javascript 返回顶部 - 使用ES6类

Posted 2021-05-03

/**
* Scrolls to top of page.
*
* @param {event} event - Prevents the default event of the trigger.
*/
function animateToTop(event) {
  event.preventDefault();
  window.scrollTo({
    top: 0,
    behavior: 'smooth'
  });
}

/**
* Scrolls to top of page.
*
*/
export class BackToTop {
/**
* Constructor.
*
*/
  constructor() {
    const button = document.querySelector('.js-back-to-top');

    if (button) {
      button.addEventListener('click', animateToTop);
    }
  }
}