Use onload event attribute

by WittigMarcus

HTML

<body onload=domainRef()>
  <div id="divref">
    <script>
      function domainRef() {
        var ref = document.referrer.toString();
        document.getElementById("test").value = ref;
      }
    </script>
  </div>
  <input id="test" value="">
  <p>
  Used in my answer to:
  </p><a href="https://stackoverflow.com/questions/55533287/how-to-pass-a-variable-into-a-input-value-on-page-load">how-to-pass-a-variable-into-a-input-value-on-page-load</a>
</body>