htnl поле JS

    waitForIframeAndPrintContent(function(content) {
      s_widget.setFieldValue('description_html', content)
    });

function waitForIframeAndPrintContent(callback) {
  var container = document.querySelector('.description_html');

  if (!container) {
    console.error('Container not found');
    return;
  }

  // Function to check and extract iframe content
  function checkAndExtractIframeContent() {
    var iframe = container.querySelector('iframe');
    if (iframe && iframe.contentWindow.document.body) {
      try {
        var content = iframe.contentWindow.document.body.innerHTML;
        console.log('Iframe content:', content);
        callback(content);  // Call the callback function with the content
      } catch (error) {
        console.error('Error accessing iframe content:', error);
      }
    } else {
      console.error('Iframe not found');
    }
  }

  // Creating an observer to watch for DOM changes
  var observer = new MutationObserver(function(mutations, obs) {
    var iframe = container.querySelector('iframe');
    if (iframe && iframe.contentWindow.document.body) {
      checkAndExtractIframeContent();
      obs.disconnect(); // Stop observing once the iframe is processed
    }
  });

  // Observer configuration
  var config = { childList: true, subtree: true };

  // Start observing
  observer.observe(container, config);

  // Also check once directly in case the iframe is already there
  checkAndExtractIframeContent();
}

// Example usage:
waitForIframeAndPrintContent(function(content) {
  // You can use the content here
  console.log('Received iframe content:', content);
});