Prevent Button from hitting multiple times

[akroii]

When you set up a form with multistep page behaviour, it is possible to hit the final submit button multiple times while the form is processing. After this you would get the current url in the frame.

I'm using it in combination with

Contao: 4.9.33 terminal42/contao-ajaxform: 1.1.3 terminal42/contao-mp_forms: 4.4.0

[akroii]

In hindsight, I think this is a UX/UI feature that a developer should do themselves.

  if(document.querySelector("#ds") !== null){
    document.getElementById("ds").addEventListener("submit",function(event) {
      if(event.submitter.id == "mp_form_pageswitch_108_5"){
        document.getElementById('mp_form_pageswitch_108_5').disabled = true;
        console.log("button disabled");
      }
    });
  }