How make template for merged mail

A merged mail template is a document that combines data from a database or a spreadsheet with a pre-designed layout to create a personalized email or document. Here's a step-by-step guide to create a template for merged mail:

Choose a template engine

There are several template engines available, such as:

Mustache: A popular template engine for JavaScript and Node.js.
Handlebars: A template engine for JavaScript and Node.js.
Liquid: A template engine for Ruby and Ruby on Rails.
Jinja2: A template engine for Python.

For this example, we'll use Mustache.

Create a template file

Create a new file with a .mustache extension (e.g., merged_mail.mustache). This file will contain the template layout and placeholders for the data.

Define placeholders

In the template file, define placeholders for the data using double curly braces {{ }}. For example:

Hello {{ name }}!

You have {{ num_orders }} orders pending.

Best regards,
{{ company_name }}

Create a data source

Create a data source that contains the data to be merged with the template. This can be a CSV file, a JSON file, or a database query.

Use a template engine to merge data

Use the chosen template engine to merge the data with the template file. For example, using Mustache:

const Mustache = require('mustache');
const data = {
  name: 'John Doe',
  num_orders: 3,
  company_name: 'ABC Inc.'
};

const template = Mustache.compile('merged_mail.mustache');
const output = template.render(data);

console.log(output);

This will output the merged mail:

Hello John Doe!

You have 3 orders pending.

Best regards,
ABC Inc.

Tips and variations

Use conditional statements (e.g., {{#if condition}}) to control the display of content based on conditions.
Use loops (e.g., {{#each array}}) to iterate over arrays or objects.
Use functions (e.g., {{fn()}}) to perform calculations or formatting.
Use inline templates (e.g., {{> partial }}) to include partial templates.
Use a templating language like Liquid or Jinja2 for more advanced features.

Example with a Node.js server

Here's an example of how you can create a Node.js server that uses Mustache to merge data with a template:

const express = require('express');
const app = express();
const Mustache = require('mustache');

app.get('/merged-mail', (req, res) => {
  const data = {
    name: 'John Doe',
    num_orders: 3,
    company_name: 'ABC Inc.'
  };

  const template = Mustache.compile('merged_mail.mustache');
  const output = template.render(data);

  res.send(output);
});

app.listen(3000, () => {
  console.log('Server started on port 3000');
});

This server listens on port 3000 and responds to GET requests with the merged mail template. You can test it by visiting http://localhost:3000/merged-mail in your browser.

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How make template for merged mail