1290904.html - mozsearch

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<!DOCTYPE html>

<html>

  <body>

    <fieldset id="outer">

      <fieldset id="inner">

      </fieldset>

    </fieldset>

  </body>

</html>

<script>

function appendTextareaToFieldset(fieldset) {

  var textarea = document.createElement("textarea");

  textarea.setAttribute("required", "");

  fieldset.appendChild(textarea);

var innerFieldset = document.getElementById('inner');

var outerFieldset = document.getElementById('outer');

var fieldset = document.createElement('fieldset');

appendTextareaToFieldset(fieldset);

appendTextareaToFieldset(fieldset);

appendTextareaToFieldset(fieldset);

appendTextareaToFieldset(fieldset);

// Adding a fieldset to a nested fieldset.

innerFieldset.appendChild(fieldset);

appendTextareaToFieldset(fieldset);

appendTextareaToFieldset(fieldset);

// This triggers mInvalidElementsCount checks in outer fieldset.

appendTextareaToFieldset(outerFieldset);

// Removing a fieldset from a nested fieldset.

innerFieldset.removeChild(fieldset);

// This triggers mInvalidElementsCount checks in outer fieldset.

appendTextareaToFieldset(outerFieldset);

</script>