我相信这篇文章说了很多关于粘性的工作原理

How CSS Position Sticky Really Works! CSS position sticky has two main parts, sticky item & sticky container. Sticky Item — is the element that we defined with the position: sticky styles. The element will float when the viewport position matches the position definition, for example: top: 0px . Sticky Container —is the HTML element which wraps the sticky item. This is the maximum area that the sticky item can float in. When you define an element with position: sticky you’re automatically defining the parent element as a sticky container!

1.如果overflow在元素的任何父元素上设置为hidden、scroll或auto，位置粘滞很可能不起作用。

2.如果任何父元素都设置了高度，位置粘滞可能无法正常工作。

注意空网格区域!

在我的例子中，我有这样的东西:

.cart-areas {
    grid-template-columns: 2fr 0.2fr 1.5fr;
    grid-template-areas:
      'order . summary'
      'order . .'
      'order . .';
}

我希望当用户完成结帐表单时，总结网格项具有粘性。它没有工作，因为那些空的网格项(用。标记)。

解决方案是删除这些空项，如下所示:

.cart-areas {
    grid-template-columns: 2fr 0.2fr 1.5fr;
    grid-template-areas:
      'order . summary'
      'order . summary'
      'order . summary';
}

我相信这篇文章说了很多关于粘性的工作原理

How CSS Position Sticky Really Works! CSS position sticky has two main parts, sticky item & sticky container. Sticky Item — is the element that we defined with the position: sticky styles. The element will float when the viewport position matches the position definition, for example: top: 0px . Sticky Container —is the HTML element which wraps the sticky item. This is the maximum area that the sticky item can float in. When you define an element with position: sticky you’re automatically defining the parent element as a sticky container!

使用这个博客(https://www.designcise.com/web/tutorial/how-to-fix-issues-with-css-position-sticky-not-working)中的策略，我为那些无法控制页面中所有组件的人提供了一个选项

我使用的是Angular，在ngOnInit方法中，我运行这段代码来将父类的可见属性更改为可见

/**
 * position: sticky
 * only works if all parent components are visibile
 */
let parent = document.querySelector('.sticky').parentElement;
while (parent) {
  const hasOverflow = getComputedStyle(parent).overflow;
  if (hasOverflow !== 'visible') {
    parent.style.overflow = 'visible';
    // console.log(hasOverflow, parent);
  }
  parent = parent.parentElement;
}

如果你遇到这种情况，你的粘性不工作-试着设置父:

display: unset

为我工作