如何在页眉和页脚中间放置内容？

Question

我制作了一个带有“时间线”的 html 页面，该页面实际上是一个包含许多单元格的表格，下面的页面以该时间线作为主要内容，上面有一个带有导航栏的标题，下面有一个页脚与其他数据..

问题是主要内容位于页眉下方但在页脚下方，因此您可以在此处看到主要内容的滚动条从页眉下方开始，这是正确的，但有些表格行位于页脚下方，所以不是可见且滚动条位于页脚下方：

所以问题是如何将内容设置为适合页眉和页脚的中间？

tbody 看起来像这样，可能有数百个 trows

<tbody id="timeline"><tr id="1" data-salatav="1" class="table-row"><th scope="row" class="noselect row-head text-left">T. 1<span class="badge badge-dark ml-1">2</span></th><td style="padding: 0px; position: relative; z-index: 1;"></td><td style="padding: 0px; position: relative; z-index: 1;"></td><td style="padding: 0px; position: relative; z-index: 1;"></td><td style="padding: 0px; position: relative; z-index: 1;"></td><td style="padding: 0px; position: relative; z-index: 1;"></td><td style="padding: 0px; position: relative; z-index: 1;"></td><td style="padding: 0px; position: relative; z-index: 1;"></td><td style="padding: 0px; position: relative; z-index: 1;"></td><td style="padding: 0px; position: relative; z-index: 1;"></td><td style="padding: 0px; position: relative; z-index: 1;"></td><td style="padding: 0px; position: relative; z-index: 1;"></td><td style="padding: 0px; position: relative; z-index: 1;"></td><td style="padding: 0px; position: relative; z-index: 1;"></td><td style="padding: 0px; position: relative; z-index: 1;"></td><td style="padding: 0px; position: relative; z-index: 1;"></td><td style="padding: 0px; position: relative; z-index: 1;"></td><td style="padding: 0px; position: relative; z-index: 1;"></td><td style="padding: 0px; position: relative; z-index: 1;"></td><td style="padding: 0px; position: relative; z-index: 1;"></td><td style="padding: 0px; position: relative; z-index: 1;"></td></tr><tr id="2" data-salatav="1" class="table-row"><th scope="row" class="noselect row-head text-left">T. 2<span class="badge badge-dark ml-1">2</span></th><td style="padding: 0px; position: relative; z-index: 1;"></td><td style="padding: 0px; position: relative; z-index: 1;"></td><td style="padding: 0px; position: relative; z-index: 1;"></td><td style="padding: 0px; position: relative; z-index: 1;"></td><td style="padding: 0px; position: relative; z-index: 1;"></td><td style="padding: 0px; position: relative; z-index: 1;"></td><td style="padding: 0px; position: relative; z-index: 1;"></td><td style="padding: 0px; position: relative; z-index: 1;"></td><td style="padding: 0px; position: relative; z-index: 1;"></td><td style="padding: 0px; position: relative; z-index: 1;"></td><td style="padding: 0px; position: relative; z-index: 1;"></td><td style="padding: 0px; position: relative; z-index: 1;"></td><td style="padding: 0px; position: relative; z-index: 1;"></td><td style="padding: 0px; position: relative; z-index: 1;"></td><td style="padding: 0px; position: relative; z-index: 1;"></td><td style="padding: 0px; position: relative; z-index: 1;"></td><td style="padding: 0px; position: relative; z-index: 1;"></td><td style="padding: 0px; position: relative; z-index: 1;"></td><td style="padding: 0px; position: relative; z-index: 1;"></td><td style="padding: 0px; position: relative; z-index: 1;"></td></tr><tr id="3" data-salatav="1" class="table-row"><th scope="row" class="noselect row-head text-left">T. 3<span class="badge badge-dark ml-1">4</span></th><td style="padding: 0px; position: relative; z-index: 1;"></td><td style="padding: 0px; position: relative; z-index: 1;"></td><td style="padding: 0px; position: relative; z-index: 1;"></td><td style="padding: 0px; position: relative; z-index: 1;"></td><td style="padding: 0px; position: relative; z-index: 1;"></td><td style="padding: 0px; position: relative; z-index: 1;"></td><td style="padding: 0px; position: relative; z-index: 1;"></td><td style="padding: 0px; position: relative; z-index: 1;"></td><td style="padding: 0px; position: