmail(email).then(console.log).catch(console.error);Inline CSS
This feature allows you to inline CSS styles in your email HTML using the 'juice' library. The inlined HTML is then passed to the previewEmail function for previewing.
const previewEmail = require('preview-email');
const juice = require('juice');
const emailHtml = '<style>h1 { color: red; }</style><h1>Hello World</h1>';
const inlinedHtml = juice(emailHtml);
const email = {
from: 'sender@example.com',
to: 'recipient@example.com',
subject: 'Styled Email',
html: inlinedHtml
};
previewEmail(email).then(console.log).catch(console.error);Nodemailer is a module for Node.js applications to allow easy email sending. While it focuses on sending emails, it also provides a plugin system that can be used to preview emails. However, it is more complex and feature-rich compared to preview-email.
MailDev is a simple way to test email sending during development. It acts as a local SMTP server and web interface for viewing emails. Unlike preview-email, MailDev provides a full SMTP server and a web interface for viewing emails.
Email-templates is a Node.js module for rendering email templates. It supports various template engines and inline CSS. While it focuses on rendering and sending emails, it also provides a preview feature. It is more comprehensive compared to preview-email.
Automatically opens your browser and iOS Simulator to preview Node.js email messages sent with Nodemailer. Made for Forward Email Lad!
npm:
npm install preview-email
As of v3.0.6 we have built-in support for previewing emails in the iOS Simulator (in addition to rendering them in your default web browser).
This is only applicable if you are using macOS and if not running in a CI environment. If you wish to disable this default behavior, then set openSimulator to false in the options.
Otherwise you will need to install XCode from the App Store or Apple Developer Website. We have built-in friendly macOS notifications that will alert you if there are any issues while attempting to load the iOS Simulator.
After installing XCode, you will need to open it and agree to the terms and conditions. Then you will need to assign Command Line Tools.
Once the Simulator is opened – if you need to inspect the rendered email, then you can use the Web Inspector in Safari Developer Tools.
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);
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);
You can easily debug output from preview-email:
NODE_DEBUG=preview-email node app.js
message (Object) - a Nodemailer message configuration objectoptions (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 stylesheeturlTransform (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.openSimulator (Boolean) - whether or not to open the iOS Simulator with the preview url file path (defaults to true via process.env.NODE_ENV !== 'test' and will only run if macOS detected and not in a CI environment)| Name | Website |
|---|---|
| Nick Baugh | http://niftylettuce.com/ |
FAQs
Automatically opens your browser and iOS Simulator to preview Node.js email messages sent with Nodemailer. Made for Forward Email and Lad. Cross-browser and cross-platform email testing.
The npm package preview-email receives a total of 125,609 weekly downloads. As such, preview-email popularity was classified as popular.
We found that preview-email demonstrated a healthy version release cadence and project activity because the last version was released less than a year ago. It has 0 open source maintainers collaborating on the project.
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