编辑 Angular Material 的表格单元格填充 [英] Editing Angular Material's Table Cell Padding

问题描述

当我使用开发人员工具检查元素时，它显示零填充，但是当我查看它并将鼠标悬停在它上面时，它非常清楚地在单元格中有填充.我不知道这是从哪里来的，以及设置td { padding: 0 !important } 什么都不做.

When I inspect the element with developer tools it shows zero padding, but when I look a it and mouse over it, it very clearly has padding within the cell. I have no idea where this is coming from, and setting td { padding: 0 !important } does nothing.

推荐答案

感知的填充是由 display: table-cell; 和 vertical-align: inherit; 引起的>(通常是值 middle)来自默认浏览器/用户代理 <td> 样式与设置的 heighttr.mat-row.带有 CSS 类 .mat-row 的 默认设置高度为 48px.您可以调整高度或设置为 height: auto; 然后根据需要调整 td.mat-cell 的填充.这有效地消除了使用开发人员工具进行检查时可见的感知填充.在检查 <td> 时，在 Chrome 开发人员工具中看到的绿色填充可视化是如何在工具中显示带有表格单元格的中间垂直对齐元素.如果您检查该 <td> 的计算机属性，您会看到它的四个边都填充了零.

The perceived padding is being caused by display: table-cell; and vertical-align: inherit; (which usually is value middle) from the default browser/user-agent <td> styles in combination with a height being set on the tr.mat-row. The <tr> with CSS class .mat-row has a set height by default of 48px. You can adjust the height or set to height: auto; then adjust padding to the td.mat-cell as needed. This effectively removes the perceived padding that is visible when inspecting with developer tools. The green padding visualization seen in something like Chrome developer tools when inspecting the <td> is how just a middle vertically aligned element with table-cell is displayed in the tools. If you examine the Computer properties of that <td> you'll see it has zero padding on all four sides.

.mat-row {
  height: auto;
}

.mat-cell {
  padding: 8px 8px 8px 0;
}

这是一个StackBlitz，显示了height: auto;tr.mat-row 以及 td.mat-cell 上的自定义填充值.

Here is a StackBlitz showing the height: auto; on tr.mat-row as well as a custom padding value on td.mat-cell in action.

虽然我建议避免更改 td.mat-cell 上的 display 属性值，但您可以将其更改为类似 inline-block 无需调整 mat-row 的 height 即可查看效果.

While I'd recommend to avoid changing the display property value on td.mat-cell, you can change it to something like inline-block to see the effects without any adjustments to height of mat-row.

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