HTML - das neue Dialog Element

*{
  padding: 0;
  margin: 0;
  font-family: sans-serif;
  line-height: 1.5em;
}



p{
  padding: 1rem 0;
}

button{
  cursor: pointer;
  border: none;
  background: #292929;
  color: #fff;
  padding: 0.8rem;
  border-radius: 0.4rem;
  transition: all 0.5s;
}

button:hover{
  background: #a3a3a3;
  color: black;
}

dialog[open]{
  display: flex;
  flex-direction: column;
  justify-content: center;
  margin: auto 6rem;
  border: none;
  border-radius: 0.6rem;
}

dialog[open] p{
  padding: 2rem;
}

dialog[open] div{
  display: flex;
  justify-content: center;
  width: 100%;
}

dialog[open] button{
  margin: 0 1rem 1rem;
}

dialog[open]::backdrop{
  background: rgba(0,0,0,0.6);
  backdrop-filter: blur(3px);
}

<h1>Dialog Element Example - <span id="result">Deaktiviert</span></h1>

<p>
  Lorem ipsum dolor sit amet, <strong>consetetur</strong> sadipscing elitr, sed diam nonumy eirmod tempor invidunt ut labore et
  dolore magna aliquyam erat, sed diam voluptua. At vero eos et accusam et justo duo dolores et ea rebum. Stet
  clita kasd gubergren, no sea takimata sanctus est Lorem ipsum dolor sit amet. Lorem ipsum dolor sit amet,
  consetetur sadipscing elitr, sed diam nonumy eirmod tempor invidunt ut labore et dolore magna aliquyam erat, sed
  diam voluptua. <em>At vero eos et accusam et justo duo dolores et ea rebum.</em> Stet clita kasd gubergren, no sea
  takimata sanctus est Lorem ipsum dolor sit amet. Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed
  diam nonumy eirmod tempor invidunt ut labore et dolore magna aliquyam erat, sed diam voluptua. At vero eos et
  accusam et <strong>justo duo dolores et ea rebum</strong>. Stet clita kasd gubergren, no sea takimata sanctus est Lorem ipsum
  dolor sit amet.</p>

<button id="action">Show more Informations</button>

<p>
  Duis autem vel eum iriure dolor in <strong>hendrerit</strong> in vulputate velit esse molestie consequat, vel illum dolore eu
  feugiat nulla facilisis at vero eros et accumsan et iusto odio dignissim qui blandit praesent luptatum zzril
  delenit augue <em>duis dolore te feugait nulla facilisi</em>. Lorem ipsum dolor sit amet, consectetuer adipiscing elit,
  sed diam nonummy nibh euismod tincidunt ut laoreet dolore magna aliquam erat volutpat.</p>
<p>
  Ut wisi enim ad minim veniam, quis nostrud exerci tation ullamcorper suscipit lobortis nisl ut aliquip ex ea
  commodo consequat. Duis autem vel eum iriure dolor in hendrerit in vulputate velit esse molestie consequat, vel
  illum dolore eu feugiat <strong>nulla facilisis at vero eros et accumsan </strong> et iusto odio dignissim qui blandit praesent
  luptatum zzril delenit augue duis dolore te feugait nulla facilisi.
</p>

<p>Nam liber tempor cum soluta nobis eleifend option congue nihil imperdiet doming id quod mazim placerat facer
  possim assum. Lorem ipsum dolor sit amet, consectetuer adipiscing elit, sed diam nonummy nibh euismod tincidunt
  ut laoreet dolore magna aliquam erat volutpat. Ut wisi enim ad minim veniam, quis nostrud exerci tation
  ullamcorper suscipit lobortis nisl ut aliquip ex ea commodo consequat. </p>

<p>Duis autem vel eum iriure dolor in hendrerit in vulputate velit esse molestie consequat, vel illum dolore eu
  feugiat nulla facilisis.
</p>

<dialog id="dialog-1">
  <p>
    Nam liber tempor cum soluta nobis eleifend option congue nihil imperdiet doming id quod mazim placerat facer possim assum. Lorem ipsum dolor sit amet.
  </p>

  <div>
    <button class="checked">Einverstanden</button>
    <button class="disable">Deaktivieren</button>
  </div>
</dialog>

let dialogElement = document.getElementById('dialog-1');

if(dialogElement){

  console.log(document.getElementById('action'));

  document.getElementById('action').addEventListener('click',e => {
    dialogElement.showModal();
  });

  let checked = dialogElement.getElementsByClassName('checked');
  let disable = dialogElement.getElementsByClassName('disable');

  for(let button of checked){
    button.addEventListener('click',checkedFn);
  }

  for(let button of disable){
    button.addEventListener('click',disableFn);
  }

}

function checkedFn(e){
  dialog = this.closest('dialog');
  dialog.close();
  dialog.returnValue = "Aktiviert";
}

function disableFn(e){
  dialog = this.closest('dialog');
  dialog.close();
  dialog.returnValue = "Deaktiviert";
}

dialogElement.addEventListener('close',e => {
  document.getElementById('result').innerText = e.target.returnValue;
})

dialogElement.addEventListener('cancel',e => {
  console.log('cancel');
})