[Search nearest element from another element] Search nearest element from another element

index.js

  // example findNextPageBreak(startElement, "page-class") 
  function findNextPageBreak(startElement, classElement) {
    let currentElement = startElement;
    while (currentElement) {
      if (currentElement.nextElementSibling && currentElement.nextElementSibling.classList.contains(classElement)) {
        return currentElement.nextElementSibling;
      }
      currentElement = currentElement.nextElementSibling || currentElement.parentNode;
      
      if (currentElement.tagName === 'BODY') {
        break;
      }
    }
    return null;  
  }