Sendgrid: Send email with template

Question

I am trying to send emails with SendGrid and am trying to have multiple templates for different cases. My function looks like this:

var file = "welcome.html"

sendgrid.send({
    to:      to,
    from:     from,
    subject:  subject,
    data: {
        //template vars go here
        email: to,
        confirmLink: confirmLink
    },
    template: "./" + file
}, function(err, json) {
    if (err) { return console.error(err); }
        console.log(json);
});

But when I am sending the email I get

[Error: Missing email body]

Would there be any way to attach html templates, since I don't want to have hard-coded strings with html content?

Edit

Reading and converting the file into a string works, but I am unsure how to pass in dynamic variables into the template..

Any suggestions?

Solution 1

I've looked into the source code and there is a way to pass in dynamic variables.

welcome.html

<p>Welcome %email%</p>

email.js

var file = "welcome.html"
var stringTemplate = fs.readFileSync("./" + file, "utf8");

//create new Emaik object
var email = new sendgrid.Email();

email.addTo(to);
email.setFrom(from);
email.setSubject(subject);
email.setHtml(stringTemplate); //pass in the string template we read from disk
email.addSubstitution("%email%", to); //sub. variables

sendgrid.send(email, function(err, res){
  //handle callbacks here
});

Solution 2

You need to convert the template to string. Try this:

var fs = require('fs');
var stringTemplate = fs.readFileSync("welcome.html", "utf8");

and then:

sendgrid.send({
 ...

template: stringTemplate })