[Javascript] Finding Parent Elements

const app = document.getElementById('app');
app.innerHTML = `
  <h1>JavaScript DOM</h1>
  <div class="item"></div>
`;

const item = document.querySelector('.item');

console.log(item.parentNode);
console.log(item.parentElement.parentElement);

console.log(item.closest('#app'));
console.log(item.closest('body'));

 

来源：https://www.cnblogs.com/Answer1215/p/12596289.html