How to solve the problem that the body part disappears after exceeding the header in the automatic scrolling effect of the table?

Automatic table scrolling: Solve the problem of content overflowing the header

When creating automatic scrolling effects of tables, you often encounter a difficult problem: the main content of the table is scrolled beyond the header and disappears, affecting the visual effect and user experience. This article will analyze the root cause of the problem and provide a CSS solution.

Problem: Content overflows the header

When using animation to automatically scroll the table, the tbody may scroll beyond the header before disappearing, as shown in the figure below:

(Illustration: The table rows are still visible after exceeding the header when scrolling)

Here is a sample code:

serial number	Steel level	Specification	area	Library position number
1	1000	twenty two	A	121

/*Table scroll animation*/
@keyframes table {
  0% { transform: translateY(0); }
  100% { transform: translateY(-100%); }
}

.table tbody {
  animation: table 10s infinite linear;
}

Analyze the root cause of the problem

The problem is that the animation of the tbody element causes its content to exceed the visible area of ​​the table container. overflow: hidden property of tbody is invalid because it only acts on tbody own content, not the entire table.

Solution: CSS Style Adjustment

To prevent tbody content from overflowing the table header, we need to adjust the CSS styles of .table and .table thead :

 /*Table scroll animation*/
@keyframes table {
  0% { transform: translateY(0); }
  100% { transform: translateY(-100%); }
}

.table {
  overflow: hidden; /* Hide content beyond the table container*/
}

.table thead {
  position: relative; /* Use relative positioning*/
  z-index: 1; /* Improve the level and cover tbody */
  background-color: #fff; /* Make sure the table header background color covers the scrolling content*/
}

.table tbody {
  animation: table 10s infinite linear;
}

By applying overflow: hidden to .table we ensure that all content beyond the table container is hidden. Meanwhile, set .table thead to relative positioning and increase z-index value so that it always lies above tbody , effectively covering the overflowing content. Adding background-color ensures that the background color of the table header covers the scrolling content to avoid gaps. This solves the problem that the table content overflows the header, and achieves a clean and tidy automatic scrolling effect.

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