同时使用键盘事件进行滚动和 CSS 滚动捕捉时发生冲突

Conflict when simultaneously using keyboard events for scrolling and CSS scroll snapping

您可以通过按 Space 栏Page Up / Page Down 和 [=34 水平滚动我的演示页面=]左箭头/右箭头键。您还可以使用鼠标或触控板捕捉滚动。

但只有一个有效。

键盘事件和CSS滚动对齐是否可以共存?我错过了什么?任何帮助将不胜感激,因为我已经为这个问题苦苦挣扎了一个多星期。


Check out my demo on CodePen

(请取消注释相关的 CSS 代码以启用滚动捕捉效果,以便看到键盘快捷键停止工作。)


import animate from "https://cdn.jsdelivr.net/npm/animateplus@2/animateplus.js"

const sections = Array.from(document.querySelectorAll("section")).sort(
  (s1, s2) => {
    return s1.getBoundingClientRect().left - s2.getBoundingClientRect().left
  }
)

const getSectionInView = () => {
  const halfWidth = window.innerWidth / 2
  const index = sections.findIndex(
    section =>
      section.getBoundingClientRect().left <= halfWidth &&
      section.getBoundingClientRect().right > halfWidth
  )
  return index
}

const getNextSection = dir => {
  const sectionInViewIndex = getSectionInView()
  const nextIndex = sectionInViewIndex + dir
  const numSections = sections.length
  const nextSectionIndex =
    nextIndex < 0 || nextIndex >= numSections ? sectionInViewIndex : nextIndex
  return sections[nextSectionIndex]
}

const container = document.scrollingElement

const animateScroll = dir => {
  const from = container.scrollLeft
  const { left } = getNextSection(dir).getBoundingClientRect()
  return progress => (container.scrollLeft = from + progress * left)
}

window.onload = () => {
  document.body.onkeydown = event => {
    switch (event.key) {
      case " ": // Space Bar
      case "PageDown":
      case "ArrowRight": {      
        animate({
          easing: "out-quintic",
          change: animateScroll(1)
        })
        break
      }
      case "PageUp":
      case "ArrowLeft":  {      
        animate({
          easing: "out-quintic",
          change: animateScroll(-1)
        })
        break
      }
    }
  }
}


注意:我正在使用一个名为 Animate Plus 的小而优雅的模块来实现平滑的滚动动画。


更新:@Kostja 的解决方案在 Chrome 中有效,但在 Mac 或 iOS 的 Safari 中无效,它在 Safari 中有效对我来说至关重要。

我猜没有,css 覆盖了 javascript。但是您可以简单地添加 wheel 事件监听器,例如:

window.addEventListener("wheel", function() {
    if(event.deltaY > 0){
      animate({
        easing: "out-quintic",
        change: animateScroll(1)
      })      
    }
      if(event.deltaY < 0){
      animate({
        easing: "out-quintic",
        change: animateScroll(-1)
      })      
    }      
});

https://codepen.io/kostjaaa/pen/NWWVBKd

window.onload = () => {
  window.addEventListener("wheel", () => {
    const direction = event.deltaY > 0 ? 1 : event.deltaY < 0 ? -1 : false;

    if (direction) {
      animate({
        easing: "out-quintic",
        change: animateScroll(direction)
      });
    }
  });

  document.body.onkeydown = event => {
    switch (event.key) {
      case " ": // Space Bar
      case "PageDown":
      case "ArrowRight": {
        animate({
          easing: "out-quintic",
          change: animateScroll(1)
        });
        break;
      }
      case "PageUp":
      case "ArrowLeft": {
        animate({
          easing: "out-quintic",
          change: animateScroll(-1)
        });
        break;
      }
    }
  };
};    

这应该有效。

https://codepen.io/JZ6/pen/XWWQqRK