[2319] Nuxt.js with compiled Vue.js app

Please.. I need help. I have two applications. First of them was built on Nuxt.js and the second on Vue.js. How can i put this second one to Nuxt page component? First I need include this files to head of page:

<script type="text/javascript" src="http://localhost/js/manifest.js"></script>
<script type="text/javascript" src="http://localhost/js/vendor.js"></script>
<script type="text/javascript" src="http://localhost/js/app.js"></script>
<script type="text/javascript" src="http://localhost/js/fetch.js"></script>

and next on component HTML template I have this box:

<div id="comments"></div>

and after that I need call this function:

<script type=text/javascript>
       window.appComments({
           selector: '#comments',
           token: '123456789',
           apiURL: 'https://someurl.com/',
           uri: 'some uri',
           title: 'Sample title of an article',
           url: 'some URL'
        })
</script>

I try copy and paste this code to component HTML template and also put it to mounted().. Always I get this errors :

"Uncaught TypeError: window.appComments is not a function" "Uncaught TypeError: Cannot read property 'call' of undefined"

What's wrong with that :( ?