TypeError: $(...).getValue is not a function - alpacajs

Question

I have this Alpaca form
I would like to get the content of the form (the values the user enters)
so I found an example on alpaca site
The example is working fine when the button is inside this.getValue(); is working fine
But from outside I am getting TypeError: $(...).getValue is not a function
What am I doing wrong?
$("#field1").alpaca({
"data": {
"firstName": "John",
"lastName": "McClane"
},
"schema": {
"type": "object",
"properties": {
"firstName": {
"type": "string",
"title": "First Name"
},
"lastName": {
"type": "string",
"title": "Last Name"
}
}
},
"options": {
"form": {
"buttons": {
"submit": {
"title": "Serialize - working fine....",
"click": function() {
var value = this.getValue();
alert(JSON.stringify(value, null, " "));
}
}
}
}
}
});
<!-- jquery -->
<script type="text/javascript" src="//code.jquery.com/jquery-1.11.1.min.js"></script>
<!-- bootstrap -->
<link type="text/css" rel="stylesheet" href="//maxcdn.bootstrapcdn.com/bootstrap/3.3.2/css/bootstrap.min.css" />
<script type="text/javascript" src="//maxcdn.bootstrapcdn.com/bootstrap/3.3.2/js/bootstrap.min.js"></script>
<!-- handlebars -->
<script type="text/javascript" src="//cdnjs.cloudflare.com/ajax/libs/handlebars.js/4.0.5/handlebars.js"></script>
<!-- alpaca -->
<link type="text/css" href="//cdn.jsdelivr.net/npm/alpaca#1.5.27/dist/alpaca/bootstrap/alpaca.min.css" rel="stylesheet" />
<script type="text/javascript" src="//cdn.jsdelivr.net/npm/alpaca#1.5.27/dist/alpaca/bootstrap/alpaca.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/handlebars#latest/dist/handlebars.js"></script>
<div id="field1" ></div>
<button onclick="console.log(JSON.stringify($('#field1').getValue(), null, ' '))">Serialize - Not working ....</button>

Answer 1

You should add alpaca() between $('#field1') and getValue()
JSON.stringify($('#field1').alpaca().getValue()
Here's a fiddle for that.