Chrome: 应用两个滚动条时的自定义滚动条问题

Chrome: custom scrollbar problem when both scroll bars are applied

检查 Chrome/Safari/new Edge 中的以下代码段,并将容器滚动到最底部:

body { background-color: #fff }

section {
  background-color: #f8f8f8;
  width: 400px;
  height: 150px;
  padding: 10px;
  overflow: overlay;
}

.force-overflow {
  background-image: linear-gradient(45deg, orange, yellow, orange);
  height: 600px;
}

::-webkit-scrollbar {
  background-color: #F5F5F5;
  height: 10px;
  width: 10px;
}

::-webkit-scrollbar-track {
  background-color: #F5F5F5;
  box-shadow: inset 0 0 3px rgba(0,0,0,0.2);
}

::-webkit-scrollbar-thumb {
  background: #999;
}

::-webkit-scrollbar-thumb:hover {
  background: #444;
}

::-webkit-scrollbar-corner {
  background: transparent;
}
<section>
  <div class="force-overflow"></div>
</section>

这按预期工作。

现在如果我们添加一个水平溢出:

body { background-color: #fff }

section {
  background-color: #f8f8f8;
  width: 400px;
  height: 150px;
  padding: 10px;
  overflow: overlay;
}

.force-overflow {
  background-image: linear-gradient(45deg, orange, yellow, orange);
  height: 600px;
  width: 1200px;
}

::-webkit-scrollbar {
  background-color: #F5F5F5;
  height: 10px;
  width: 10px;
}

::-webkit-scrollbar-track {
  background-color: #F5F5F5;
  box-shadow: inset 0 0 3px rgba(0,0,0,0.2);
}

::-webkit-scrollbar-thumb {
  background: #999;
}

::-webkit-scrollbar-thumb:hover {
  background: #444;
}

::-webkit-scrollbar-corner {
  background: transparent;
}
<section>
  <div class="force-overflow"></div>
</section>

然后滚动到 right/bottom,我们得到这个:

我知道我可以使用 overflow: auto; 而不是 overflow: overlay; 来解决这个问题,但我真的很想坚持使用 overlay,因为它会阻止您的布局尽快“跳跃”滚动条显示 up/vanishes.

有人知道如何解决这个问题吗?

一个 hacky 解决方案是添加一些 box-shadow 来覆盖这部分:

::-webkit-scrollbar-thumb:horizontal {
  box-shadow: 3px 0 0 0;
}
::-webkit-scrollbar-thumb:vertical {
  box-shadow: 0 3px 0 0;
}

body { background-color: #fff }

section {
  background-color: #f8f8f8;
  width: 400px;
  height: 200px;
  padding: 10px;
  overflow: overlay;
}

.force-overflow {
  background-image: linear-gradient(45deg, orange, yellow, orange);
  height: 800px;
  width: 1200px;
}

::-webkit-scrollbar {
  background-color: #F5F5F5;
  height: 10px;
  width: 10px;
}

::-webkit-scrollbar-track {
  background-color: #F5F5F5;
  box-shadow: inset 0 0 3px rgba(0,0,0,0.2);
}

::-webkit-scrollbar-thumb {
  background: #999;
  color:#999;
  transition-duration: 2s;
}
::-webkit-scrollbar-thumb:horizontal {
  box-shadow: 3px 0 0 0;
}
::-webkit-scrollbar-thumb:vertical {
  box-shadow: 0 3px 0 0;
}


::-webkit-scrollbar-thumb:hover {
  background: #444;
  color:#444;
  transition-duration: 2s;
}
::-webkit-scrollbar-corner {
  background: transparent;
}
<section>
  <div class="force-overflow"></div>
</section>