javascript - 移动 Safari，scrollIntoView 不起作用

Question

我在 iframe 的移动 Safari 上滚动到元素时遇到问题(它适用于其他浏览器，包括 mac 上的 Safari)。

我使用 scrollIntoView。我想在呈现所有内容后滚动。这是我的代码:

var readyStateCheckInterval = setInterval(function () {
    if (document.readyState === "complete") {
       clearInterval(readyStateCheckInterval);
        $browser.notifyWhenNoOutstandingRequests(function () {
            if (cinemaName != null && eventId == null) {
                scrollToCinema();
            } else {
                scrollToEvent();
            }
        });
     }
}, 10);
    
    
function scrollToEvent() {
    var id = eventId;
    var delay = 100;
    
    if (cinemaName != null) {
        id = cinemaName + "#" + eventId;
    }
    
    if ($rootScope.eventId != null) {
        id = $rootScope.cinemaId + "#" + $rootScope.eventId;
    }
    
    $timeout(function () {
        var el = document.getElementById(id);
        if (el != null)
        el.scrollIntoView(true);    
        $rootScope.eventId = null;
    }, delay);
}

Answer 1

ScrollIntoView 不工作(目前)。但是您可以手动计算元素的位置并滚动到它。这是我的解决方案

const element = document.getElementById('myId')

将元素传递给这个函数

/** Scrolls the element into view
 * Manually created since Safari does not support the native one inside an iframe
*/
export const scrollElementIntoView = (element: HTMLElement, behavior?: 'smooth' | 'instant' | 'auto') => {

  let scrollTop = window.pageYOffset || element.scrollTop

   // Furthermore, if you have for example a header outside the iframe 
   // you need to factor in its dimensions when calculating the position to scroll to
   const headerOutsideIframe = window.parent.document.getElementsByClassName('myHeader')[0].clientHeight

  const finalOffset = element.getBoundingClientRect().top + scrollTop + headerOutsideIframe

  window.parent.scrollTo({
    top: finalOffset,
    behavior: behavior || 'auto'
  })
}

陷阱:平滑滚动也不适用于 ios 移动设备，但您可以使用此 polyfill 补充此代码