How to send a gtm vue event?

Question

Google Analytics

I need to submit a target like this on successful completion of a form in Vue

gtag('event', 'send', {
  'event_category': 'forms'
}); return true;

How can I do it right?
There is a vue-gtm and vue-analytic plugin, is it possible to do this through them, because I can’t find any information. I connect it to index.html, it swears gtag is not defined.

<script async src="https://www.googletagmanager.com/gtag/js?id=GA-TRACKING_ID"></script>
<script>
  window.dataLayer = window.dataLayer || [];
  function gtag(){dataLayer.push(arguments);}
  gtag('js', new Date());

  gtag('config', 'GA-TRACKING_ID');
</script>

This way it doesn’t work either, they say everything breaks down in general (does not see the form processing)

Answer 1

Create a variable in the windows object with a handler function pointer like this: mounted() {
window.vuehookfunction = this.someMethod.bind(this);
}
And then call in gtag:
gtag() {... window.vuehookfunction && window.vuehookfunction(params) ;}