Mailgun & Vue?

Hello everyone,

I'm nearing the end of building a static website (using Jigsaw and have used some Vue.

I'm trying to use the bojand/mailgun-js node package and I'm not 100% sure on how to use it with Vue. At the moment, when my form is submitted I have it set up to fire the following method.

submit: function() {

    var mailgun = require('mailgun-js')({
        apiKey: 'key-XXXXXXXXXX',
        domain: 'smtp.mailgun.org'
    });

    var data = {
        from:       this.message.name + ' <'+ this.message.email +'>',
        to:         '[email protected]',
        subject:    'Message Received',
        text:       this.message.body
    };

    mailgun.messages().send(data, function (error, body) {
        console.log(body);
    });
}

I've basically copied and pasted the documentation and obviously tweaked some values based on the data my form receives.

When I submit the form, I get the following message in the console:

app.js:488 Uncaught TypeError: Invalid Version:

Then without changing anything, if I submit it again I get this:

app.js:99211 Uncaught TypeError: require(...) is not a function

Has anyone used this package before? If yes, any ideas how I can get this working?