javascript - Can the var u = "installed url" in the piwik tracking code be replaced with an IP address?

I want to replace the url with the IP address in piwik’s tracking code to save the step of parsing

<code><!-- Piwik -->
<script type="text/javascript">
  var _paq = _paq || [];
  _paq.push(['trackPageView']);
  _paq.push(['enableLinkTracking']);
  (function() {
    var u="//linlin.ngrok.com/";
    _paq.push(['setTrackerUrl', u+'piwik.php']);
    _paq.push(['setSiteId', '11']);
    var d=document, g=d.createElement('script'), s=d.getElementsByTagName('script')[0];
    g.type='text/javascript'; g.async=true; g.defer=true; g.src=u+'piwik.js'; s.parentNode.insertBefore(g,s);
  })();
</script>
<noscript><p><img src="//linlin.ngrok.com/piwik.php?idsite=11" style="border:0;" alt="" /></p></noscript>
<!-- End Piwik Code --></code>

But changing var u in the code to the corresponding IP cannot be traced. I don’t quite understand. Do I need to modify any configuration of piwik?

Reply content:

I want to replace the url with the IP address in piwik’s tracking code to save the step of parsing

<code><!-- Piwik -->
<script type="text/javascript">
  var _paq = _paq || [];
  _paq.push(['trackPageView']);
  _paq.push(['enableLinkTracking']);
  (function() {
    var u="//linlin.ngrok.com/";
    _paq.push(['setTrackerUrl', u+'piwik.php']);
    _paq.push(['setSiteId', '11']);
    var d=document, g=d.createElement('script'), s=d.getElementsByTagName('script')[0];
    g.type='text/javascript'; g.async=true; g.defer=true; g.src=u+'piwik.js'; s.parentNode.insertBefore(g,s);
  })();
</script>
<noscript><p><img src="//linlin.ngrok.com/piwik.php?idsite=11" style="border:0;" alt="" /></p></noscript>
<!-- End Piwik Code --></code>

But changing var u in the code to the corresponding IP cannot be traced. I don’t quite understand. Do I need to modify any configuration of piwik?