编辑角度材质的表格单元格填充 [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，它会显示零填充，但是当我查看它并将其放在鼠标上时，它很明显在单元格中具有填充.我不知道这是哪里来的 td { padding: 0 !important }什么都不做.

解决方案

可感知的填充是由默认浏览器/用户代理display: table-cell;和vertical-align: inherit;(通常为值middle)引起的>样式，并在tr.mat-row上设置了height. CSS类为.mat-row的<tr>的默认高度为48px.您可以调整高度或将其设置为height: auto;，然后根据需要将填充调整为td.mat-cell.这有效地消除了在使用开发人员工具进行检查时可见的感觉到的填充.在检查<td>时，在Chrome开发人员工具中看到的绿色填充可视化效果是如何在工具中仅显示中间垂直对齐的带有表格单元的元素.如果检查<td>的计算机属性，您会发现它在所有四个边上的填充均为零.

.mat-row {
  height: auto;
}

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

这是 StackBlitz ，其中显示了tr.mat-row上的height: auto;以及自定义实际td.mat-cell上的填充值.

尽管我建议避免更改td.mat-cell上的display属性值，但可以将其更改为inline-block之类的值，以查看效果，而无需对mat-row的height进行任何调整.

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.

解决方案

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;
}

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.

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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