Handlebars dynamic each loop with object coming from data json

content.json

{
  "reference": "Content.extraInfo.pdfs"
}

eachDynamic.js

module.exports = function (path, context, option) {
	var ret = "";

	if(!option){
		option = context;
		context = option.data.root;
	}

	context = getProperty(path, context);

	for(var i=0, j=context.length; i<j; i++) {
		option.data.index = i;
		option.data.first = i === 0;
        	option.data.last = i === (j - 1);

		ret = ret + option.fn(context[i]);
	}

	return ret;
};

	
function getProperty( propertyName, object ) {
	var parts = propertyName.split( "." ),
		length = parts.length,
		i,
		property = object || this;

	for ( i = 0; i < length; i++ ) {
		property = property[parts[i]];
	}

	return property;
}

test.hbs

{{#eachDynamic this.reference}}
	<li>{{@index}} {{@first}} {{@last}}</li>
{{/eachDynamic}}

// Can override default this context with custom if you like
{{#eachDynamic this.reference @root}}
	<li>{{@index}} {{@first}} {{@last}}</li>
{{/eachDynamic}}