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const bookList = document.querySelector('#book-list');
console.log('book list parent element:', bookList.parentElement);
console.log('book list parent node:', bookList.parentNode);
console.log('all node children:');
Array.from(bookList.childNodes).forEach(function(node){
console.log(node);
});
console.log('all element children:');
Array.from(bookList.children).forEach(function(node){
console.log(node);
});
const titles = bookList.querySelectorAll('.name');
console.log('Book titles:');
Array.from(titles).forEach(function(title){
console.log(title.textContent);
});