我刚刚偶然发现 overflow:hidden 在 html 上的使用，这对我来说似乎不合逻辑：

* {
  all: unset;
  display: revert;
}
html {
  height: 100vh;
  overflow: hidden;
  background: black;
}
body {
  height: 50vh;
  font-size: 5rem;
  background: white;
  scroll-snap-type: y mandatory;
  scroll-behavior: smooth;
  overflow-y: scroll;
}

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这是关于将滚动框从 html 移动到 body ，但我不明白为什么这个例子只适用于 overflow:hidden？ body的高度已经只有50vh，那么html元素上应该不会发生溢出吧？