SendGrid_NodeTemplateExample.js

const SENDGRID_API_KEY = 'INSERT API KEY HERE'
const MY_TEMPLATE_ID = 'INSERT TEMPLATE ID HERE'

var sendgrid = require('sendgrid')(process.env.SENDGRID_API_KEY)

// Note the html parameter - you must have this set or you'll get an error about having no
// body set
var email = new sendgrid.Email({
    from: 'sentfrom@yourdomain.com',
    to: 'my.user@theirdomain.com',
    html: '<p></p>',
    subject: 'Password reset for Mish Guru'
  })

const host = 'https://mydomain.com'
const resetToken = 'sdfdsf-wer234w-csdfrfq3r-sdcs'

email.addSubstitution('%name%', 'John')
email.addSubstitution('%reset_url%', `${host}/reset_password?token=${resetToken}`)

email.addFilter('templates', 'enable', 1)
email.addFilter('templates', 'template_id', MY_TEMPLATE_ID)

sendgrid.send(email, (err, response) => {
  if (err) {
    console.log(err)
  } else {
    console.log('Yay! Our templated email has been sent')
  }
})