Manually send a conversion hit to GA when a submit button is clicked on a form.

simple-form-conversion-example.html

<form
  action="http://caughtmyeye.epizy.com/simple-form/"
  id="simple-test-form"
  method="post"
  data-avia-form-id="1"
  data-avia-redirect=""
  _lpchecked="1"
>
  <fieldset>
    <h3>Simple Test Form</h3>
    <p id="element_avia_1_1">
      <label for="avia_1_1"
        >Name <abbr title="required">*</abbr></label
      >
      <input
        name="avia_1_1"
        type="text"
        id="avia_1_1"
        value=""
      />
    </p>
    <p
      id="element_avia_2_1"
    >
      <label for="avia_2_1"
        >Message <abbr title="required">*</abbr></label
      >
      <textarea
        name="avia_2_1"
        cols="40"
        rows="7"
        id="avia_2_1"
      ></textarea>
    </p>
    <p style="display:none;">
      <input
        type="text"
        name="avia_3_1"
        id="avia_3_1"
        value=""
      />
    </p>
    <p>
      <input type="hidden" value="1" name="avia_generated_form1" />
      <input
        id="simple-test-form-btn"
        type="submit"
        value="Submit"
        class="button"
        data-sending-label="Sending"
      />
    </p>
  </fieldset>
</form>

simple-form-conversion-example.js

if ( document.URL === 'http://caughtmyeye.epizy.com/simple-form/') {
  const subBtn= document.getElementById(
    "simple-test-form-btn"
  );
  if (subBtn) {
    subBtn.addEventListener(
      "click",
      function(evt) { ga("send", "event", "form", "conversion", "Simple Form Test Submit", 1) },
      false
    );
  }
}