relative; z-index: 1;"></td><td style="padding: 0px; position: relative; z-index: 1;"></td><td style="padding: 0px; position: relative; z-index: 1;"></td><td style="padding: 0px; position: relative; z-index: 1;"></td><td style="padding: 0px; position: relative; z-index: 1;"></td><td style="padding: 0px; position: relative; z-index: 1;"></td><td style="padding: 0px; position: relative; z-index: 1;"></td><td style="padding: 0px; position: relative; z-index: 1;"></td><td style="padding: 0px; position: relative; z-index: 1;"></td><td style="padding: 0px; position: relative; z-index: 1;"></td><td style="padding: 0px; position: relative; z-index: 1;"></td><td style="padding: 0px; position: relative; z-index: 1;"></td></tr><tr id="4" data-salatav="1" class="table-row"><th scope="row" class="noselect row-head text-left">T. 4<span class="badge badge-dark ml-1">2</span></th><td style="padding: 0px; position: relative; z-index: 1;"></td><td style="padding: 0px; position: relative; z-index: 1;"></td><td style="padding: 0px; position: relative; z-index: 1;"></td><td style="padding: 0px; position: relative; z-index: 1;"></td><td style="padding: 0px; position: relative; z-index: 1;"></td><td style="padding: 0px; position: relative; z-index: 1;"></td><td style="padding: 0px; position: relative; z-index: 1;"></td><td style="padding: 0px; position: relative; z-index: 1;"></td><td style="padding: 0px; position: relative; z-index: 1;"></td><td style="padding: 0px; position: relative; z-index: 1;"></td><td style="padding: 0px; position: relative; z-index: 1;"></td><td style="padding: 0px; position: relative; z-index: 1;"></td><td style="padding: 0px; position: relative; z-index: 1;"></td><td style="padding: 0px; position: relative; z-index: 1;"></td><td style="padding: 0px; position: relative; z-index: 1;"></td><td style="padding: 0px; position: relative; z-index: 1;"></td><td style="padding: 0px; position: relative; z-index: 1;"></td><td style="padding: 0px; position: relative; z-index: 1;"></td><td style="padding: 0px; position: relative; z-index: 1;"></td><td style="padding: 0px; position: relative; z-index: 1;"></td></tr><tr id="5" data-salatav="1" class="table-row"><th scope="row" class="noselect row-head text-left">T. 5<span class="badge badge-dark ml-1">3</span></th><td style="padding: 0px; position: relative; z-index: 1;"></td><td style="padding: 0px; position: relative; z-index: 1;"></td><td style="padding: 0px; position: relative; z-index: 1;"></td><td style="padding: 0px; position: relative; z-index: 1;"></td><td style="padding: 0px; position: relative; z-index: 1;"></td><td style="padding: 0px; position: relative; z-index: 1;"></td><td style="padding: 0px; position: relative; z-index: 1;"></td><td style="padding: 0px; position: relative; z-index: 1;"></td><td style="padding: 0px; position: relative; z-index: 1;"></td><td style="padding: 0px; position: relative; z-index: 1;"></td><td style="padding: 0px; position: relative; z-index: 1;"></td><td style="padding: 0px; position: relative; z-index: 1;"></td><td style="padding: 0px; position: relative; z-index: 1;"></td><td style="padding: 0px; position: relative; z-index: 1;"></td><td style="padding: 0px; position: relative; z-index: 1;"></td><td style="padding: 0px; position: relative; z-index: 1;"></td><td style="padding: 0px; position: relative; z-index: 1;"></td><td style="padding: 0px; position: relative; z-index: 1;"></td><td style="padding: 0px; position: relative; z-index: 1;"></td><td style="padding: 0px; position: relative; z-index: 1;"></td></tr></tbody>

由于 html 文件太大，我将发布 HERE 包含所有 css 和 html 部分的 JSFiddle。

Answer 1

降低tableFixedHead的最大高度如下所示

.tableFixHead {
    max-height: calc(100vh - 114px);
    overflow-y: scroll;
}

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